IGB

Document title

Groundwater-mediated response to Holocene climatic change recorded by the diatom stratigraphy of an Ethiopian crater lake

Authors(s) and Affiliation(s)

TELFORD R.J. ; LAMB H.F. ;

Abstract

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

Keyword(s)

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

Classification code(s)

531-53 : Quaternaire.

531-III : GEOGRAPHIE PHYSIQUE.

531 : BGI / PRODIG.

Source

Article of periodic

published at : Quaternary research / ISSN 0033-5894 / CODEN QRESAV

Editor : Elsevier, San Diego, CA - ETATS-UNIS (1970)

Millesime : 1999, vol. 52, n^o1 [pp. 63-75]

Bibliographic references : 37 ref.

Collation : Illustration ;

Language

Anglais

INIST-CNRS, Cote INIST : 15739