Society for Georgia Archaeology » climate change

Tag: climate change

These articles from all over the SGA website have been tagged with 'climate change'. Tags are subject identifiers that make it easier for you to search for all content that covers a certain area of interest. Use the 'tag cloud' at the bottom right of the sidebar: click on a tag, and all articles with that tag are gathered for you on one page. Have suggestions for tags for a particular article? Let us know.

What’s in a name?

Humans habitually categorize things they think about. This includes objects (consider: animal, vegetable, mineral) and concepts (consider: real versus abstract). Categorization involves priorizing certain characteristics that may be either similar or different.

We also categorize time. We talk about timelines, yet we divide them into chunks. Georgia’s archaeology timeline is commonly divided into chunks or segments with names like Mississippian, contact-era, antebellum, and postbellum. Elsewhere on this website we present a brief summary of Georgia’s human past, which includes similarly named time-periods.

retaining_wall_for_road.jpg

Hiker in a Wilderness Area in northern Georgia standing atop an retaining wall, built for a road or railroad, now supporting a hiking trail. Thus, is this really a Wildernesss Area? This image both illustrates the kind of landscape change the authors mean by Anthropocene, and the human habit of categorizing that landscape….

How these chunks are defined shape how we talk and think about them. The also shape the questions we ask and the research we do. They shape comparisons, and conclusions. Perhaps the degree that they shape them is either minimal or obvious, but, still, they are shaped.

Recently, several geologists have proposed that the most recent geological period, the one we’re living in now, should be newly categorized and called the Anthropocene.

Geologists Jan Zalasiewicz, Mark Williams, Will Steffen, and Paul Crutzen (Crutzen originally proposed the term in 2002), in a 2010 article*, argue that this term, Anthropocene, should be used because:

It can be argued that a formal Anthropocene Epoch would inherently downplay the scale and significance of preindustrial (early agricultural) modification of landscape…and oversimplify the complex and historically protracted human effects on the natural environment. In response, one might say that existing formal boundaries within deep geological time do not typically have such a deleterious scientific effect; more typically the research carried out to establish them illuminates the complex course of palaeoenvironmental history. Regardless, the Anthropocene has taken root in the scientific community, and is now unlikely to decline through practical neglect by working scientists.

The term, also, has a resonance that goes beyond the modification of a geological classificatory scheme. It has attracted public interest, probably because it encapsulates—indeed integrates—the many and diverse kinds of environmental change that have taken place. The transition from the Holocene into the Anthropocene may be developed, too—somewhat controversially—into the concept of planetary boundaries…, wherein a safe operating space for humanity may be defined. [page 2230]

The term Anthropocene has yet to be formally adopted by geologists. Despite resistance from some other geologists, the authors conclude:

However these debates will unfold, the Anthropocene represents a new phase in the history of both humankind and of the Earth, when natural forces and human forces became intertwined, so that the fate of one determines the fate of the other. Geologically, this is a remarkable episode in the history of this planet. [page 2231]

Do you think it’s a good idea to rename the modern geological epoch to highlight the changes the world is undergoing that are introduced and exacerbated by human behavior? Do you have a comment you want to make? Log in and do so, please!

* Zalasiewicz, Jan, Mark Williams, Will Steffen, and Paul J. Crutzen / 2010 / The New World of the Anthropocene. Environmental Science and Technology 44(7):2228–2231. [Online here.]

Archaeogenetics summarized in Current Biology

Global Genetic History of Homo sapiens is the title of a new special issue of Current Biology (volume 20, issue 4, dated 23 February 2010), with eight papers available free online.

The first article is a guest editorial by Colin Renfrew, a British archaeologist who has worked for decades in the Middle East. His books often focus on the emergence of civilization, the emergence of Indo-European languages, and a relatively new subdiscipline in archaeology called archaeogenetics. Renfrew has defined archaeogenetics as research at the confluence of archaeology, linguistics, and genetics. Archaeogenetics, therefore, uses molecular genetics to expand archaeological data about early human populations. This is particularly useful in reconstructions—or models—of early human migrations and the populating of the globe.

Renfrew’s editorial, “Archaeogenetic—Towards a ‘New Synthesis’?” sets up the other articles in this special issue. The next six papers address human migration in specific geographic areas: Africa, Europe, South Asia, East Asia, Oceania, and the Americas. Each provides considerable detail and summarizes genetic, linguistic, and archaeological data for the region.

Renfrew closes his introductory editorial with these observations:

Perhaps the most important general point that can be drawn from the reviews assembled in this special issue might be that we have not yet learnt how to interpret the data very effectively. A number of contributors have commented upon the need for simulation studies, based upon explicit models which might allow the testing of specific scenarios…, and this is likely to be one of the most important future research directions. Above all, the pace of research is now so fast that new insights are soon likely to become available. These are early days in the field of archaeogenetic research, and I predict that over the next twenty years or so a more coherent synthesis of the data from genetics, archaeology and linguistics is likely to emerge than we can yet envisage. [page R165]

Figure 1* from O’Rourke and Raff’s article.

As an example of the geographically defined articles, consider the one on the Americas, “The Human Genetic History of the Americas: The Final Frontier” by Dennis H. O’Rourke and Jennifer A. Raff. O’Rourke and Raff marshal mitochondrial DNA data (which is passed down through the maternal line) that shows five major genetic groups among New World peoples. They conclude that these data, along with other genetic data, suggest New World peoples coalesced “just prior to or immediately after the LGM”—the Late Glacial Maximum. The LGM refers to the last time ice sheets extended far south/north from the Earth’s poles, when mid-latitude locales were cooler and drier than today. As the ice formed, it lowered sea levels, when the ice captured sea water. Thus, more land was exposed on the margins of continents, and the Bering Sea land bridge could have provided a “highway” for Asian peoples traveling eastward, either on land or in small boats following the coast. Given the very early dates for human occupations from southern South America, O’Rourke and Raff note:

…the archaeological data in the Americas continue to raise questions regarding the timing and mode of colonization. The resolution afforded by the newer molecular data assists in evaluating alternative migration scenarios. [page R202]

Yet, even with all the data they bring together, O’Rourke and Raff conclude, as do many researchers regarding a wide variety of topics, that “more work is needed.” They write:

“Complete agreement between mtDNA, Y-chromosomal DNA and autosomal genetic systems has not yet been realized with respect to colonization models….” [page R206]

This is consistent with observations in the final article, “The Genetics of Human Adaptation: Hard Sweeps, Soft Sweeps, and Polygenic Adaptation” by Jonathan K. Pritchard, Joseph K. Pickrell, and Graham Coop. They agree with the last quote above:

Ultimately, a comprehensive model of the nature of selection would tell us how much adaptation occurs by any of a variety of different models and mechanisms. … To make real progress on these problems will require much greater integration of selection studies with biological information. [page R213]

These articles that summarize the current understanding of human archaeogenetics are insightful and informative, although some of the data they discuss is rather technical. Perhaps after you take a look at one or two of them, you will have some comments you’d like to note here—please login and do so!

The link to the special issue is here; you can download any of the eight papers individually.

* The original figure caption reads: “Hypothesized routes for original migration into the Americas. The Beringian and Pacific coastal routes (blue and yellow, respectively) may have been roughly contemporaneous following the Last Glacial Maximum (LGM), although contemporaneity is not certain. The more hypothetical northern migration path (red) implies a pre-LGM population movement. These migration paths need not be considered mutually exclusive.”

Jekyll Island’s Hidden Past

Profile_09_Jekyll_painting

Portrayal of Native American life on Jekyll Island (original painting by Melissa Crawford, Art Major at the University of West Georgia).

People have called the small barrier island now known as Jekyll home for many centuries, but only the most obvious and recent reminders of that history are usually recognized today. Each year thousands of visitors are introduced to the splendid “cottages” and manicured landscapes of the Jekyll Island Club and their connection with the rich and famous industry giants of the late 19th and early 20th centuries. Many also see the ruins of tabby structures that stand as silent memorials to English colonization of the Georgia coast during the 18th century and to the later plantation endeavors of the French owners of the island, the DuBignon family.

As important as these historic resources are, they represent only part of the total cultural heritage of Jekyll Island. What now stands above the ground is a fraction of the fragile evidence that marks this island’s remarkable past. Much more survives below the ground as archaeological evidence—the buried structural elements, landscape features, artifacts and food remains from the day to day lives of people over the millennia. At least 95 percent of the total patrimony of the island preceded British interests here. This place was the home of Native Americans for more than 4000 years before the first European arrived. Their history is Jekyll Island’s hidden cultural heritage, a past marked by traces of oyster shell on the ground surface and the buried archaeological remains left behind by countless generations.

Archaeological research has been undertaken from time to time on Jekyll Island for over 50 years, providing a basic sketch of the island’s cultural history. Dozens of archaeological sites have been recorded through survey efforts and limited excavations on the island and its nearby hammocks. The best-known historic sites—Horton House and Millionaire’s Village—were also the locations of major prehistoric sites, indicating that these high-ground areas that are easily accessible by water have remained prime real estate for many centuries. Other, mostly smaller, prehistoric settlements are located elsewhere on the island where good access was offered to important food resources.

The earliest known Native American occupation of Jekyll Island was by an early foraging culture associated with the St. Simons phase. Dating to as early as 2400 B.C., these people may have lived in permanent settlements used as central bases for collecting estuarine, riverine, and oak-forest food resources during a time of rising sea levels and evolving ecosystems. Overall population density was low all along the coast, with groups living on the barrier islands in settlements atop and around shell rings (large ring-shaped mounds of oyster shells and other food refuse) and along freshwater rivers on top of large shell mounds (which also were deposits shell and other refuse). Occupation was concentrated on the northern end of Jekyll Island at this time, perhaps the result of short-term visits by foraging groups from large nearby sites on St. Simons Island. However, the possibility exists that a shell ring may have been located along the northern edge of Jekyll Island in an area that now has been submerged by rising sea level and eroded by tidal actions and currents.

When sea level dropped to a temporary low-stand around 1,000 B.C., there were dramatic changes in the coastal ecosystem and St. Simons phase settlements were disrupted and their populations dispersed. An archaeological culture known as the Refuge phase then developed along the coast, perhaps representing descendents of the St. Simons phase groups, but no sites of this period have been recorded on Jekyll Island.

Occupation resumed on Jekyll Island sometime between roughly 500 B.C. and A.D. 700. Probably the first to resettle the island were small bands of semi-nomadic hunters-fishers-gatherers who were seasonal visitors to the island during the Deptford phase. These people overlapped with others of a different cultural tradition known as Swift Creek, marked by groups who immigrated to the coast from inland areas of Georgia. The largest identified Swift Creek settlement was located in the interior of the island and contained an earthen burial mound.

Sporadic occupation on the island occurred during the following Wilmington phase, beginning about A.D. 700 and continuing for some 300 years. Very little is known about the genesis of this culture and its adaptive patterns anywhere along the Georgia coast. It is suspected that small residential groups visited the island intermittently during this time for hunting, fishing, and gathering purposes.

Intensive Native American settlement occurred on Jekyll Island during the Savannah phase, beginning about A.D. 1000 and perhaps continuing until Spanish contact. This was associated with large populations who lived in permanent villages and had a mixed economy based upon horticulture (growing maize, beans, and squash) along with substantial reliance on estuarine and oak forest resources. A central adaptive characteristic of this socially and politically complex culture was the periodic movement of family groups from their villages during the year to harvest seasonally available resources in other areas. The prehistoric archaeological sites at the Horton House and Millionaires Village date primarily to the Savannah phase and, although severely disturbed in places by historical construction activities, they are two of the largest and most complex Native American settlements on Jekyll Island.

Little information is available about Native American occupation on Jekyll Island during the early historic period. The island was known to the Spaniards as the Isla de Ballenas (Island of Whales) and while 17th-century Franciscan missions among the Mocama natives evidently were located to the north on St. Simons Island and to the south on Cumberland Island, none were reported on Jekyll Island. However, archaeological evidence indicates there was a native presence on the island during the 16th and 17th centuries. Irene phase and Mission period native pottery types, more common at sites associated with the Guale in areas north of Jekyll Island, are rare but present at some of Jekyll’s archaeological sites. Pottery vessels associated with the Mocama in more southern areas of the Georgia coast appear to be very similar to earlier Savannah phase wares, suggesting the possibility that some sites on Jekyll Island now assigned to the late prehistoric period may contain materials that actually reflect Native American occupations during the Spanish Mission period.

Only the barest of details about Jekyll Island’s Native American past are known and much remains to be learned about this heritage. Archaeologists now have many more questions than they do answers. Buried beneath the feet of visitors to Jekyll Island is a complex and multidimensional puzzle of archaeological evidence, each piece an irreplaceable clue about the lives of people in the distant past who once called this island their home. As archaeological methods and scientific techniques advance, more and more will be learned about this hidden past and our lives in the present will be enriched by a better understanding of that heritage. However, the pieces of our puzzle are fragile and once destroyed are forever lost. In recognition of their importance to current and future generations, archaeological sites of Jekyll Island are protected under Georgia laws and Federal statutes, with civil and criminal penalties for their destruction or disturbance.

Profile_09_Jekyll_tourism_ad

An artifact of Jekyll Island’s history of tourism.

Jekyll Island, owned by the people of Georgia and managed on their behalf by the Jekyll Island Authority, is a natural and cultural treasure to be both enjoyed and protected. Visitors to our remarkable island should be aware of the past hidden beneath their feet, marvel at its mysteries and untold stories, always act to sustain rather than disturb it, and walk away as advocates for archaeological preservation. The past is present on Jekyll Island and its legacies precious.

Building better climate change models

Ranasinghe_art_title_bannerFact: Georgia has many archaeological sites along the coast at sea level or only a few feet above sea level.

Fact: Scientists have measured a global rise in sea level over the last few years.

Fact: Scientists say the sea level will continue to rise.

The question: how much will it rise?

Why do we ask this question on the Society for Georgia Archaeology’s website? Because members of the society are concerned about the impact a sea level rise will have on coastal archaeological sites. One type of coastal site is prehistoric shell mounds, that is, mounds of shells discarded by ancient diners. Other coastal archaeological sites are historic buildings like lighthouses and fishing piers and docks.

So, along with other scientists, archaeologists look to research on changes in the sea level and the impact it will have on the shoreline. This means we look to models, or scientific predictions, of how the sea level will rise, both how much and how.

Modeling such a complex situation is very difficult. A model in this sense is a carefully described if-then assessment of the factors involved, and how they interact. For example, if rainfall increases, or if temperatures increase, or if desertification increases, THEN the effect is…whatever. A robust model will incorporate many, many factors, and describe how these factors are interrelated, or how changes in one will cause changes in others.

In a recent editorial article called “Rising seas and retreating coastlines” in the professional journal Climatic Change, and available free online, Roshanka Ranasinghe and Marcel J.F. Stive discuss what we need to generate a good model for predicting climate change:

A robust solution to the problem [that is, modeling climate change] lies in comprehensive bottom–up (small-scale, process-based) and top–down (large-scale, behavior-based) numerical models. Once comprehensively validated by field data, such numerical models can be strategically applied to determine quantitative forcing-response relationships of complex, non-linear coastal processes. These relationships can then be aggregated and/or parameterized and embedded into a robust and easy-to-use numerical model which accounts for at least the primary physical processes governing coastal recession. (page 467)

There are a lot of Big Words there!

So, what do these sentences mean?

The first sentence means that a good model will take into account both local, small-scale factors (e.g., the angle of an individual island relative to offshore currents) and large-scale factors (e.g., widescale changes in landuse patterns so that vegetation cover increases).

The second sentence is a recommendation that the model be cross-checked with actual field data. In other words, it’s not enough to make a model, but a good model should be checked against data we already have to make sure they fit the model. This also makes the model more robust.

The last sentence recommends taking the factors and the existing data and incorporating them into a numerical or mathematical model that includes the factors usually discussed—like temperature, rainfall, and landuse changes—and also includes coastline processes including the impact of waves along the shore, and how sediment is transported along the shoreline.

This last is probably something you’ve not heard about with regard to the climate change debate. Still, the recommendation to include how sediments move, and how this affects landforms does seem important. After all, as the water level rises, this is the place it contacts land, and this is the place where the higher levels will change the land.

What other factors do you think are important in modeling climate change?

This website has another, older story on climate change and Georgia archaeology; find it here.

How did climate change affect Pleistocene megafauna?

Did people kill off Pleistocene megafauna in North America, or were those species done in by climate shifts? Or…?

This question is still not answered unambiguously.

However, research by Jacquelyn Gill of the University of Wisconsin—Madison shows that neither scenarios is probable based on fossil pollen, charcoal and dung fungus spores that date to just after the ice retreated. Neither the mass extinction model, based on heavy hunting, nor simple climate and thus habitat change matches the data she and colleagues Stephen T. Jackson (University of Wyoming), Katherine B. Lininger (University of Wisconsin—Madison), and Guy S. Robinson (Fordham University) have marshalled.

According to Terry Devitt’s story (19 November 2009) on the University of Wisconsin—Madison website:

The decline of North America’s signature ice age mammals was a gradual process, the Wisconsin researchers explain, taking about 1,000 years. The decline in the huge numbers of ice age animals is preserved in the fossil record when the fungal spores disappear from the record altogether: “About 13.8 thousand years ago, the number of spores drops dramatically. They’re barely in the record anymore,” Gill explains.

Devitt continues:

While both the extinction of North America’s ice age megafauna and the sweeping change to the landscape are well-documented phenomena, there was, until now, no detailed chronology of the events that remade the continent’s biological communities beginning about 14.8 thousand years ago. Establishing that the disappearance of mammoths, giant beavers, ground sloths and other large animals preceded the massive change in plant communities, promises scientists critical new insight into the dynamics of extinction and its pervasive influence on a given landscape.

Archaeologists are often confronted with this situation: how do we get data on human behavior or the human situation, when we don’t have it directly from the archaeological record of human occupations? This research by Gill and her colleagues shows one solution developed to help understand the ecological situation in interior North America early in human occupation of the continent.

Stand by for more data….

Climate change and Georgia’s archaeological resources

coastal_sunset_banner

In mid-June 2009 the government of the USA, through the United States Global Change Research Program (USGCRP), released an authoritative assessment of national and regional impacts of global climate change called “Global Climate Change Impacts in the United States.” This initiative was mandated by Congress in 1990 to generate “a comprehensive and integrated United States research program which will assist the Nation and the world to understand, assess, predict, and respond to human-induced and natural processes of global change.”

In the Southeast region, including Georgia, we are warned to expect:

Effects of increased heat include more heat-related illness; declines in forest growth and agricultural crop production due to the combined effects of heat stress and declining soil moisture; declines in cattle production; increased buckling of pavement and railways; and reduced oxygen levels in streams and lakes, leading to fish kills and declines in aquatic species diversity.

In addition, we are told:

Sea-level rise is projected to accelerate, increasing coastal inundation and shoreline retreat. The intensity of hurricanes is likely to increase, with higher wind speeds, rainfall intensity, and storm surge height and strength.

So, think. What will the effect be on our archaeological heritage?

Rising sea levels over the last 20K years have already inundated archaeological remains on what is now underwater on the continental shelf. If the seas rise further, more lands will be inundated, and Georgia’s shell rings and coastal island sites will be threatened. Increased rainfall will increase the potential for erosion and seasonal flooding, and both can damage our hidden archaeological resources, like buried prehistoric villages and abandoned historic farm sites.

coastal_island_pool_view

The Southeast Fact Sheet also notes:

Ecosystems provide numerous important services that have high economic and cultural value in the Southeast. Climate change may result in abrupt changes to these ecosystems, such as hurricane-induced sudden loss of landforms that serve as storm surge barriers and homes for coastal communities.

The Executive Summary for the entire assessment notes:

These climate-related changes are expected to continue while new ones develop. Likely future changes for the United States and surrounding coastal waters include more intense hurricanes with related increases in wind, rain, and storm surges (but not necessarily an increase in the number of these storms that make landfall), as well as drier conditions in the Southwest and Caribbean. These changes will affect human health, water supply, agriculture, coastal areas, and many other aspects of society and the natural environment.

What positive and negative effects will these changes in the global climate make to archaeological resources?

Click here to visit the USGCRP website to read about this program and download this report and other information.

Click here to go to the National Science Foundation’s website, where you can download their 2009 report “Solving the Puzzle: Researching the Impacts of Climate Change Around the World.”

Reconstructing the Past: Archaeology and Experimentation

Archaeologists seeking to reconstruct past lifeways rely for their interpretations on the timeworn remains of ancient cultures for guidance; here in our humid Georgia climate, we are further disadvantaged since often only the inorganic residues of prehistoric culture remain. The study of stone tools, sherds of pottery, and the scant remnants of organic items and foods have helped to reconstruct much of the detail of aboriginal life since the arrival of people at the end of the Ice Age. But, unlike our counterparts in arid regions who are able to examine directly numerous organic artifacts preserved in dry caves and rock shelters, experimental archaeologists working in the Southeast are not rigidly bound to a list of facts about the material culture of the native peoples; we seek, at best, to present a range of available technological possibilities. These possibilities extend beyond the reconstruction of material archaeological remains; by combining aspects of archaeology, ethnography, and natural history, a world of organic materials normally hidden from the archaeologist’s trowel emerges. Rarely are we fortunate enough to glimpse the artistry of fibercraft, basketry, and woodworking that doubtless flourished in the prehistoric Southeast. Several flooded sites in Florida have yielded substantial organic remains; we believe that similar objects were probably commonly in use in what is now Georgia.

Such interpretive freedom is a mixed blessing since, on the one hand, one may experiment with ideas and adjust perceptions of prehistory; on the other, one must be attentive to the realities of Stone Age life provided by archaeology, and thus rein in unrealistic ideas before they wander too far afield. To the informed student of primitive technology falls the task of responsibly filling in gaps in our knowledge by recognizing, using, and documenting the wealth of possible material resources in our environments.

Starting with the oldest identifiable culture, the following text covers the next 12,000 years, from the long periods of hunting and gathering known as the Paleoindian and Archaic periods, to the early horticulturists of the Woodland period, and the maize-producing agriculturalists of the Mississippian period, ending with the arrival of Europeans in recent times. While some traditional crafts are still practiced by Indians of the Southeast, much of the accumulated knowledge of the past 12,000 years was lost through the unfortunate acts of the Europeans who ultimately came to dominate North America.

ga_chronology_sj

Paleoindian: 12,000-10,000 BP

While a growing body of evidence suggests that people inhabited the New World by about 13,500 years ago (often referred to as the Pre-Paleoindian period), the first definable, widespread culture appeared around 12,000 years ago at the end of the last Ice Age. The dry, windswept landscape was strongly shaped by, but just out of reach of, the massive continental ice sheet that lay a few hundred miles to the north. The coastal lowlands extended far beyond the present coast, because massive amounts of the ocean’s water locked up in polar ice sheets lowered sea levels. In this landscape of boreal forest and grassland, these earliest Americans coexisted briefly with numerous Ice Age mammals that are now extinct. In the Southeast were found wooly mammoth, mastodon, and ancient bison, as well as living species including caribou, elk, and deer.

Paleoindian sites are rare and their distinctive projectile points are scarce, often found in the Southeast only as isolated artifacts. Paleoindians are believed to have migrated across the land bridge connecting Siberia and Alaska (a consequence of lower sea levels during glacial times). Their lifestyle was one of hunting and gathering, and the few well preserved kill sites discovered in the Western US indicate an emphasis on large game. This is likewise reflected in their tools: wellmade projectile points, sometimes bearing a characteristic channel flake removed lengthwise from the base (fluted points); long narrow flake blades struck from prepared cores; and unifacial scrapers manufactured by the removal of many small flakes from the edge of a larger flake, thus forming a beveled planing tool. This technology is quite similar to that of the Old World Upper Paleolithic, and attests to the origins of the earliest inhabitants of the New World. Because winters were severe, access to good stone was limited, and the animals these people hunted were often large and dangerous, the stone tools of the Paleoindians were made from the highest quality materials available and were used for as long as possible. To get the most possible use from them, they were often resharpened many times before being discarded.

The specific hunting weapons used by Paleoindians are the topic of speculation; while some projectile points are large enough to be used as tips for heavy thrusting or stabbing spears, most of those found in the Southeast are small enough for use on lighter projectiles thrown with a spear thrower. No direct evidence for spear throwers has been found, and the scarcity of Paleoindian sites does not favor the recovery of an actual spear thrower, yet the Old World flavor of the artifact assemblage favors the presence of this weapon for the pursuit of large, dangerous, and now largely extinct prey.

Archaic: ca. 10,000-3000 BP

Early Archaic: ca. 10,000-8000 BP

At the close of the Ice Age about 10,000 years ago, a people who once lived by hunting a variety of large game were forced to alter their way of life in the face of a changing climate. In the Southeast, the extinction of mammoth, mastodon, and the ancient bison, as well as the disappearance from the region of modern species such as elk and caribou, left the whitetail deer as the principal large game animal. Along with deer, the new climate allowed forests with the same species we see today to flourish; they were dominated by oak, hickory, chestnut (now almost gone due to disease), and pine. Focusing on deer, black bear, small game, and mast (nuts) from the mature forests, Early Archaic peoples adopted a generalized hunting and gathering lifestyle with a greater reliance upon plant foods than their Paleoindian ancestors.

Although population increased rapidly in the new, temperate environment, Early Archaic peoples still ranged far and wide, often using major river valleys as territorial corridors for foraging and travel between the Coastal Plain and the interior. Following the example set by their Paleoindian ancestors, they sought high-quality material for their stone tools. Well-made, easily maintained tools were a necessity for highly mobile bands of hunter-gatherers; yet their mobility allowed them to choose the best material from within their territory. The bow was unknown to these people; the primary weapon remained the spear-thrower (or atlatl), and the side- and corner-notched stone points they used are not really arrowheads at all. They are, in fact, tips for darts thrown with the atlatl. Using spear throwers to hunt swift game, hunters equipped lightweight darts with detachable foreshafts that allowed the stone points to serve double duty as both knife and projectile point, and also permitted easy replacement of an accidentally broken tip.

Middle Archaic: ca. 8000-5500 BP

By about 8000 years ago, a minor climatic shift (called the Altithermal) imposed its effect upon the increasing human population of the Southeast. Warmer and dryer conditions west of the Appalachians influenced people to concentrate into river valleys, while the wetter climate that prevailed to the east resulted in a general migration into the uplands. Perhaps in response to their growing population as well as climatic change, Middle Archaic peoples increased their reliance upon plant foods. Their preference for locally available stone from which to make their deceptively simple, contracting-stem projectile points indicates that they foraged in smaller territories than their ancestors. Using simple chipped-stone axes to fell modest-sized trees needed for shelter and tools, they continued to forage in much the same way as their Early Archaic predecessors. During the Middle Archaic, stone spear-thrower weights first appear, an innovation that improved the weapon’s performance. Although we suspect spear throwers had been used since the end of the Paleoindian times (and probably before), perforated stone weights provide the best hard evidence for the existence of this weapon in the Southeast.

Late Archaic: ca. 5500-3000 BP

Although many of the trends of the Early and Middle Archaic continued into the Late Archaic, it differed from them in some significant ways. In addition to relatively large stemmed projectile points, the Late Archaic was characterized by the first fired clay ceramics in North America. Plant fiber added to the raw clay strengthened (tempered) the unfired vessel. The fiber burned during the firing process, yielding a sturdy vessel bearing the impressions of plant fibers. Fiber-tempered pottery appears around 4500 BP in the Coastal Plain of Georgia and South Carolina.

More commonly found in the southern Appalachians and piedmont of northern Georgia and adjacent states are fragments of soapstone bowls. Contrary to popular belief, these carved stone bowls actually appear after the invention of ceramic pottery, about 3500 BP. The appearance of ceramic and stone vessels signaled the beginning of the end of the 8500 year-old hunting and gathering way of life that had endured since the earliest humans arrived in North America. The invention of pottery indicates a more sedentary lifestyle that included an early form of horticulture for cultivating squash (Cucurbita pepo) and gourds (Lagenaria siceraria). For in-depth information about fibertempered ceramics, soapstone bowls, and other Late Archaic cooking technology, see Kenneth E. Sassaman’s Early Pottery in the Southeast: Tradition and Innovation in Cooking Technology (1993).

The transition from hunting and gathering to sedentism is further evidenced by intensive gathering of shellfish for food along many of the rivers in the Southeast. This practice left immense piles of discarded shell, which sometimes extend for hundreds of meters along creeks and estuarine margins. Increased sedentism likewise brought about changes in axe technology. The simple chipped stone axes that well-served the needs of earlier peoples were refined to suit the rigors of house construction and limited land clearing. While hafting of Late Archaic grooved axes was apparently similar to earlier flaked stone types (a flexible twig or splint wrapped around a groove or constriction), greater durability and maintainability were accomplished by pecking and grinding the surface, and polishing the edge.

Woodland: ca. 3000-1100 BP

By about 3000 years ago, the horticulture experiments begun by Late Archaic peoples became a way of life for people of the Woodland period. Despite the name, Woodland peoples were perhaps less dependent upon the forest environments of the Southeast than their predecessors. Taking the refinements of stone axe technology a step further, the grooved axes of an earlier time gave way to a polished tapered form called a celt. Instead of fastening a flexible sapling around a groove to form a handle, the blade was fitted into a hole in the end of a club-like handle. With friction holding the celt blade securely in its haft, the club-like handle provided additional weight and momentum. This allowed Woodland farmers to clear yet larger areas of land for villages and fields.

During the early part of the Woodland period, corn (maize) had been introduced from its Mesoamerican homeland, but food production based almost entirely on native cultigens—mainly lamb’s quarters (Chenopodium berlandieri), marsh elder (Iva annua), sunflowers (Helianthus annuus), maygrass (Phalaris caroliniana), knotweed (Polygonum sp.), as well as squash and gourds. Although Woodland peoples probably retained some of the hunting and gathering mobility of their ancestors, large-scale production of native seed plants provided a margin of security against food shortages during the lean months of late winter and early spring. Starchier than most wild plant foods, cultivated foods require longer cooking times. As dependence on these foods increased, so too did the demands placed upon pottery. Heavy fiber-tempered pottery gradually was replaced by thinner, more refined sand- and grittempered wares that made a lighter, sturdier vessel.

As they struggled with the new challenges of sedentism, food production, and territoriality, Woodland peoples experimented with ways of adapting their weapons to new circumstances. Surplus food afforded the luxury of remaining longer in one place, and as villages grew, competition for arable land and other resources was inevitable. Also, ambush hunting in food plots became a practical alternative to long-distance hunting forays, while serving to protect increasingly valuable food crops from animals. The venerable spear thrower—an Ice Age legacy of hunters and gatherers in nearly every part of the world— became obsolete in the face of the need for efficiency, stealth, and increased rate of fire. Although requiring a greater initial labor investment than the spear thrower, the bow—one of the most recognizable symbols of native ingenuity—became the weapon of choice for hunting and warfare. And sedentism—the practice of living more or less permanently in one place—allowed adequate storage and seasoning of bowstaves, a cumbersome commodity requiring shelter.

As with many technological innovations, the core idea of string-and-wood propelled projectiles did not spring suddenly onto the stage of prehistory; indeed, the bow was merely a technological refinement of flexible spear-thrower technology. During the developmental phase of the technology, simple, light draw-weight bows could be constructed easily from readily available materials and used for fishing or hunting small game. While a mobile hunter/gatherer could easily carry additional twofoot long wooden blanks from which to produce atlatls, the same wanderer, in seeking to make a more substantial weapon, could scarcely afford to travel about the countryside with a five-foot long nonfunctional bowstave; nor could he leave it behind to be potentially exposed to the destructive elements of the humid Eastern US. In other words, archaeologists think Woodland peoples had to stay in one place long enough for the bowstave to season, before they could finish the bow.

As in other parts of the world, the advent of agriculture and sedentism, along with necessity, resulted in the development of the bow-and-arrow, the ultimate Neolithic weapon. During the transition from spear-thrower to bow, a profusion of projectile point designs were tested as hunters sought lighter, faster projectiles. Dominated by a variety of small stemmed types and relatively large triangular points, the triangular style ultimately succeeded all others in the Southeast. By the end of the Woodland period, triangular projectile points had become much smaller. Although often called “bird points” in the mistaken belief that only small game could be taken with such a small projectile point, these tips are among the few types that may be confidently called arrowheads. Attached to rivercane arrows launched from powerful bows by skilled archers, the tiny arrow points proved fatal to the largest creatures of the Eastern Woodlands, whether deer, bear, or human.

The Woodland Period also signals the beginning of the construction of earthen mounds. Sedentism brought with it the necessity for greater social organization, and also permitted the accumulation of material goods. From this came the concept of status, and by Middle Woodland times some individuals were interred in conical earthen mounds, often with elaborate funerary items and trade goods acquired from great distances.

Mississippian: ca. AD 900-1540

Corn—or more correctly, maize—is known only sporadically in the preceding Woodland period, and certainly not until late Woodland times is it present in sufficient quantity to qualify as a significant food source across the Southeast. Yet by the time new varieties of maize as well as new ideas arrived from Mexico around AD 900, the cultural mechanisms for large-scale food production initiated in the Woodland period were firmly in place. With nearly 2000 years of horticulture experience, maize claimed a central place in Southeastern Native American culture, alongside beans, squash, sunflowers, jerusalem artichokes, gourds, and tobacco.

The Mississippian period, so called because of the extensively cultivated bottomlands of the Mississippi River, represents the most complex political organization and extensive social stratification the Woodland tradition of tribe- or clan-based villages, the Mississippi River drainage and much of the Southeast was dominated by an array of polities (or political units) known as chiefdoms. Though much of our knowledge about the geographical size of chiefdoms is lost, it is believed that some (such as Coosa, in northwestern Georgia) were quite large. Each chiefdom consisted of several villages, each of which was answerable to a central (paramount) chief or leader believed to have god-like powers, who resided on the flat-topped earthen mound, often with one or two other influential leaders living atop lesser mounds in the village compound. The head man exacted agricultural tribute from his subjects, and, during lean times he oversaw the redistribution of food and other goods to his subjects. In return, the people were required to provide labor to the chief. They constructed his house upon the spot where his predecessors had lived; upon his death, his subjects often buried him beneath the dirt floor of his mound-summit residence. Then, in accordance with custom, the house was often burned. In preparation for the new heir, a new mantle of earth was added to the mound, and a new house constructed. Thus were the great mounds of the Mississippian Indians constructed.

In addition to the chiefly mounds, the village compound often included residential houses with walls constructed of upright posts interwoven with cane or twigs, and covered with clay, roofed with thatch or bark; a council house, which occasionally took the form of a semi-subterranean earthlodge; and a central plaza, which served as a gathering place and game court. In the plaza, the men played chunkey, a game wherein spears or sticks are thrown at a rolling, wheel-like stone (a chunkey stone), often accompanied by copious gambling. The plaza was also used as a ball court for the ball game, the southern equivalent of lacrosse. A rough (and occasionally fatal) enterprise, the ball game was known as “little brother of war,” and was used to settle disputes between hostile groups as a way of avoiding outright warfare.

The chiefdom was a formidable political and military force, and Mississippian towns, enclosed in their palisades of sharpened, upright timbers, often contained populations numbering in the thousands. Equipped with powerful bows, their arrows tipped with tiny triangular stone points, garfish scales, antler, or often just sharpened cane alone, warriors defended their towns and villages. But they were entirely unprepared for that which was to come.

Historic: ca. AD 1540-1840

With the entrance of Hernando De Soto into the interior of the Southeast in 1539, the region’s history was forever changed (Hudson 1997). De Soto’s initial exploration was followed by more expeditions, first by other Spaniards (Hudson 1990), and then by the English and French (Hudson and Tesser 1994). Iron tools and other trade goods, diseases to which the natives were not immune, and the inherent disadvantages faced by Indians who survived European diseases and depredations all contributed to the devastation of Indian culture. Some groups, like the Muskogee-speaking Creeks further south, maintained considerable cultural identity, although still dependent upon European trade goods. The Cherokees of northern Georgia, however, attempted a different strategy. By the late 1700s their material culture differed little from that of their Euroamerican neighbors. Even with log houses, farms, orchards, slaves, porcelain, and a written language, they suffered much the same fate as their native kinsmen. Throughout the 1830’s they were removed to the Oklahoma Territory by decree of US President Andrew Jackson, and their homes and land were seized by white settlers. The rest is literally “history.”

References Cited

Bense, Judith A.
1994 Archaeology of the Southeastern United States: Paleoindian to World War I. Academic Press, San Diego.

Hudson, Charles
1976 Southeastern Indians. University of Tennessee Press, Knoxville.
1990 The Juan Pardo Expeditions: Exploration of the Carolinas and Tennessee, 1566-1568. Smithsonian Institution Press, Washington, DC.
1997 Knights of Spain, Warriors of the Sun: Hernando de Soto and the South’s Ancient Chiefdoms. University of Georgia Press, Athens.

Hudson, Charles, and Carmen Chaves Tesser (editors)
1994 The Forgotten Centuries: Indians and Europeans in the American South, 1521-1704. University of Georgia Press, Athens.

Sassaman, Kenneth E.
1993 Early Pottery in the Southeast: Tradition and Innovation in Cooking Technology. University of Alabama Press, Tuscaloosa.

Scott Jones is a primitive technologist and replicative specialist who conducts frequent hands-on presentations, including programs for school children, through his firm, Media Prehistoria.
This summary is drawn from his article in ‚“Resources at Risk,” a 2001 issue of Early Georgia. In this article, titled “An Introduction to the Prehistory of The Southeast or, “They were Shootin’em as Fast as They Could Make ’em!” and Other Popular Misconceptions about the Prehistoric Southeast,” Mr. Jones sought to convey, as he put it, “a sense of context and continuity to those who are interested in the flow of time and events.”