Mathematics – Logic
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...43..302s&link_type=abstract
Icarus, vol. 43, Sept. 1980, p. 302-333.
Mathematics
Logic
26
Geomorphology, Io, Maps, Satellite Surfaces, Tectonics, Volcanoes, Craters, Frame Photography, Image Resolution, Lava, Plains, Silicates, Stratigraphy, Sulfur, Voyager 1 Spacecraft, Jupiter, Satellites, Io, Geology, Morphology, Tectonics, Maps, Origin, Surface, Terrain, Topography, Voyager 1 Mission, Spacecraft Observations, Volcanism, Photogeology, Composition, Craters, Sulfur, Stratigraphy, Plains, Photographs, Deposits, Flows, Distribution, Silicates, Mountains, Formation
Scientific paper
The geologic units, morphology and tectonics evident on a preliminary geological map obtained from best-resolution Voyager 1 images and a preliminary pictorial map of the surface of Io are discussed. Nine volcanic units are identified on the surface which are composed of mountain materials, intervent, layered and eroded layered plains, and wall and floor, pit crater flow, shield crater flow, fissure flow and crater cone units associated with volcanic vents, along with seven types of structural features. The cumulative volcanic crater size distribution of 170 Ionian vents with craters greater than 14 km is similar to that of impact craters on other solar system bodies, with a surplus of small craters and a preponderance of volcanic vents in the Io equatorial zone. The observed surface morphologies provide evidence for a mixture of silicates and sulfur as the dominant surface material. Lineaments and grabens are also apparent on the surface, in a common planetary grid pattern.
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