Publication Date:
1991-09-01
Description:
Field research in the eastern Sahara (Northwest Sudan) revealed extensive early- to mid-Holocene lake marl deposits bearing gyrogonites of Charophytes (green algae, stoneworts) along the lower course of the Wadi Howar, an extinct tributary to the Nile. The Charophyte flora of a paleolake southwest of Jebel Rahib (17°31′N/26°52′E) dated prior to 4720 ± 110 yr B.P. is mainly composed of the ecologically sensitive species Nitellopsis obtusa which indicates permanent, relatively deep (4–12 m) and cool oligotrophic freshwater. The study of Nitellopsis sites provides a new and promising approach to the reconstruction of Quaternary paleoenvironments of deserts.
Print ISSN:
0033-5894
Electronic ISSN:
1096-0287
Topics:
Geography
,
Geosciences
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