This image from the HiRISE camera on the MRO shows an impact crater that is estimated to have been formed some time between February and July of 2005. This feature is in an equatorial highland region of Mars.
The colors here are not true to life…they indicate material composition and density more than actual color as seen by the human eye.
What I find equally if not more interesting is the consistent north-south direction of the erosion around all the craters in the region. I have to assume this comes from either steady wind erosion or else a massive amount of lava – or water – flow in this area. Whatever caused it, it was both a powerful and widespread force of nature in Mars’ past.
Image credit: NASA/JPL/University of Arizona
UPDATE: As far as the erosion patterns are concerned, I found out that they are caused by winds:
“Those features are windblown material, and their orientation is a result of the prevailing wind direction.” – JPL’s Dr. Candice Hansen, HiRISE Deputy Principal.