These small spherules on the Martian surface are near Fram Crater, visited by NASA Mars Exploration Rover Opportunity during April 2004. The area shown is 1.2 inches 3 centimeters across.
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Details
Title: Martian Concretions Near Fram Crater
Creator: NASA/JPL-Caltech/Cornell/USGS
Date Created: 2015-01-27
Rights: JPL
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