Circular Feature Among Dunes of the Great Sand Sea, Egypt

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Science  24 Jul 1981:
Vol. 213, Issue 4506, pp. 439-440
DOI: 10.1126/science.213.4506.439


A circular crater, about 4 kilometers in diameter and located at 24.2°N, 26.4°E, was discovered in Landsat images among the linear dunes of the Great Sand Sea, Egypt. The crater has a sharp and crenulated rim crest, a terraced wall, a discontinuous inner structure (approximately 1.6 kilometers in diameter), and a few rim blocks. Its morphological and morphometric characteristics are similar to those of meteorite impact craters and other circular structures on the moon and the terrestrial planets. Because of its interaction with windblown sand, it is particularly comparable with craters on Mars.