blow hole

• by Bjfoga

  lower right corner appears to be an expulsion point.

  Posted March 16, 2016 2:25 AM

• by wassock moderator

  Hi There and welcome - yes that's what this is mainly about here. The surface you are looking at is covered in a layer of CO2 ice and gas escappes thrpough it bringing dust with it to make the fans and blotches you are asked to mark. Therte's more about this process here

  Posted March 18, 2016 4:53 PM