Rezente Abtragung und geomorphologische Bedingungen im Becken von Quarzazate (Süd-Marokko) ; Arbeit im Forschungsprojekt Mobilität aktiver Kontinentalränder ; Current ersosional processes and their geomorphological boundary factors in the Ouarzazate basin
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Media type:
E-Book
Title:
Rezente Abtragung und geomorphologische Bedingungen im Becken von Quarzazate (Süd-Marokko) ; Arbeit im Forschungsprojekt Mobilität aktiver Kontinentalränder ; Current ersosional processes and their geomorphological boundary factors in the Ouarzazate basin
Contributor:
Wagner, Peter
[Author]
imprint:
Inst. für Physische Geographie, FU, Berlin, 1984
Published in:Herausgeberexemplar (FU Berlin) ; ZB 20559:38
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
[contains map: Ouarzazate – Hydrographie und Stufen] ; [contains map: Ouarzazate - Oberflächenerodierbarkeit] [contains geomorphological maps] ; Summary: Investigations into current erosional processes and their geomorphological boundary factors in the Ouarzazate basin show the significant influence here of local relief on the course and intensity of relief-modifying processes. The bedrock’s resistance to weathering and erosion is also important. A limiting factor is the scarcity of water due to the rare (geomorphodynamically effective) heavy rainstorms. The influence of the extremely sparse vegetation as a controlling factor in the erosional process is negligible. There is relatively little erosional activity on the gently inclined plains. The existing rills and rill wash do not destroy the plains. On the basis of simulation runs the surfaces of the individual geological units were classified in the order given below (starting with the surface most prone to erosion): (10) loamy bottom lower terrace (Early Holocene) ; (9) lowest glacis level q1 (Late Pleistocene) ; (8) Mio-Pliocene marl surfaces and top glacis levels q6 (Oldest Pleistocene) ; (7) youngest terrace sediments (Late Holocene) ; (6) areas of Mio-Pliocene sandstones ; (5) Weathering surfaces on Pre-Cambrian Anti-Atlas-Rocks ; (4) middle glacis level q2 (Mid-Pleistocene) ; (3) middle glacis level q3 (Mid-Pleistocene) ; (2) upper (Oldest-Pleistocene) glacis level q5; structural and erosion surfaces in Mio-Pliocene conglomerates ; (1) higher glacis levels q4 (Early Pleistocene) ; Aeolian processes on the plains are prevented by the presence of boulder pavements and the effect of the surface crust. The cuestas in the Ouarzazate basin consist of a caprock of Mio—Pliocene conglomerates (mpc) overlying a basement of Tertiary sandstone and marl and are presently subject to increased geodynamic activity. Even under prevailing arid conditions weathering and transportation of the conglomerate’s debris down the steep slopes may result in undercutting of the ...