| Autor: |
Guédron, Stéphane, Delaere, Christophe, Fritz, Sherilyn. C., Tolu, Julie, Sabatier, Pierre, Devel, Anne-Lise, Heredia, Carlos, Vérin, Claire, Alves, Eduardo Q., Baker, Paul A. |
| Předmět: |
|
| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 1/10/2023, Vol. 120 Issue 2, p1-9, 31p |
| Abstrakt: |
Holocene climate in the high tropical Andes was characterized by both gradual and abrupt changes, which disrupted the hydrological cycle and impacted landscapes and societies. High-resolution paleoenvironmental records are essential to contextualize archaeological data and to evaluate the sociopolitical response of ancient societies to environmental variability. Middle-to-Late Holocene water levels in Lake Titicaca were reevaluated through a transfer function model based on measurements of organic carbon stable isotopes, combined with high-resolution profiles of other geochemical variables and paleoshoreline indicators. Our reconstruction indicates that following a prolonged low stand during the Middle Holocene (4000 to 2400 BCE), lake level rose rapidly ~15 m by 1800 BCE, and then increased another 3 to 6 m in a series of steps, attaining the highest values after ~1600 CE. The largest lake-level increases coincided with major sociopolitical changes reported by archaeologists. In particular, at the end of the Formative Period (500 CE), a major lake-level rise inundated large shoreline areas and forced populations to migrate to higher elevation, likely contributing to the emergence of the Tiwanaku culture. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
