Fig. 1: Surface imagery comparison of a double ridge on Europa and Earth.
From: Double ridge formation over shallow water sills on Jupiter’s moon Europa
a Europan double ridge in a panchromatic image from the Galileo mission (image PIA00589). The ground sample distance is 20 m/pixel. b Greenland double ridge in an orthorectified panchromatic image from the WorldView-3 satellite taken in July 2018 (© 2018, Maxar). The ground sample distance is ~0.31 m/pixel. Signatures of flexure are visible along the ridge flanks, consistent with previous models for double ridges underlain by shallow sills28.
