Inca Huasi (ancient lake)

Inca Huasi was a paleolake in the Andes. It was named by a research team in 2006.{{sfn|Placzek|Quade|Patchett|2006|p=524}}

It existed about 46,000 years ago in the Salar de Uyuni basin.{{sfn|Placzek|Quade|Patchett|2006|p=520}} Water levels during this episode rose by about {{convert|10|m}}. Overall, this lake cycle was short and not deep,{{sfn|Placzek|Quade|Patchett|2006|p=524}} with water levels reaching a height of {{convert|3670|m}}. The lake would have had a surface of {{convert|21000|km2}}.{{sfn|Placzek|Quade|Patchett|2013|p=103}} Most water was contributed to it by the Uyuni-Coipasa drainage basin, with only minimal contributions from Lake Titicaca. Changes in the South American monsoon may have triggered its formation.{{sfn|Zech|Zech|Morrás|Moretti|2009|p=131}}

Radiocarbon dates on tufa which formed in Lake Inca Huasi were dated at 45,760 ± 440 years ago.{{sfn|Placzek|Quade|Patchett|2006|p=520}} Uranium-thorium dating has yielded ages between 45,760 and 47,160 years.{{sfn|Placzek|Quade|Patchett|2006|p=521}} Overall the lake existed between 46,000 and 47,000 years ago.{{sfn|Placzek|Quade|Patchett|2013|p=104}} The Inca Huasi cycle coincides with the marine isotope stage 3, the formation of a deep lake in the Laguna Pozuelos basin and the expansion of glaciers in several parts of South America including the Puna.

This lake cycle took part during a glacial epoch, along with the Sajsi lake cycles.{{sfn|Placzek|Quade|Patchett|2006|p=531}} A more humid climate in northeastern Argentina and elsewhere in subtropical South America has been linked to the Inca Huasi phase.{{sfn|Zech|Zech|Morrás|Moretti|2009|p=131}} However, rainfall might not have increased by much in the Altiplano during the Inca Huasi cycle.{{sfn|Placzek|Quade|Patchett|2013|p=104}}

Other paleolakes are Coipasa, Ouki, Minchin, Sajsi, Salinas and Tauca.{{sfn|Placzek|Quade|Patchett|2006|p=520}} Research made in 2006 attributed the "Lake Minchin" to this lake phase.{{sfn|Zech|Zech|Morrás|Moretti|2009|p=131}}

References

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{{cite journal |last1=Guerra |first1=Lucía |last2=Martini |first2=Mateo A. |last3=Vogel |first3=Hendrik |last4=Piovano |first4=Eduardo L. |last5=Hajdas |first5=Irka |last6=Astini |first6=Ricardo |last7=De Haller |first7=Antoine |last8=Moscariello |first8=Andrea |last9=Loizeau |first9=Jean‐Luc |last10=Ariztegui |first10=Daniel |title=Microstratigraphy and palaeoenvironmental implications of a Late Quaternary high‐altitude lacustrine record in the subtropical Andes |journal=Sedimentology |date=October 2022 |volume=69 |issue=6 |pages=2585–2614 |doi=10.1111/sed.13004|hdl=20.500.11850/572803 |hdl-access=free }}

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{{cite journal |last1=Ward |first1=D. |last2=Thornton |first2=R. |last3=Cesta |first3=J. |title=Across the Arid Diagonal: deglaciation of the western Andean Cordillera in southwest Bolivia and northern Chile |journal=Cuadernos de Investigación Geográfica |date=15 September 2017 |volume=43 |issue=2 |page=689 |doi=10.18172/cig.3209 |language=es |issn=1697-9540|doi-access=free}}

{{cite journal|last1=Zech|first1=Michael|last2=Glaser|first2=Bruno|title=Improved compound-specificδ13C analysis of n-alkanes for application in palaeoenvironmental studies|journal=Rapid Communications in Mass Spectrometry|date=30 January 2008|volume=22|issue=2|pages=135–42|doi=10.1002/rcm.3342|pmid=18059042}}

{{cite journal|last1=Placzek|first1=Christa J.|last2=Quade|first2=Jay|last3=Patchett|first3=P. Jonathan|title=Isotopic tracers of paleohydrologic change in large lakes of the Bolivian Altiplano|journal=Quaternary Research|date=January 2011|volume=75|issue=1|page=239|doi=10.1016/j.yqres.2010.08.004|s2cid=54069269 |url=https://researchonline.jcu.edu.au/20610/1/QuaternaryResearch2011.pdf}}

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= Sources =

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Category:Former lakes of South America

Category:Geology of Bolivia

Category:Pleistocene

Category:Lakes of Bolivia