Crater and Caldera

This VIS image shows two circular features. The flat floored feature at the top of the image is the summit caldera of Elysium Mons and was formed by volcanic activity. The bowl-shaped feature next to the caldera is an impact crater.

Orbit Number: 65587 Latitude: 24.3248 Longitude: 146.842 Instrument: VIS Captured: 2016-09-26 07:14

http://photojournal.jpl.nasa.gov/catalog/PIA21159