Europa: Initial Galileo Geological Observations

Greeley, R.; Sullivan, R.; Klemaszewski, J.; Homan, K.; Head, III, J. W.; Pappalardo, R. T.; Veverka, J.; Clark, B. E.; Johnson, T. V.; Klaasen, K. P.; Belton, M.; Moore, J.; Asphaug, E.; Carr, M. H.; Neukum, G.; Denk, T.; Chapman, C. R.; Pilcher, C. B.; Geissler, P. E.; Greenberg, R.; Tufts, R.

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.

Genre:

Article

ProdID:

70020687

Citation Author:

Greeley, R.; Sullivan, R.; Klemaszewski, J.; Homan, K.; Head, III, J. W.; Pappalardo, R. T.; Veverka, J.; Clark, B. E.; Johnson, T. V.; Klaasen, K. P.; Belton, M.; Moore, J.; Asphaug, E.; Carr, M. H.; Neukum, G.; Denk, T.; Chapman, C. R.; Pilcher, C. B.; Geissler, P. E.; Greenberg, R.; Tufts, R.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

Citation Issue:

Citation Keywords:

Citation Language:

English

Citation Larger Work Title:

Icarus

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

Citation Projection:

Citation Public Comments:

Citation Publisher:

Citation Series:

Citation Series Code:

Citation Series Number:

Citation Search Results Text:

Europa: Initial Galileo Geological Observations; 1998; Article; Journal; Icarus; Greeley, R.; Sullivan, R.; Klemaszewski, J.; Homan, K.; Head, III, J. W.; Pappalardo, R. T.; Veverka, J.; Clark, B. E.; Johnson, T. V.; Klaasen, K. P.; Belton, M.; Moore, J.; Asphaug, E.; Carr, M. H.; Neukum, G.; Denk, T.; Chapman, C. R.; Pilcher, C. B.; Geissler, P. E.; Greenberg, R.; Tufts, R.