Paleohidrologia de los ultimos 25 000 anos en los Andes bolivianos

Translated title of the contribution: 25 000 yr BP paleohydrology of the Bolivian Andes

Jaime Argollo Bautista, P. Mourguiart

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We report a high-resolution climate reconstruction for the Bolivian Altiplano (Central Andes) based on geomorphological, sedimentological, palynological, and analysis of lacustrine ostracod shells. We determine (1) semi-quantitative changes in temperature and (2) quantitative changes in lake-levels from the late Pleistocene (25 000 yr BP) to the present. The principal results are the following ones: from 25 000 to 18 000 yr BP, temperatures decreased as lake-levels lowered; between 18 000 and 15 000/14 000 yr BP, a sedimentary hiatus indicates very low Lake Titicaca levels; during the last deglaciation (15 000/14 000, 10 500 yr BP), lake levels (Tauca phase) and glaciers were consistently wide in the Altiplano and cordilleras; from 10 500 to 8000 yr BP, lake levels declined and glaciers receded as global temperature increased; during the mid-Holocene (8000-3900 yr BP) a dry climate generally prevailed; by 3900 yr BP, the lake level rose markedly and relatively moist conditions were established and persisted after; during the Little Ice Age (16th-19th centuries), moist and cold conditions prevailed.

Translated title of the contribution25 000 yr BP paleohydrology of the Bolivian Andes
Original languageSpanish
Pages (from-to)551-562
Number of pages12
JournalBulletin - Institut Francais d'Etudes Andines
Volume24
Issue number3
StatePublished - 1995

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