The geology of Venus according to the results of an analysis of radar images obtained by Venera-15 and Venera-16 Preliminary data

Details The geology of Venus according to the results of an analysis of radar images obtained by Venera-15 and Venera-16 Preliminary data The geology of Venus according to the results of an analysis of radar images obtained by Venera-15 and Venera-16 Preliminary data

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984geokh.....1811b&link_type=abstract

Geokhimiia (ISSN 0016-7525), Dec. 1984, p. 1811-1820. In Russian.

Mathematics

Logic

Image Analysis, Planetary Geology, Planetology, Radar Imagery, Venus Surface, Impact Damage, Planetary Evolution, Surface Properties, Tectonics, Venus Probes, Volcanoes

Scientific paper

A preliminary geological-morphological analysis of radar images of the surface of Venus is presented. The analysis permitted the subdivision of geologic formations into the following groups: volcanic, volcanic-tectonic, and impacted. It is shown that volcanic plains of low and average hypsometric levels, and the high plateau Lakshimi were formed mainly by extensive basalt effusions, with the possible contribution of pyroclastic and aeolian sediments. Volcanic and tectonic features were found in the arched uplifts of the Beta Regio and Bell Regio, and in many ovoidal features of 150-600 km diameter which resembled the ovoidal structures of the Early Precambrian era on earth. The impact craters on Venus resembled the impact craters of other planets. On the basis of crater density measurements, the age of formation of the volcanic plains is estimated to be from 0.5 to 1 billion years. No high-crater-density areas were identified with ages corresponding to periods of heavy bombardment.

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