Other
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..383f&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 383.
Other
1
Mars Craters, Planetary Evolution, Terrain Analysis, Structural Basins, Hypervelocity Impact, Planetary Crusts, Mars Surface, Highlands, Plains, Astronomical Models
Scientific paper
The WAS region is the largest of several on Mars that depart from the normal paradigm of 'cratered highlands'. Although heavily cratered, the region lies 1-2 km below the average elevation, and therefore significantly lower than most of the cratered terrain on Mars. The downhill slope toward the Chryse impact basin has the character of a broad shelf, portions of which are covered by isolated outcrops of Hesperian ridged plains. The westernmost section is noticeably depleted in large craters and small basins. Crustal thickness models suggest this area is also much thinner than other cratered terrain, but still thicker than than the younger northern lowlands. We explore several possible reasons for this large area of lowlying ancient terrain. WAS may be a good analog of the terrain which underlies the northern lowland plains.
Frey Herbert V.
Roark James H.
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