Holocene lake-level fluctuations of Lake Aricota, southern Peru

Auteurs :
PLACZEK, C.
QUADE, J.
BETANCOURT, J.L.

Description :
Lacustrine deposits exposed around Lake Aricota, a lake dammed by debris flows, provide a middle to late Holocene record of lake-level fluctuations. Chronological context for shoreline deposits was obtained from radiocarbon dating of vascular plant remains and other datable material with minimal C 14 reservoir effects (<350 yr). Diatomites associated with highstands several meters above the modern lake level indicate wet episodes. The highstand at Lake Aricota during the middle Holocene is coeval with a major lowstand at Lake Titicaca. Comparisons with other marine and terrestrial records highlight emerging contradictions over the nature of mid-Holocene climate in the central Andes.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 2001, vol. 56, n°. 2, p. 181-190, nombre de pages : 10, Collation : Illustration, Références bibliographiques : 34 ref.

Date :
2001

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier