21 January 2004
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows light-toned, layered, sedimentary rock outcrops in south-central Becquerel Crater in western Arabia Terra near 21.3°N, 8.4°W. The layered material may have been deposited in an intracrater lake, early in martian history. The material has subsequently been exposed and eroded by wind. Dark sand dunes have accumulated along the southern margin (bottom of image) of the outcrop exposure. The image covers an area about 3 km (1.9 mi) wide and is illuminated by sunlight from the left/lower left.