440 Ma ice stream in North Africa

Moreau, J. and Ghienne, J. F. and Le Heron, D. P. and Rubino, J. L. and Deynoux, M. (2005) 440 Ma ice stream in North Africa. Geology, 33 (9). pp. 753-756. DOI 10.1130/G21782.1

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Abstract

Landsat images, ASTER digital elevation models, aerial photographs, and field investigations in the western Murzuq Basin (Libya) and the adjacent Tassili N'Ajjers (Algeria) provide paleogeomorphological evidence for the existence of a Late Ordovician ice stream at least 200 km long and 80 km wide. This includes mega-scale glacial lineations, an associated subglacial meltwater drainage system, and ice-front features. This first comprehensive description of a pre-Cenozoic ice stream may help to identify other examples in the Proterozoic to Paleozoic glacial record. Reconstruction of the extent and behavior of former ice sheets, and reservoir prospect analysis in glacially related successions, have to take into account the potential occurrence of ice streams.

Item Type: Article
Uncontrolled Keywords: 2005 AREP 2005 P IA49 CASP
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Geology
Volume: 33
Page Range: pp. 753-756
Identification Number: 10.1130/G21782.1
Depositing User: Sarah Humbert
Date Deposited: 31 Jan 2011 17:30
Last Modified: 23 Jul 2013 09:59
URI: http://eprints.esc.cam.ac.uk/id/eprint/1756

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