Implications of Viking color data for evolution of the Amenthes Region, Mars

Details Implications of Viking color data for evolution of the Amenthes Region, Mars Implications of Viking color data for evolution of the Amenthes Region, Mars

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..472m&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 472-473 (SEE N87-23341 16-91)

Mathematics

Logic

Crustal Fractures, Dichotomies, Geological Faults, Mars Surface, Planetary Evolution, Craters, Lava, Volcanoes

Scientific paper

In the Eastern Hemisphere of Mars, where the hemispheric dichotomy is not overlain by relatively recent flows from the Tharsis volcanoes, the Mars cratered terrain boundary (CTB) now exists as highly fractured terrain juxtaposed with the smooth plains of the Northern Hemisphere. Based on Mariner 9 photography, the southern cratered terrain in the Amenthes region (0 to 30 deg N, 225 to 270 deg W) is approximately 3 to 4 km above the northern plains, and the transition zone is marked by both broad plateaus and knobby terrain. In the Amenthes Southest quadrangle, in particular, the continuum between large detached plateaus, smaller smooth topped plateaus and knobby hills can be seen. To define the previous position and evolution of the boundary, the distribution of cratered terrain, characteristic landforms (knobby terrain and detached plateaus) have been mapped, as well as structural features across the boundary. Structural mapping indicates that geological formations parallel the boundary in the Eastern Hemisphere with the conclusion that CTB evolution involved normal faulting through extension perpendicular to the boundary.

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