Mars Unearthed
041 Semeykin Crater
From: M1300267
Click on any of the images below to view the original and ancillary data at Malin Space Science Systems
From: M1300268 Context Image
For comparison, here is a photo from Hawaii showing the steam that results from groundwater reacting with a subsurface lava tube. (Image flipped horizontally for easier comparison). See also -- #125