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Europa: Initial Galileo Geological Observations
Open accessAbstract
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.
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Cited by
Evidence for a subsurface ocean on Europa
Carr, M. H., Belton, M. J. S., Chapman, C. R., Davies, M. E., Geissler, P., Greenberg, R., McEwen, A. S., Tufts, B. R., Greeley, R., Sullivan, R., et al. (1998) · Nature · doi:10.1038/34857 · Cited by 593
Self-citationBiogenesis and Early Life on Earth and Europa: Favored by an Alkaline Ocean?
Kempe, S., & Kazmierczak, J. (2002) · Astrobiology · doi:10.1089/153110702753621394 · Cited by 57
Metadata
- Authors
- Greeley, R., Sullivan, R., Klemaszewski, J., Homan, K., Head, 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.
- Venue
- Icarus
- Publisher
- Elsevier BV
- Published
- 1998-09
- Volume
- 135
- Issue
- 1
- Pages
- 4-24
- ISSN
- 0019-1035 (ISSN-L)
- OpenAlex
- W2117234027
- Cited by
- 158
- References
- 0
- FWCI
- 12.09
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Greeley, R., Sullivan, R., Klemaszewski, J., Homan, K., Head, 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., . . . Tufts, R. (1998). Europa: Initial Galileo Geological Observations. Icarus. https://doi.org/10.1006/icar.1998.5969
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