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Seismic Examples of Tunnel Valleys from the LAte Ordovician Glaciation in North Africa
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 71st EAGE Conference and Exhibition - Workshops and Fieldtrips, Jun 2009, cp-129-00108
- ISBN: 978-94-6282-103-3
Abstract
During the Lower Palaeozoic, the Saharan craton was part of the North-Western passive margin of Gondwana and was located close to the South Pole during the Cambrian and Ordovician (Stamplfi & Borel, 2002). A short-lived glaciation event occurred in the Latest Ordovician. The ice sheet covered a large part of North Africa and resulted in a major phase of glacial erosion. This glacial erosion formed the tunnel valleys that we see in the outcrops of the Tassili N’Ajjers today.