In:
Bulletin de l’Institut français d’études andines, PERSEE Program, Vol. 24, No. 3 ( 1995), p. 551-562
Abstract:
25,000 yr BP paleohydrology of the bolivian Andes 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 semi-quantitative changes in temperature and 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, temparatures 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.
Type of Medium:
Online Resource
ISSN:
0303-7495
DOI:
10.3406/bifea.1995.1205
Language:
French
Publisher:
PERSEE Program
Publication Date:
1995
detail.hit.zdb_id:
2106197-X
