From Megachad to Microchad - environmental changes during the Holocene

The investigations carried out within the project in NE-Nigeria since 1989 have been focussing on the late Pleistocene and Holocene landscape development of the south eastern Chad basin. Areas of interest include palaeod
The investigations carried out within the project in NE-Nigeria since 1989 have been focussing on the late Pleistocene and Holocene landscape development of the south eastern Chad basin. Areas of interest include palaeodune fields, clay plains and former beach ridge systems of Lake Chad. Transgressions and regressions of Lake Chad played an important role in the younger landscape history of NE-Nigeria and have also caused great environmental changes. The term „Megachad“ is well known and describes an enormous lake with an extension comparable with the Caspian Sea of today. The term „Microchad“ stands for the other recent extreme in terms of the lake dimensions varying during the times. Environmental changes in the surroundings of Lake Chad are closely connected with transgressions and regressions of the lake. These lake level changes can be climatically induced as well as non-climatically, due to human impact. Nearly all land units have more or less been influenced by the lake, spatially as well as temporally. It is important, though, to notice the scales of the changes. Some changes took place in a millennial scale, some in the scales of centuries or decades, and at least – as can be observed every year – in a seasonal scale.
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Metadaten
Author:Heinrich Thiemeyer
URN:urn:nbn:de:hebis:30-36271
Parent Title (German):Sonderforschungsbereich Kulturentwicklung und Sprachgeschichte im Naturraum Westafrikanische Savanne <Frankfurt, Main>: Vorträge, internationales Symposium
Series (Serial Number):Berichte des Sonderforschungsbereichs 268 (14, 011)
Publisher:SFB 268
Place of publication:Frankfurt, M.
Document Type:Part of a Book
Language:English
Date of Publication (online):2006/12/20
Year of first Publication:2000
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2006/12/20
Pagenumber:8
First Page:11
Last Page:18
HeBIS PPN:290542731
Institutes:SFB 268
Dewey Decimal Classification:570 Biowissenschaften; Biologie
Sammlungen:Universitätspublikationen
Sondersammelgebiets-Volltexte
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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