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Post by Mars Ancient News on Sept 20, 2015 6:12:38 GMT -5
Definition: A quadrilateral with two distinct pairs of equal adjacent sides.
CTX: viewer.mars.asu.edu/planetview/inst/ctx/P20_008739_2013_XN_21N191W#P=P20_008739_2013_XN_21N191W&T=2
Coordinates: 18°41'15.33"N 168°21'19.63"E
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