Photomicrograph of sphere and fragments in "orange" soil from Apollo 17
A photomicrograph of spheres and fragments in the "orange" soil which was brought back from the Taurus-Littrow landing site by the Apollo 17 crewmen. The sample in this picture, magnified 31.5 times, shows particiles in the 150-250 micron size range (fine sand). Finer particles, similar in size to particles making up silt, are more distinctly orange in color.
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