Geyh, Mebus A. and Heine, Klaus (2014) Several distinct wet periods since 420 ka in the Namib Desert inferred from U-series dates of speleothems. QUATERNARY RESEARCH, 81 (2). pp. 381-391. ISSN 0033-5894, 1096-0287
Full text not available from this repository. (Request a copy)Abstract
The scarcity of numerical dates of the arid areas in southern Africa is a challenge for reconstructing paleoclimate. This paper presents a chronological reconstruction in the central part of the Namib Desert, Namibia, for the last 420,000 yr. It is based on Th-230/U dates (TIMS) from a large stalagmite and a thick flowstone layer in a small cave located in the hyper-arid central Namib Desert. The results provide for the first time evidence of three or possibly four succeeding wet periods of decreasing intensity since 420 ka through which speleothem deposited at approximately 420-385 ka, 230-207 ka and 120-117 ka following the 100-ka Milankovitch cycle. Speleothem growth was not recorded for the Holocene. These wet periods interrupted the predominantly dry climate of the Namib Desert and coincided with wet phases in deserts of the northern hemisphere in the Murzuq Basin, Sahara, the Negev, Israel, the Nafud Desert, Saudi Arabia, and the arid northern Oman, Arabian Peninsula. (c) 2013 University of Washington. Published by Elsevier Inc. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SOUTHWESTERN AFRICA; IMPURE CARBONATES; SOUTHERN-AFRICA; WIND-STRENGTH; GRAIN-SIZE; RECORD; AGES; SEA; DEPOSITS; EPISODES; Namib Desert; Speleothems; Th-230/U dating; Middle/Late Pleistocene; Paleoclimate; Paleoprecipitation; Milankovitch forcing |
| Subjects: | 900 History & geography > 900 Geography & history |
| Divisions: | Philosophy, Art History, History, and Humanities > Institut für Geographie Philosophy, Art History, History, and Humanities > Institut für Geographie > Lehrstuhl für physische Geographie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 18 Nov 2019 09:50 |
| Last Modified: | 18 Nov 2019 09:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10525 |
Actions (login required)
 |
View Item |
