440 Ma ice stream in North Africa

Julien Moreau; Jean François Ghienne; Daniel Paul Le Heron; Jean Loup Rubino; Max Deynoux

doi:10.1130/G21782.1

440 Ma ice stream in North Africa

Julien Moreau, Jean François Ghienne, Daniel Paul Le Heron, Jean Loup Rubino, Max Deynoux

Publications: Contribution to journal › Article › Peer Reviewed

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.

Original language	English
Pages (from-to)	753-756
Number of pages	4
Journal	Geology
Volume	33
Issue number	9
DOIs	https://doi.org/10.1130/G21782.1
Publication status	Published - 1 Sept 2005
Externally published	Yes

Austrian Fields of Science 2012

105121 Sedimentology

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10.1130/G21782.1

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AU - Moreau, Julien

AU - Ghienne, Jean François

AU - Le Heron, Daniel Paul

AU - Rubino, Jean Loup

AU - Deynoux, Max

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Y1 - 2005/9/1

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AB - 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.

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440 Ma ice stream in North Africa

Abstract

Austrian Fields of Science 2012

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