Spiro Mounds

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Spiro Mound Group
Spiro Aerial HRoe 2016.jpg
Artists conception of Spiro Mounds as seen from the west.
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Nearest city Spiro, Oklahoma
Coordinates 35°18′43″N94°34′07″W / 35.31194°N 94.56861°W / 35.31194; -94.56861 Coordinates: 35°18′43″N94°34′07″W / 35.31194°N 94.56861°W / 35.31194; -94.56861
Area Le Flore County
Architectural styleMississippian
NRHP reference # 69000153
Added to NRHPSeptember 30, 1969 [1] [2]

Spiro Mounds (34 LF 40) [3] is a major Northern Caddoan Mississippian archaeological site located in present-day Eastern Oklahoma. The 80-acre site lies near the Arkansas River, seven miles north of the town of Spiro.

Smithsonian trinomials are unique identifiers assigned to archaeological sites in many states in the United States. They are composed of one or two digits coding for the state, typically two letters coding for the county or county-equivalent within the state, and one or more sequential digits representing the order in which the site was listed in that county. The Smithsonian Institution developed the site number system in the 1930s and 1940s. The 48 states then in the union were assigned numbers in alphabetical order. Alaska was assigned number 49 and Hawaii was assigned number 50 after those states were admitted to the union. There are no Smithsonian trinomial numbers assigned for the District of Columbia or any United States territories.

Caddoan Mississippian culture prehistoric Native American culture in south-eastern United States

The Caddoan Mississippian culture was a prehistoric Native American culture considered by archaeologists as a variant of the Mississippian culture. The Caddoan Mississippians covered a large territory, including what is now Eastern Oklahoma, Western Arkansas, Northeast Texas, and Northwest Louisiana. Archaeological evidence that the cultural continuity is unbroken from prehistory to the present; that the direct ancestors of the modern Caddo Nation of Oklahoma included the speakers of the Caddo and related Caddo language in prehistoric times and at first European contact, is unquestioned today.

Mississippian culture Mound-building Native American culture in Midwestern, Eastern, and Southeastern United States

The Mississippian culture was a mound-building Native American civilization archeologists date from about 800 CE to 1600 CE, varying regionally.


Between the 9th and 15th centuries, the local indigenous people created a powerful religious and political center, culturally linked to the Southeastern Ceremonial Complex, also called the Mississippian Ideological Interaction Sphere (MIIS). Spiro was a major western outpost of Mississippian culture, which dominated the Mississippi Valley and its tributaries for centuries. Spiro Mounds is under the protection of the Oklahoma Historical Society and is listed on the National Register of Historic Places. [4]

Southeastern Ceremonial Complex regional similarity of Mississippian cultures

The Southeastern Ceremonial Complex, aka S.E.C.C., is the name given to the regional stylistic similarity of artifacts, iconography, ceremonies, and mythology of the Mississippian culture that coincided with their adoption of maize agriculture and chiefdom-level complex social organization from 1200 to 1650 CE. This development appears to have no direct links to Mesoamerica, but developed independently. This ceremonial complex represents a major component of the religion of the Mississippian peoples, and is one of the primary means by which their religion is understood.

Oklahoma Historical Society historical preservation agency in the state of Oklahoma

The Oklahoma Historical Society (OHS) is an agency of the government of Oklahoma dedicated to promotion and preservation of Oklahoma's history and its people by collecting, interpreting, and disseminating knowledge and artifacts of Oklahoma. The mission of the OHS is to collect, preserve, and share the history and culture of the state of Oklahoma and its people.

National Register of Historic Places federal list of historic sites in the United States

The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation for their historical significance. A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred preserving the property.

In the 1930s during the Great Depression, treasure hunters bought the rights to tunnel into Craig Mound—the second-largest mound on the site—to mine it for artifacts. They exposed a hollow burial chamber inside the mound, a unique feature containing some of the most extraordinary pre-Columbian artifacts ever found in the United States. These included works of fragile, perishable materials: textiles and feathers that had been uniquely preserved in the conditions of the closed chamber. The treasure hunters sold the artifacts they recovered to art collectors, some as far away as Europe. Some of these artifacts were later returned to regional museums and the Caddo Nation, but other artifacts have never been accounted for. This site has been significant for North American archaeology since the 1930s, especially due to its many preserved textiles and wealth of shell carving.

Great Depression 20th-century worldwide economic depression

The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, beginning in the United States. The timing of the Great Depression varied across nations; in most countries it started in 1929 and lasted until the late-1930s. It was the longest, deepest, and most widespread depression of the 20th century. In the 21st century, the Great Depression is commonly used as an example of how intensely the world's economy can decline.


The history of Spiro is typically divided into archaeological phases:

Residential construction at Spiro decreased dramatically around 1250, and people settled in nearby villages, such as the Choates-Holt Site to the north. Spiro was used as a ceremonial and mortuary center through 1450. [6] The mound area was abandoned about 1450, although nearby communities persisted until 1600. [4] The cultures following in the wake of Spiro were less complex and hierarchical. [7]

Mounds and plaza area

A reconstructed house. Grass-thatched roofs were typical of the later, historic Wichita and Caddo, but their houses were round with high-pitched roofs. House at spiro mounds.jpg
A reconstructed house. Grass-thatched roofs were typical of the later, historic Wichita and Caddo, but their houses were round with high-pitched roofs.

Mississippian culture spread along the lower Mississippi River and its tributaries between the 9th and 16th centuries. The largest Mississippian settlement was Cahokia, the capital of a major chiefdom that built a six-mile-square city east of what is now St. Louis, Missouri in present-day Southern Illinois. Mississippian culture ranged from the Great Lakes to the Gulf Coast, and along the Ohio River and into both the lowland and mountain areas of the Southeast. Mississippian settlements were known for their large platform earthwork mounds (usually truncated pyramids) surmounted by temples, the houses of warrior kings and priests, and the burial houses of the elite. The mounds were arranged around large, flat plazas believed to be used for ceremonial community gathering and ritual games. Archaeological research has shown that Mississippian settlements such as Cahokia and Spiro took part in a vast trading network that covered the eastern half of what is now the U.S. and parts of what is now the Western U.S. as well.

The Spiro site includes twelve earthen mounds and 150 acres of land. [4] As in other Mississippian-culture towns, the people built a number of large, complex earthworks. These included mounds surrounding a large, planned and leveled central plaza, where important religious rituals, the politically and culturally significant game of chunkey, and other important community activities were carried out. The population lived in a village that bordered the plaza. In addition, archaeologists have found more than twenty related village sites within five miles of the main town. Other village sites linked to Spiro through culture and trade have been found up to a 100 miles (160 km) away.

Spiro has been the site of human activity for at least 8000 years. It was a major Mississippian settlement from 800 to 1450. [4] The cultivation of maize allowed accumulation of crop surpluses and the gathering of more dense populations. It was the headquarters town of a regional chiefdom, whose powerful leaders directed the building of eleven platform mounds and one burial mound in an 80-acre (0.32 km2) area on the south bank of the Arkansas River. The heart of the site is a group of nine mounds surrounding an oval plaza. These mounds were the bases of the homes of important leaders or formed the foundations for religious structures that focused the attention of the community. Brown Mound, the largest platform mound, is located on the eastern side of the plaza. It had an earthen ramp that gave access to the summit from the north side. Here, atop Brown Mound and the other mounds, the town's inhabitants carried out complex rituals, centered especially on the deaths and burials of Spiro's powerful rulers.

Archaeologists have shown that Spiro had a large resident population until about 1250. After that, most of the population moved to other towns nearby. Spiro continued to be used as a regional ceremonial center and burial ground until about 1450. Its ceremonial and mortuary functions continued and seem to have increased after the main population moved away.

The Great Mortuary

Craig Mound Spiro Craig Mound HRoe.jpg
Craig Mound

Craig Mound – also called "The Spiro Mound" – is the second-largest mound on the site and the only burial mound. It is located about 1,500 feet (460 m) southeast of the plaza. A cavity created within the mound, about 10 feet (3.0 m) high and 15 feet (4.6 m) wide, allowed for almost perfect preservation of fragile artifacts made of wood, conch shell, and copper. The conditions in this hollow space were so favorable that objects made of perishable materials such as basketry, woven fabric of vegetal and animal fibers, lace, fur, and feathers were preserved inside it. In historic tribes, such objects have traditionally been created by women. Also found inside were several examples of Mississippian stone statuary made from Missouri flint clay and Mill Creek chert bifaces, all thought to have originally come from the Cahokia site in Illinois.

The "Great Mortuary," as archaeologists called this hollow chamber, appears to have begun as a burial structure for Spiro's rulers. It was created as a circle of sacred cedar posts sunk in the ground and angled together at the top like a tipi . The cone-shaped chamber was covered with layers of earth to create the mound, and it never collapsed. Some scholars believe that minerals percolating through the mound hardened the chamber's log walls, making them resistant to decay and shielding the perishable artifacts inside from direct contact with the earth. No other Mississippian mound has been found with such a hollow space inside it and with such spectacular preservation of artifacts. Craig Mound has been called "an American King Tut's Tomb."

Between 1933 and 1935, Craig Mound was excavated by an enterprise that had bought the rights from local landowners to excavate and to keep or sell the artifacts they recovered. Tunneling into the mound and breaking through the Great Mortuary's log wall, they found many human burials, together with their associated grave goods. They discarded the human remains and the fragile artifacts—made of textile, basketry, and even feathers—that were preserved in these extremely unusual conditions. Most of these rare and historically priceless objects disintegrated before scholars could reach the site, although some were sold to collectors. [8] When the commercial excavators finished, they dynamited the burial chamber and sold the commercially valuable artifacts, made of stone, pottery, copper, and conch shell, to collectors in the United States and overseas. Most of these valuable objects are probably lost, but some have been returned through donation and documented by scholars.

Funded by the Works Progress Administration (WPA), archaeologists from the University of Oklahoma excavated parts of the site between 1936 and 1941. The Oklahoma Historical Society established the Spiro Mounds Archaeological Center in 1978 that continues to operate. [4] The site is listed on the National Register of Historic Places and is preserved as Oklahoma's only Archeological State Park and only pre-contact Native American site open to the public.

Southeastern Ceremonial Complex

Anthropomorphic human headed avian plate from Spiro Spiro human headed avian plate HRoe 2012.jpg
Anthropomorphic human headed avian plate from Spiro

Spiro Mounds people participated in what archaeologists call the Southeastern Ceremonial Complex (SECC), a network of ceremonial centers sharing the Mississippian culture and similar spiritual beliefs, cosmology, ritual practices, and cult objects. The SECC was a vast trading network that distributed exotic materials for making ritual objects from all across North America. These included colored flint from New Mexico, copper from the Great Lakes, conch (or lightning whelk) shells from the Gulf Coast, and mica from the Carolinas. [9] Other Mississippian centers also traded in these prized resources, but Spiro was apparently the only one that acquired obsidian from Mexico. [10] Using these valued materials, Mississippian artists created exquisite works of art reflecting their cultural identity and their complex spiritual beliefs.

When commercial excavators dug into Craig Mound in the 1930s, they found many beautifully crafted ritual artifacts, including stone effigy pipes, polished stone maces, finely made flint knives and arrowpoints, polished chunkey stones, copper effigy axes, Mississippian copper plates (Spiro plates), mica effigy cut outs, elaborately engraved conch shell ornaments, pearl bead necklaces, stone earspools, wood carvings inlaid with shell, and specially made mortuary pottery. The conch shells were fashioned into gorgets and drinking cups engraved with intricate designs representing costumed men, real and mythical animals, and geometric motifs, all of which had profound symbolic significance. Spiro Mounds' ceremonial objects are among the finest examples of pre-Columbian art in North America.

Later, archaeologists recognized that the ritual artifacts at Spiro were similar to comparable objects excavated at other powerful Mississippian towns that also participated in the Southeastern Ceremonial Complex. These include Cahokia in Illinois, the largest Mississippian town; Etowah and Ocmulgee in Georgia; and Moundville in Alabama. In economic terms, Spiro seems to have been a gateway town that funneled valuable resources from the Great Plains and other western regions to the main Mississippian ceremonial centers farther east. In return, it received valuable goods from those other centers. Spiro's location on the Arkansas River, one of the Mississippi's principal tributaries, gave it access to the Mississippian heartland.

Spiro and other Mississippian towns clearly looked to the great city of Cahokia, in what is now southern Illinois, as a cultural model to be emulated. Located about 400 miles northeast of Spiro near the confluence of the Mississippi and Missouri Rivers, Cahokia was the largest and most impressive of all the Mississippian towns. Mineralogical analysis of some of the most beautiful stone effigy pipes found at Spiro, including the famous "Grizzly Man" or "Kneeling Rattler" pipe, have shown they came from Cahokia, based on the material from which they were made. [11] Cahokia also influenced the styles of the artifacts made at Spiro. Archaeologists have identified four distinct styles: the Braden Style characteristic of artifacts brought from Cahokia; and the Craig A, B, and C styles, which are local derivatives of the Braden Style. [11] [12]

Antonio Waring and Preston Holder first defined the Southeastern Ceremonial Complex in the 1940s, according to a series of distinct cultural traits. [13] Since the late 1980s, archaeologists have adopted a new classification scheme based on their greatly improved understanding of Mississippian cultural development. The new scheme divides the SECC into five periods, or horizons, each defined by the appearance of new ritual objects and cultural motifs connected with new developments in politics and long-distance trade. [14] Archaeologists have determined that Spiro was at the peak of its cultural importance in the 13th and 14th centuries.

Mississippian iconography

Engraved shell gorget from Spiro Mounds. The striped-center-pole, or axis mundi, divides the image in half. The cross and circle motifs also have symbolic meanings. Craig C style shell gorget Spiro HRoe 2005.jpg
Engraved shell gorget from Spiro Mounds. The striped-center-pole, or axis mundi, divides the image in half. The cross and circle motifs also have symbolic meanings.
Spiro Mounds shell gorget with spider motif, at Woolaroc Museum Woolaroc Spiro Mounds spider shell gorget.jpg
Spiro Mounds shell gorget with spider motif, at Woolaroc Museum

Archaeologists have tried in recent years to interpret the meaning of the ritual artifacts and artistic imagery found at Spiro and other Mississippian sites. While reaching firm conclusions about the meanings of works of art made centuries ago by people of an extinct culture is difficult, archaeologists have made some compelling interpretations by comparing Mississippian artistic imagery with the myths, religious rituals, art, and iconography of historic Native American groups.

One of the most prominent symbols at Spiro is the "Birdman," a winged human figure representing a warrior or chunkey player. Chunkey was a game played in the Mississippian period, but also in historic times by the Choctaw, Chickasaw, Cherokee, and other tribes throughout the Eastern Woodlands. Men played the game by rolling a stone disk for a considerable distance and then hurling spears as close as they could to the point where the stone stopped.[ citation needed ]

Another Spiro icon is the "Great Serpent," a being said to inhabit the Under World, the spiritual domain on the opposite side of the Mississippian universe. The Great Serpent is portrayed in Mississippian art with a serpent's body but also with wings or horns. Similar beings were the subject of myth in historic times among the Micmac, Huron, Kickapoo, Cherokee, Muscogee Creek, Caddo, and other Native American tribes, appearing in tribes of at least three major language families. The spiritual beings of the Under World were thought to be in constant opposition to those in the Upper World. Men had to fear these beings, according to Native American mythology, but they could also gain great power from them in certain circumstances.[ citation needed ]

Mississippian art also features the cedar tree or striped-center-pole motifs, which archaeologists have interpreted as the axis mundi , the point at which the three parts of the Mississippian spiritual universe come together: the Upper World, the Under World, and the Middle World where humans dwell. The cedar tree or the striped-center-pole is often found on engraved conch shell gorgets, with human or animal figures positioned on either side. The concept of an axis mundi — the point where different cosmic domains converge — is found in many cultures around the world. It is frequently represented as a tree (including the Tree of Life), since trees pass through the surface of the earth and connect the subsurface and the sky. The fact that the Great Mortuary at Spiro was built with cedar (or cedar elm) posts suggests that the burial chamber was meant to be a point of departure from one spiritual domain to another, as cedar was a sacred wood.[ citation needed ]

Archaeologists found that one of the conch shell cups from Craig Mound had a black residue in the bottom. This suggests that the Spiro people may have practiced a version of the Black Drink Ceremony, a purification ritual that was also performed in historic times by their descendants - the Southeastern tribes. Participants drank a tea made from the Yaupon Holly from conch shell cups. [15]

Caddoan Mississippians

Map of the Caddoan Mississippian culture and some important sites Caddoan Mississippian culture map HRoe 2010.jpg
Map of the Caddoan Mississippian culture and some important sites

Most authorities agree that the people of Spiro were Caddoan speaking, but their descendants in historic times are difficult to identify. Archaeologists speculate that the Caddo Confederacy, Wichita, Kichai, or non-Caddoan Tunica could be their descendants. However, the cultures of all these peoples, when encountered by the Spanish and French in the 16th and 17th centuries, were substantially different from that of Spiro. [16]

Under the Native American Graves Protection and Repatriation Act, the Caddo Nation of Oklahoma and the Wichita and Affiliated Tribes (Wichita, Keechi, Waco and Tawakonie) are recognized by the US Federal government and archaeologists as the cultural descendants of the builders of Spiro Mounds. [17]

When the Spanish conquistador Hernando de Soto led an expedition into what is now the Southeastern United States in the 1540s, he encountered Native American groups including the Tula people, who lived near the Arkansas River. The De Soto Expedition also encountered numerous Caddo villages. Composed of many tribes, the Caddo were organized into three confederacies, the Hasinai, Kadohadacho, and Natchitoches, which were all linked by similar languages.

At the time of de Soto's visit, the Caddoan peoples occupied a large territory. It included what is now Eastern Oklahoma, Western Arkansas, Northeast Texas, and Northwest Louisiana. Archaeologists have thought that the Caddo and related peoples had been living in the region for centuries and that they had their own local variant of Mississippian culture.

Recent excavations have revealed within that region more cultural diversity than scholars had expected. The sites along the Arkansas River, in particular, seem to have their own distinctive characteristics. Scholars still classify the Mississippian sites found in the entire Caddo area, including Spiro Mounds, as "Caddoan Mississippian". [18]

The Caddoan Mississippian region contained many towns in addition to Spiro, including the Battle Mound Site. Scholars have determined that Battle Mound, lying along the Great Bend of the Red River in Southwest Arkansas, was a larger site than Spiro. Little excavation has been done there to date. The Caddoan Mississippian towns had a more irregular layout of earthen mounds and associated villages than did towns in the Middle Mississippian heartland to the east. They also lacked the wooden palisade fortifications often found in the major Middle Mississippian towns. Living on the western edge of the Mississippian world, the Caddoan may have faced fewer military threats from their neighbors. Their societies may also have had a somewhat lower level of social stratification.

The Spiro people were probably speakers of one of the many Caddoan languages. [19] The Caddoan languages once had a broad geographic distribution, but many are now extinct. The modern languages in the Caddoan family include Caddo, Wichita, Kitsai, Pawnee, and Arikara languages. [20] Wichita and Kitsai are both extinct.

See also

Related Research Articles

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Etowah Indian Mounds archaeological site in Bartow County, Georgia

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Nodena Site

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Battle Mound Site

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Fourche Maline culture Woodland Period Native American culture

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Belcher Mound Site

The Belcher Mound Site (16CD13) is an archaeological site in Caddo Parish, Louisiana. It is located in the Red River Valley 20 miles north of Shreveport and about one-half mile east of the town of Belcher, Louisiana. It was excavated by Clarence H. Webb from 1959 to 1969. The site gives its name to a local phase of the Caddoan Mississippian culture, the Belcher Phase, which radiocarbon dates suggest lasted from 1400 to 1600 CE.

Gahagan Mounds Site

The Gahagan Mounds Site (16RR1) is an Early Caddoan Mississippian culture archaeological site in Red River Parish, Louisiana. It is located in the Red River Valley. The site is famous for the three shaft burials and exotic grave goods excavated there in the early twentieth century.

Mississippian stone statuary

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Mill Creek chert

Mill Creek chert is a type of chert found in Southern Illinois and heavily exploited by members of the Mississippian culture. Artifacts made from this material are found in archaeological sites throughout the American Midwest and Southeast. It is named for a village and stream near the quarries, Mill Creek, Illinois and Mill Creek, a tributary of the Cache River. The chert was used extensively for the production of utilitarian tools such as hoes and spades, and for polished ceremonial objects such as bifaces, spatulate celts and maces.

Mississippian culture pottery

Mississippian culture pottery is the ceramic tradition of the Mississippian culture found as artifacts in archaeological sites in the American Midwest and Southeast. It is often characterized by the adoption and use of riverine shell-tempering agents in the clay paste. Shell tempering is one of the hallmarks of Mississippian cultural practices. Analysis of local differences in materials, techniques, forms, and designs is a primary means for archaeologists to learn about the lifeways, religious practices, trade, and interaction among Mississippian peoples. The value of this pottery on the illegal antiquities market has led to extensive looting of sites.

Long-nosed god maskette

Long-nosed god maskettes are artifacts made from bone, copper and marine shells associated with the Mississippian culture and found in archaeological sites in the American Midwest and Southeast. They are small shield-shaped faces with squared-off foreheads, circular eyes, and large noses of various lengths. They are often shown on Southeastern Ceremonial Complex representations of falcon impersonators as ear ornaments. Long and short nosed versions of the masks have been found in ten different states, with the majority found at sites in Illinois. Many archaeologists now associate them with the Ho-Chunk (Winnebago) stories of the mythological being Red Horn.

Mill Cove Complex

The Mill Cove Complex is a group of prehistoric archaeological sites located in Duval County, Florida built by people of the St. Johns culture approximately 900 to 1250 CE. The site encompasses 2 sand mounds, Grant Mound (8DU14) and the contemporaneous Shields Mound (8DU12) located 750 metres (0.47 mi) away, and an area in between the two which is full of St. Johns culture midden deposits.

Wulfing cache

The Wulfing cache, or Malden plates, are eight Mississippian copper plates crafted by peoples of the Mississippian culture. They were discovered in Dunklin County, Missouri in 1906 by Ray Grooms, a farmer, while plowing a field south of Malden. The repousséd copper plates were instrumental to archaeologists' developing the concept known as the Southeastern Ceremonial Complex.

Etowah plates collection of Mississippian copper plates discovered at the Etowah Indian Mounds

The Etowah plates, including the Rogan Plates, are a collection of Mississippian copper plates discovered in Mound C at the Etowah Indian Mounds near Cartersville, Georgia. Many of the plates display iconography that archaeologists have classified as part of the Southeastern Ceremonial Complex (S.E.C.C.), specifically "Birdman" imagery associated with warriors and the priestly elite. The plates are a combination of foreign imports and local items manufactured in emulation of the imported style. The designs of the Rogan plates are in the Classic Braden style from the American Bottom area. It is generally thought that some of the plates were manufactured at Cahokia before ending up at sites in the Southeast.

Mississippian copper plates

Mississippian copper plates, or plaques, are plain and repousséd plates of beaten copper crafted by peoples of the various regional expressions of the Mississippian culture between 800 and 1600 CE. They have been found as artifacts in archaeological sites in the American Midwest and Southeast. The plates, found as far afield as Florida, Georgia, Illinois, Mississippi, Oklahoma, Tennessee, and Wisconsin, were instrumental in the development of the archaeological concept known as the Southeastern Ceremonial Complex. Some of the more notable examples are representations of raptorial birds and avian-themed dancing warriors.

Mound 34

Mound 34 is a small platform mound located roughly 400 metres (1,300 ft) to the east of Monks Mound at Cahokia Mounds near Collinsville, Illinois. Excavations near Mound 34 from 2002–2010 revealed the remains of a copper workshop, although the one of a kind discovery had been previously found in the late 1950s by archaeologist Gregory Perino, but lost for 60 years. It is so far the only remains of a copper workshop found at a Mississippian culture archaeological site.

Emmons Cemetery Site

The Emmons Cemetery Site, also known as the Emmons Site, is a Middle Mississippian culture archaeological site located in Kerton Township, Fulton County, Illinois, on the edge of a bluff overlooking the Illinois River to its east. The location was a used as a cemetery and several unique and rare items were found interred with the burials.


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Further reading