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The geology of GanymedeA broad outline of the geologic history of Ganymede is presented, obtained from a first attempt to map the geology on a global scale and to interpret the characteristics of the observed geologic units. Features of the ancient cratered terrain such as craters and palimpsests, furrows and troughs, are discussed. The grooved terrain is described, including its sulci and cells, and the age relation of these units is considered along with the structure and origin of this terrain. The Gilgamesh Basin and Western Equatorial Basin in the post grooved terrain are treated, as are the bright and dark ray craters and the regolith. The development of all these regions and features is discussed in context. For the regolith, this includes the effect of water migration, sputtering, and thermal annealing. The histories of the ancient cratered terrain, the grooved terrain, and the post grooved terrain are presented.
Document ID
19830035020
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Shoemaker, E. M.
(Geological Survey Flagstaff, AZ, United States)
Lucchitta, B. K.
(Geological Survey Flagstaff, AZ, United States)
Wilhelms, D. E.
(U.S. Geological Survey Flagstaff, AZ, United States)
Plescia, J. B.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Squyres, S. W.
(Cornell University Ithaca, NY, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Lunar And Planetary Exploration
Accession Number
83A16238
Funding Number(s)
CONTRACT_GRANT: NASA ORDER W-08395
CONTRACT_GRANT: NASA ORDER W-13130
CONTRACT_GRANT: NASA ORDER W-13709
Distribution Limits
Public
Copyright
Other

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