Physics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gsamb..94.1035b&link_type=abstract
Geological Society of America, Bulletin (ISSN 0016-7606), vol. 94, Sept. 1983, p. 1035-1054. NASA-supported research.
Physics
6
Mars, Surface, Features, Terrain, Topography, Channels, Comparisons, Classification, Photographs, Valleys, Morphology, Ravi Vallis, Maps, Parana Vallis, Ares Vallis, Geomorphology, Chryse Planitia, Craters, Maja Vallis, Kasei Vallis, Nirgal Vallis, Patterns, Diagrams, Genesis, Distribution, Ages, Data, Eolian Effects, Flows, Physics, Dunes, Mangala Vallis, Debris, Ice, Glaciers, Bibliography
Scientific paper
Tentative conclusions about the origins of channels and valleys on Mars based on the consensus of investigators who have studied the problem are presented. The morphology of outflow channels is described in detail, and the morphology, distribution, and genesis of Martian valleys are addressed. Secondary modification of channels and valleys by mass-wasting phenomena, eolian processes, cratering, and mantling by lava flows is discussed. The physics of the flows needed to account for the immense volumes of Martian outflow channels is considered in detail, including the possible influence of debris flows and mudflows, glaciers, and ice sheets. It is concluded that Mars once probably possessed an atmosphere with higher temperatures and pressures than at present which played an essential role in an active hydrological cycle.
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