Mathematics – Logic
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992lpico.789q..83n&link_type=abstract
In Lunar and Planetary Inst., Papers Presented to the International Colloquium on Venus p 83 (SEE N93-14288 04-91)
Mathematics
Logic
Geological Faults, Geological Surveys, Landforms, Plains, Planetary Geology, Planetary Mapping, Terrain, Venus Surface, Volcanoes, Cones (Volcanoes), Morphology, Subsidence, Valleys
Scientific paper
New preliminary geologic maps of C1 sheets 15N283 and 00N283 were compiled according to Magellan data. The oldest terrains are tesserae that have fragmentlike shapes. Its margins are partly buried by younger plain materials. Volcanic plains are the dominant types of terrains. There are many different volcanic features on plains: radar-bright and -dark flows and spots, shield volcanos, volcanic domes and hills with varied morphology, and coronalike constructions. Devana Chasma rift crosses the surface between Beta Regio and Phoebe regio. The rift's normal faults dissect volcanic plains and shield volcanos. The rift valleys are relatively young structures. According to structural analysis of the rift valleys we conclude the rift originated due to 5-10 percent crustal extension and crustal subsidence. Devana Chasma rift is characterized by shoulder uplifts.
Burba George A.
Nikishin Anatolii M.
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