The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes

The Holocene
By: , and 

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Abstract

We report a tephra deposit in the southern Lake Titicaca Basin, Bolivia, which was deposited by a major, previously unrecognized eruption sometime between AD 400 and 720. Archaeological data suggest these centuries were characterized by a substantial community migration to Tiwanaku, where social interaction networks gave birth to one of the Andes’ first large complex societies. Here we provide an initial characterization of this tephra, based on samples from the archaeological site Khonkho Wankane. The same tephra is present at two other archaeological sites in the region. Given the great distance to the nearest active volcano, this tephra layer likely derives from a large-magnitude, Late-Holocene explosive eruption of a Central Andean volcano. We suggest that this major event be included in the human history of the region, given its inferred magnitude and wide dispersal area. Future research could confirm the Khonkho tephra at other sites, identify the source volcano, estimate its volume, and more precisely date the eruption.

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Publication type Article
Publication Subtype Journal Article
Title The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes
Series title The Holocene
DOI 10.1177/09596836241275000
Volume 34
Issue 12
Year Published 2024
Language English
Publisher Sage Journals
Contributing office(s) Volcano Science Center
Description 10 p.
First page 1865
Last page 1874
Country Bolivia, Peru
Other Geospatial southern Lake Titicaca Basin
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