Date:

Study challenges the narrative of Cahokia’s abandonment

A new study, published in the Sage Journal, casts doubt on the popular theory of why Cahokia was abandoned.

Cahokia was the largest urban settlement of the Mississippian culture, a mound-building pre-Columbian civilisation that emerged in the Midwestern, Eastern, and South-eastern United States.

- Advertisement -

Archaeological evidence suggests that the city was founded around 1050 along the banks of the Mississippi River, located near present-day St. Louis, Missouri.

The city covered an area between six to nine square miles (notably larger than many contemporary European cities such as London), and was home to up to 50,000 inhabitants at its peak.

By around 1400, Cahokia saw a significant population decline, resulting in the settlement’s abandonment. The reasons for this decline are debated among academics, with the prevailing theory suggesting that a prolonged drought led to a large crop failure.

A new study led by Natalie Mueller, an assistant professor of archaeology at Washington University in St. Louis, now challenges this narrative and presents new findings.

- Advertisement -

According to the study authors, all plants use one of two types of carbon for photosynthesis – Carbon 12 and Carbon 13. Plants adapted to dry climates, including prairie grasses and maize, incorporate carbon into their bodies at rates that leave behind a tell-tale signature when the plants die and decay

The plants that the Cahokia people harvested, such as squash, goosefoot, and sumpweed, all have a different signature, one similar to plants from wetlands and native forests.

By collecting soil samples in the strata from the period of abandonment, the researchers analysed the levels of isotopes of carbon left behind. This revealed that the ratios of Carbon 12 and Carbon 13 stayed relatively consistent, contradicting the drought theory.

“We saw no evidence that prairie grasses were taking over, which we would expect in a scenario where widespread crop failure was occurring,” Mueller said.

As to the question on why Cahokia was abandoned, Mueller added: “I don’t envision a scene where thousands of people were suddenly streaming out of town. People probably just spread out to be near kin or to find different opportunities.”

Header Image Credit : Shutterstock

Sources : Rankin, C. G., & Mueller, N. G. (2024). Correlating Late-Holocene climate change and population dynamics at Cahokia Mounds (American Bottom, USA). The Holocene, 0(0). https://doi.org/10.1177/09596836241254488

- Advertisement -
spot_img
Mark Milligan
Mark Milligan
Mark Milligan is multi-award-winning journalist and the Managing Editor at HeritageDaily. His background is in archaeology and computer science, having written over 8,000 articles across several online publications. Mark is a member of the Association of British Science Writers (ABSW), the World Federation of Science Journalists, and in 2023 was the recipient of the British Citizen Award for Education, the BCA Medal of Honour, and the UK Prime Minister's Points of Light Award.
spot_img

Mobile Application

spot_img

Related Articles

Lost crusader altar discovered in holiest site of Christendom

Archaeologists from the Austrian Academy of Sciences (ÖAW), working in collaboration with the Israel Antiquities Authority (IAA), have discovered a lost crusader altar in the Church of the Holy Sepulchre.

Viking arrowhead found frozen in ice

Archaeologists from the “Secrets of the Ice” project have discovered a Viking Era arrowhead during a survey of an ice site in the Jotunheimen Mountains.

Underwater archaeologists find 112 glassware objects off Bulgaria’s coast

A team of underwater archaeologists from the Regional Historical Museum Burgas have recovered 112 glass objects from Chengene Skele Bay, near Burgas, Bulgaria.

Bronze Age axe found off Norway’s east coast

Archaeologists from the Norwegian Maritime Museum have discovered a Bronze Age axe off the coast of Arendal in the Skagerrak strait.

Traces of Bahrain’s lost Christian community found in Samahij

Archaeologists from the University of Exeter, in collaboration with the Bahrain Authority for Culture and Antiquities, have discovered the first physical evidence of a long-lost Christian community in Samahij, Bahrain.

Archaeologists uncover preserved wooden elements from Neolithic settlement

Archaeologists have discovered wooden architectural elements at the La Draga Neolithic settlement.

Pyramid of the Moon marked astronomical orientation axis of Teōtīhuacān

Teōtīhuacān, loosely translated as "birthplace of the gods," is an ancient Mesoamerican city situated in the Teotihuacan Valley, Mexico.

Anglo-Saxon cemetery discovered in Malmesbury

Archaeologists have discovered an Anglo-Saxon cemetery in the grounds of the Old Bell Hotel in Malmesbury, England.