Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusm.p42a..03f&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #P42A-03
Other
5416 Glaciation, 5462 Polar Regions, 6225 Mars, 1827 Glaciology (1863)
Scientific paper
There is much evidence, in the form of glacial retreat features and the partially retreated Olympia Lobe, that the martian north polar cap has undergone at least one episode of retreat. Formation of some of these features may be linked to a dark, sandy basal layer beneath the layered deposits (as described by S. Byrne and B. Murray, JGR, in press, 2002). This layer may be porous enough to have held a significant amount of water which was released by heating to form Chasma Boreale and other smaller reentrants. Spiraling troughs dominate the surface of the polar cap, exposing the layered deposits and, in some places, the dark, basal layer. These troughs appear to be younger than Chasma Boreale and than the Olympia Lobe retreat. We examine the relationships between melting events and polar cap retreat, the role of the dark basal layer, and the stratigraphic relationships revealed by the polar troughs.
Fishbaugh Kathryn E.
Head James W.
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