Gasa Crater

The smaller crater within the larger crater is called Gasa Crater, as shown in this image from NASA 2001 Mars Odyssey spacecraft.

The smaller crater within the larger crater is called Gasa Crater (the larger crater is unnamed). Gullies dissect the inner rims of both craters. Orbit Number: 65538 Latitude: -35.6842 Longitude: 129.44 Instrument: VIS Captured: 2016-09-22 06:02 http://photojournal.jpl.nasa.gov/catalog/PIA21158