Mathematics – Logic
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept...73d&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 73-74 (SEE N92-10728 01-91)
Mathematics
Logic
Geochronology, Geological Faults, Mars Surface, Mars Volcanoes, Planetary Geology, Tectonics, Troughs, Cementation, Ice, Paleontology, Photogeology, Planetary Crusts, Stratigraphy, Surface Water, Volcanology, Water
Scientific paper
Recent work on the north Tharsis of Mars has revealed a complex geologic history involving volcanism, tectonism, flooding, and mass wasting. Our detailed photogeologic analysis of this region found many previously unreported volcanic vents, volcaniclastic flows, irregular cracks, and minor pit chains; additional evidence that volcanic tectonic processes dominated this region throughout Martian geologic time; and the local involvement of these processes with surface and near surface water. Also, photoclinometric profiles were obtained within the region of troughs, simple grabens, and pit chains, as well as average spacings of pits along pit chains. These data were used together with techniques to estimate depths of crustal mechanical discontinuities that may have controlled the development of these features. In turn, such discontinuities may be controlled by stratigraphy, presence of water or ice, or chemical cementation.
Davis Paul A.
Golombek Matthew P.
Plescia Jeffrey B.
Tanaka Kenneth L.
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