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Small volcanic edifices and volcanism in the plains of VenusThe different types of eruption that have occurred over time in the Venusian plains are considered. The most extensive volcanic units consist of flood lavas, the largest of which have volumes of the order of thousands of cubic kilometers. They are inferred to have erupted at high effusion rates, and they exhibit a range of radar backscatter characteristics indicating different surface textures and ages. Small edifices on the plains occur mainly in clusters associated with fracture belts. The majority are shield volcanos that may be up to a few tens of kilometers across but are generally 10 km or less in diameter. Volcanic domes have diameters up to several tens of kilometers and volumes of the order of 100 cu cm. These are interpreted as being constructed of lava erupted with a relatively high effective viscosity and thus possibly composed of more silicic lava. For many domes, the flanks were unstable during and after eruption and experienced gravity sliding that produced steep scalloped outer margins.
Document ID
19930030855
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Guest, John E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bulmer, Mark H.
(London Univ. Observatory, United Kingdom)
Aubele, Jayne
(Brown Univ. Providence, RI, United States)
Beratan, Kathi
(JPL Pasadena, CA, United States)
Greeley, Ronald
(Arizona State Univ. Tempe, United States)
Head, James W.
(Brown Univ. Providence, RI, United States)
Michaels, Gregory
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Weitz, Catherine
(JPL Pasadena, CA, United States)
Wiles, Charles
(London Univ. Observatory, United Kingdom)
Date Acquired
August 16, 2013
Publication Date
October 25, 1992
Publication Information
Publication: Journal of Geophysical Research
Volume: 97
Issue: E10
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
93A14852
Funding Number(s)
CONTRACT_GRANT: JPL-958880
Distribution Limits
Public
Copyright
Other

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