The Bruce Murray Space Image Library
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NASA / JPL / Prockter and Pappalardo
In both versions, the bold criss-crossing ridges believed to result from the upwelling of new material through cracks in the surface ice are apparent. But more easily seen on the right are recently recognized gentle rises and dips, about 15 kilometers across, which likely formed as the icy surface was compressed by the addition of the new material. Further evidence that stress is folding Europa's surface is offered by the presence of smaller cracks and wrinkles more easily seen on the left. These span the width of the broad swells suggestive of anticlines and synclines familiar to geologists on planet Earth.
Original image data dated on or about September 26, 1998
Explore related images: Jupiter's moons, Europa, pretty pictures, Galileo, geology, ice worlds
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