Mathematics – Logic
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.297..546m&link_type=abstract
Nature, vol. 297, June 17, 1982, p. 546-550.
Mathematics
Logic
17
Flow Measurement, Lava, Mars Volcanoes, Planetary Evolution, Radar Measurement, Tectonics, Topography, Flow Distribution, Mars Surface, Volcanology, Mars, Tharsis Region, Features, Lavas, Flows, Topography, Comparisons, Radar Observations, Tectonism, Deformation, Maps, Photography, Data, Volcanism, Olympus Mons, Ascraeus Mons, Lithosphere, Thickness, Slope, Syria Planum, Claritas Fossae, Volcanoes, Arisa Mons
Scientific paper
Ancient slope directions in the Martian Tharsis region are compared with new earth-based radar observations in an effort to detect tectonic deformations. Data were taken from 20-150 pixel/m Viking Orbiter images and from 200 m orthophotomosaics prepared by the U.S. Geological Survey. The positions of 475 lava flows were determined, covering widths between 5-10 km on higher slopes and 15-35 km on lower slopes. Most of the flows originated from four volcanos, although none issued from Olympus Mons, which makes up the central portion of the Plateau. Further radar-derived topography was made of, Arsia Mons and Syria Planum in latitudes 14-21 deg S to find differences in regional gradients and the lava flow directions, to determine if deformations occurred after the lava flows. A lithospheric stability is concluded, indicating no tectonic upheavals since the days of Tharsis Plateau volcanic activity.
Downs George S.
Mouginis-Mark Peter J.
Zisk Stan H.
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