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Late Pleistocene and Holocene palaeohydrology of Lake Rukwa, Tanzania, inferred from diatom analysis

Barker, P. and Telford, R. and Gasse, Françoise and Thevenon, Florian (2002) Late Pleistocene and Holocene palaeohydrology of Lake Rukwa, Tanzania, inferred from diatom analysis. Palaeogeography, Palaeoclimatology, Palaeoecology, 187 (3-4). pp. 295-305. ISSN 0031-0182

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Abstract

Diatom analysis has been used to provide information on the lake-level fluctuations of Lake Rukwa during the last 21.7 ka. Diatom-inferred chemical variables (conductivity, pH, anion and cation ratios) indicate that at the LGM lake level was low, probably driven by a low P:E ratio, but with sufficient water to avoid desiccation. Following the LGM, deep water conditions were obtained through a series of steps until maximum water depth was reached by at least 13.5 ka. The high lake-level phase lasted through the Early Holocene until after 6.7 ka. A shallow saline lake has occupied the basin from ca. 5.5 ka until the present day. The pattern of reconstructed lake-level fluctuation in Lake Rukwa is similar to that from Lake Tanganyika and other lakes from the equatorial and northern tropical zone. We can confirm that the N-tropical mode of millennial scale lake-level change since the LGM extended to at least 8°S.

Item Type: Article
Journal or Publication Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Additional Information: Nov 15 Late Pleistocene and Holocene palaeohydrology of Lake Rukwa, Tanzania, inferred from diatom analysis Times Cited: 27 2nd International Congress of Limnogeology (ILIC 2) MAY 25-28, 1999 UNIV WESTERN BRETAGNE, INST UNIV EUROPEAN MER, PLOUZANE, FRANCE
Uncontrolled Keywords: diatoms ; transfer functions ; lake levels ; tropical palaeoclimate ; Late Quaternary
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 53050
Deposited By: ep_importer_pure
Deposited On: 19 Mar 2012 09:34
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:13
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/53050

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