Mathematics – Logic
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999msls.work...86t&link_type=abstract
Second Mars Surveyor Landing Site Workshop, p. 86
Mathematics
Logic
Mars Surveyor 2001 Mission, Mars Surface, Landing Sites, Site Selection, Beds (Geology), Planetary Geology, Mars Photographs, High Resolution
Scientific paper
Mangala Valles is an outflow channel system about 850 km long and as much as 300 km wide that cuts the equatorial martian highlands. The channel system originates at one of the northeast-trending Memnonia Fossae graben and ends at the highland-lowland boundary scarp. The debouchment area on Amazonis Planitia extends from lat 4 deg S. to at least lat 2.5 deg N. Mangala Valles channel floor deposits offer grab-bag collection areas as do most of the outflow channels. The channel has ponded areas where floods have accumulated over long periods, similar to Ma'adim Vallis and Gusev crater. The unique and compelling characteristics of Mangala Valles for lander investigations are that it (1) heads at a likely source of thermal water; (2) includes both lava flows and flood deposits; (3) contains areas where water ponded; (4) is mostly covered by high-resolution Viking imagery (<50 m/pixel); and (5) has had detailed 1:500,000-scale geologic maps produced for nearly the entire channel system. Numerous sites of high scientific interest occur along the length of the Mangala Valles channel system. We propose the floor of a 45-km-diameter impact crater breached by a branch of Mangala Valles for the Mars '01 Lander site (centered at lat 6.3 deg S., long 153.2 deg). The crater floor possibly includes material deposited within paleolakes.
Chapman Mary G.
Tanaka Ken L.
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