An Extra Kidney?
This image shows a possible volcanic vent located in the southeastern region of the Caloris basin. Though this irregularly shaped, rimless depression displays a more subtle color signature than other potential vents around Caloris, it is comparable in size to the kidney-shaped vent located in the southwestern region of Caloris.
Date acquired: October 12, 2012
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington