Giordano Bruno Whorl

swirl of solidified melted rock
 NASA/GSFC/Arizona State University
November 27, 2017
CreditNASA/GSFC/Arizona State University
Historical DateNovember 9, 2010
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Impact melt forms a swirled feature in Giordano Bruno crater, as seen in this image from NASA's Lunar Reconnaissance Orbiter. The area shown is a little more than half a mile (about 1 kilometer) across. This spiral-shaped feature may have formed due to shear stress created when molten impact melt flowed at different speeds (probably caused by drag from the pool floor or an obstacle within the pool). Learn more.