Mathematics – Logic
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..883b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 10, p. 883-886.
Mathematics
Logic
31
Planetary Craters, Planetary Geology, Venus Surface, Volcanoes, Photogeology, Planetary Mantles, Venus, Alta Regio, Age, Rifting, Volcanism, Photogeology, Stratigraphy, Surface, Features, Impact Craters, Resurfacing, Model, Dali Chasma, Ganis Chasma, Sitwell, Von Schuurman
Scientific paper
An estimation of the age of rifting and associated volcanism in Atla Regio is carried out based on photogeologic analyses of the stratigraphic relationships between rift-associated features and impact craters which have associated radar-dark paraboloids. The association of impact craters with dark paraboloids indicates that at least the last stages of tectonic and volcanic rift-associated activity in Atla Regio are contemporaneous with the formation of impact craters young enough to preserve the associated dark paraboloids. If these craters represent the youngest 10 percent of the Venus crater population, as is believed, and the average of the Venusian surface is about 500 m.y., then the rifting and rift-associated volcanism in Atla Regio were active as recently as during the last 50 m.y. or so.
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