The Richat Structure of Mauritania has captured the attention of astronauts for about as long as NASA has sent humans into orbit around Earth. This circular geologic feature is thought to be caused by an uplifted dome—geologists would classify it as a domed anticline—that has been eroded to expose the originally flat rock layers. In this type of geologic structure, rocks exposed in the center of the “bullseye” are older than rocks forming the outer rings. This structure measures 45 kilometers (28 miles) across and is made up of igneous and sedimentary rocks (texto de https://earthobservatory.nasa.gov/images/92071/richat-structure)
Localización https://osm.org/go/a36ocAf--?layers=C
geo:21.1274,-11.4033?z=12
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