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Study challenges the narrative of Cahokia’s abandonment

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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.

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.

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

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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Archaeology

Archaeologists study submerged Nabataean temple

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In 2023, archaeologists discovered the submerged remains of a Nabataean temple during an underwater survey of the ancient port of Puteoli, located in modern-day Pozzuoli, Italy.

Puteoli was established in the mid-6th century BC as a Greek colony called Dicaearchia. After the Roman conquest of Campania following the First Samnite War, Dicaearchia was annexed into the Roman Republic, which later founded the colony of Puteoli.

Puteoli served as one of the primary trading hubs for Rome, emerging as the great emporium of foreign trade for the Alexandrian grain ships and goods from across the Roman world.

Due to the position of Puteoli in the Phlegraean Fields, an active volcanic region, volcanic bradyseismic activity has raised and lowered the geology on the peninsula, resulting in parts of Puteoli being submerged.

The results of a year-long study, published in the journal Antiquity, has mapped and reconstructed parts of the submerged temple, the only known temple located outside of Nabataea – an allied kingdom of Rome that controlled territory from the Euphrates to the Red Sea.

The Nabataean temple and the internal routes of the vicus Lartidianus (dotted lines) at the current stage of research – Image Credit : M. Silani

Using a photogrammetric survey, the researchers have identified that the temple had a rectangular plan and two rooms with access facing north, linked to the internal routes of the vicus Lartidianus (an area designated for foreign people engaged in trade).

Within one of the rooms (designated Room A) are two altars made of white Luni marble, and a mensa with eight rectangular recesses for housing aniconic betils. In the second room (designated Room B), the southern perimeter wall has a white marble slab covering, one of which shows the inscription Dusari sacrum, meaning “consecrated to Dushara”, the chief deity of the Nabataean pantheon.

According to the study authors: “The existence of a Nabataean sanctuary within the port area confirms that there was a community from that region participating in the commercial activities of Puteoli.”

“The integration of these individuals within the local community is evident in the building techniques and materials used in the construction of the temple, and for the choice of Latin for the inscriptions to their supreme god, the lord of the mountains and the germinating force of nature, Dushara.”

Header Image Credit : M.Steanile

Sources : Antiquity | https://doi.org/10.15184/aqy.2024.107

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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Archaeology

Treasure hoard discovered in Viking farmstead

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Archaeologists from the Archaeological Museum at the University of Stavanger have discovered a Viking treasure hoard in the Hjelmeland municipality, Norway.

Excavations were in preparation for the construction of a new farm track to identify any archaeological remains in situ. The researchers discovered traces of a Viking farmstead, consisting of several structures for both the inhabitants and their animals.

Numerous domestic and agricultural objects have been unearthed, including soapstone pots, knife blades, rivets, and whetstones used for sharpening tools.

Mari Krogstad Samuelsen and Ola Tengesdal Lygre were excavating a dwelling used for housing slaves, when they identified what appeared to be twisted hedging wire at a depth of 20 centimetres.

Upon further inspection, the objects were revealed to be four heavy silver bracelets, each adorned with distinct decorative elements.

“This is definitely the biggest thing I have experienced in my career”, says archaeologist and project manager Volker Demuth from the Archaeological Museum at the University of Stavanger.

“This is a unique find, because we very rarely find such objects exactly where they were placed. As a rule, such valuable objects are discovered on fields that have been ploughed, where an object has been completely removed from its original context,” added Demuth.

According to the archaeologists, the hoard dates from around the 9th century AD and shares similarities to silver necklaces found in Hjelmeland in 1769. At that time, there were no silver mines operating in Norway, so all the silver used by the Vikings was sourced from abroad, obtained through trade, received as gifts, or taken as loot during their raiding expeditions.

Evidence of burning also indicates that the farmstead was destroyed by fire, likely during a time of conflict that required the necessity for the inhabitant’s valuables to be deposited in the ground for security.

Header Image Credit : Archaeological Museum at the University of Stavanger

Sources : Archaeological Museum at the University of Stavanger

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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