Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept...37s&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 37-38 (SEE N92-10728 01-91)
Physics
Geophysics
Morphology, Planetary Evolution, Planetary Geology, Planetary Surfaces, Structural Properties (Geology), Venus (Planet), Deformation, Elongation, High Resolution, Tectonics, Topography, Troughs, Venera Satellites, Volcanology
Scientific paper
Coronae and ovoids on Venus were first identified in Venera 15/16 data. They are distinctive and apparently unique to the planet, and may be important indicators of processes operating in the Venusian mantle. Magellan images have provided the first high resolution views of coronae and ovoid morphology. Herein, the general geologic character is described of coronae and ovoids, and some inferences are drawn about their geologic evolution. Coronae are circular to elongate features surrounded by an annulus of deformational features, with a relatively raised or indistinct topographic signature and, commonly, a peripheral trough or moat. Ovoids are circular to elongate features other than coronae with either positive or negative topographic signatures, associated with tectonic deformation and volcanism. The relationship of these two geologic features to each other and to Venusian geology is briefly discussed.
Bindschadler Duane L.
Janes Daniel M.
Schubert Gerald
Sharpton Virgil L.
Squyres Steven W.
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