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The most recent visible tectonic features in the Astypalaea region in the southern hemisphere of Europa are a set of cycloidal ridges, three of which have cross-cutting relationships that define a time sequence for their formation. The longitudes at which each of these features formed, which may be different from the current location due to rotation of Europa, are constrained by models of their formation...
The identification of terrains on images of Europa is highly dependent on the image resolution and illumination angle, both of which are quite variable due to the observational selection constraints of the Galileo mission. Higher resolution images allow for the identification of smaller patches of chaotic terrain, which are indistinguishable from surrounding tectonic terrain in most other Galileo...
Lithospheric dilation on Europa has occurred at ridges, bands, and various hybrid lineaments on a global scale over a large part of the geological age of the surface. Dilational ridges (Class 2 in the R. Greenberg et al. (1998, Icarus135, 64-78) taxonomy) are elevated, are usually a few kilometers across, and may have a lineated or hummocky interior and a pronounced medial groove. Bands are lower...
Diurnal tides due to orbital eccentricity may drive strike-slip motion on Europa through a process of ''walking'' in which faults open and close out of phase with alternate right- and left-lateral shear. Mapping of five different regions on Europa has revealed 121 strike-slip faults, including Astypalaea Linea, a 800-km-long fault with 42 km of right-lateral offset. At high southern latitudes near...