Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..133k&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 133-134 (SEE N92-10728 01-91)
Physics
Geophysics
Mars Surface, Mars Volcanoes, Planetary Geology, Stratigraphy, Tectonics, Terrain, Canyons, Deposition, Erosion, Lunar Topography, Paleontology, Planetary Evolution, Structural Properties (Geology)
Scientific paper
The layered terrain in Valles Marineris provides information about its origin and the geologic history of this canyon system. Whether the terrain is sedimentary material deposited in a dry or lacustrine environment, or volcanic material related to the tectonics of the canyon is still controversial. However, recent studies of Gangis Layered Terrain suggests a cyclic sequence of deposition and erosion under episodic lacustrine conditions. The stratigraphic studies are extended to four other occurrences of layered terrains in Valles Marineris in an attempt to correlate and distinguish between depositional environments. The Juvantae Chasma, Hebes Chasma, Ophir and Candor Chasmata, Melas Chasma, and Gangis Layered Terrain were examined. Although there are broad similarities among the layered terrains, no two deposits are exactly alike. This suggests that there was no synchronized regional depositional processes to form all the layered deposits. However, the similar erosional style of the lower massive weakly bedded unit in Hebes, Gangis, and Ophir-Candor suggests it may have been deposited under similar circumstances.
Komatsu Goro
Strom Roger G.
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