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Evidence of Volcanic Explosion
granular textures and a bomb sag

The lower coarse-grained unit shows granular textures toward the bottom of the image and massive textures. Also shown is a feature interpreted to be a "bomb sag," which is 4 centimeters across. This false color image was obtained using Spirit's panoramic camera.

+ High resolution JPEG

Image Credit: NASA/JPL-Caltech/USGS/Cornell