Mars rover sits on ancient beach

NASA has reported that the Mars rover Opportunity was currently parked on a section of mars that was ones the shores of a saltwater sea. The Mars rover Opportunity has been studying the rocks in a small crater on the surface for several months. Evidence from that investigation has shown that the rocks in that area ones had water that slowly seeped into them. This suggests that the rocks were once laid down with a liquid layer on top. This confirms the belief that there was either a large sea or a series of pools located in the area. It is also possible that the patterns were seen due to the presence of an ice sheet above the studied location. The rocks at this location are finely layered, a sign for sedimentary rocks. These rocks didn't have to be formed by water, though. It is also possible that they were formed by wind.

http://news.bbc.co.uk/1/hi/sci/tech/3560867.stm