Groundwater-mediated response to Holocene climatic change recorded by the diatom stratigraphy of an Ethiopian crater lake
The diatom stratigraphy of a 23-m sediment core from Lake Tilo, a maar lake in the Ethiopan Rift Valley, provides a 10,000-yr record of lake salinity and trophic status. The results show that the lake remained relatively fresh throughout the early Holocene arid intervals, due to high rates of geothermal groundwater discharge. Palaeoclimatic interpretation of palaeosalinity proxies from the sediments of volcanic crater lakes should be approached with caution
Quaternaire ; Paléo-environnement ; Holocène ; Paléolimnologie ; Eau souterraine ; Variation climatique ; Sédiment lacustre ; Salinité ; Volcanisme ; Lac de cratère ; Ethiopie
Quaternary ; Palaeo-environment ; Holocene ; Palaeolimnology ; Groundwater ; Climatic variation ; Lacustrine sediment ; Salinity ; Volcanism ; Ethiopia
Article of periodic
published at : Quaternary research / ISSN 0033-5894 / CODEN QRESAV
Editor : Elsevier, San Diego, CA - ETATS-UNIS (1970)
Millesime : 1999, vol. 52, no1 [pp. 63-75]
Bibliographic references : 37 ref.
Collation : Illustration ;
Anglais
INIST-CNRS, Cote INIST : 15739