Mathematics – Logic
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sosyr..29..335b&link_type=abstract
Solar System Research, Vol. 29, No. 5, p. 335 - 345
Mathematics
Logic
1
Venus Surface: Structure, Venus Surface: Ages, Venus Surface: Radar Observations
Scientific paper
The photogeologic analysis of radar images of the Maxwell Montes massif and adjacent terrain, obtained by the Magellan spacecraft (SC), has shown that the northern part of this massif is disturbed by a fault, presumably classified as an upthrust with a left-side strike-slip component. This fault in strike merges into wide ridges that complicate the surface of Lakshmi Planum and Sedna and Snegurochka Planitias. Obviously, the upthrust with the strike-slip component is formed by the same compression deformations as the ridges, the latter being close in age to the average age of Venus' surface. This allows to conclude that the Maxwell Montes massif has existed in a state similar to the modern one, even for some hundreds of millions of years, which implies a low efficiency of gravitational relaxation of the massif at this stage of the planet's geologic history. This conclusion can probably be applied to the other prominent highlands and depressions in the Venusian relief. The areas in the northwestern part of Maxwell Montes found in the course of photogeologic analysis and possessing relatively low radiowave backscattering are, apparently, composed of rocks whose composition differs from that of the remaining part of the massif, which is characterized by very high radar brightness.
Basilevskij A. T.
Head James W.
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