This Ice Cliff is One of the Few Places With Exposed Water ice in the Mid-Latitudes on Mars. It's Probably Tens of Millions of Years old

Because of the orbiters and landers that have studied Mars over the years, scientists have learned that water ice is very likely locked away just under the surface throughout the planet’s mid-latitudes. These regions - especially in the northern hemisphere — are mostly covered with smooth material and scientists suspect ice is just underneath. But …