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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...
The characteristics of chaos regions on Europa suggest they may be sites of melt-through from below. They are wide ranging in size, location, and age. The largest are hundreds of kilometers across. Most are similar to Conamara with a matrix reminiscent of frozen slush and often rafts of preexisting crust. Edges are of two types: ramps, perhaps the tapering of crustal thickness to zero, or cliffs,...