Computer Science
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321...49m&link_type=abstract
Nature (ISSN 0028-0836), vol. 321, May 1, 1986, p. 49-51.
Computer Science
55
Crustal Fractures, Europa, Satellite Surfaces, Structural Properties (Geology), Tides, Stress Distribution, Tensile Stress, Thematic Mapping, Jupiter, Satellites, Tidal Effects, Europa, Fracturing, Hypotheses, Fractures, Formation, Maps, Lineaments, Stress, Rotation, Patterns
Scientific paper
The lineaments on Europa are discussed in terms of the orientation of the lineaments relative to the tensile stress trajectories due to tidal distortions and to nonsynchronous rotation. The cracks are noticeable by their darker albedo compared to the presumed water ice surrounding them. The stress trajectories for tidal distortion of a thin elastic shell are superimposed on Mercator projection maps of the lineaments. It is shown that the lineaments are mainly oriented at high angles to the tensile stress trajectories that would be expected for regularly occurring nonsynchronous rotation, i.e., extensional fractures would appear. The reorientation motions which would cause the fractures are estimated. It is suggested that the fractures occur episodically to release stresses built up on the tensile surface of the crust during the continuous nonsynchronous rotation of Europa.
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