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Europa: Initial Galileo Geological Observations

Icarus

By:
, , , , , , , , , , , , , , , , , , , , and
DOI: 10.1006/icar.1998.5969

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Abstract

Images of Europa from the Galileo spacecraft show a surface with a complex history involving tectonic deformation, impact cratering, and possible emplacement of ice-rich materials and perhaps liquids on the surface. Differences in impact crater distributions suggest that some areas have been resurfaced more recently than others; Europa could experience current cryovolcanic and tectonic activity. Global-scale patterns of tectonic features suggest deformation resulting from non-synchronous rotation of Europa around Jupiter. Some regions of the lithosphere have been fractured, with icy plates separated and rotated into new positions. The dimensions of these plates suggest that the depth to liquid or mobile ice was only a few kilometers at the time of disruption. Some surfaces have also been upwarped, possibly by diapirs, cryomagmatic intrusions, or convective upwelling. In some places, this deformation has led to the development of chaotic terrain in which surface material has collapsed and/or been eroded. ?? 1998 Academic Press.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Europa: Initial Galileo Geological Observations
Series title:
Icarus
DOI:
10.1006/icar.1998.5969
Volume
135
Issue:
1
Year Published:
1998
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Icarus
First page:
4
Last page:
24
Number of Pages:
21