erosion
August 28, 2012
A piece of Gale crater, Mars: Here is a tiny piece of feathery terrain way up high on Mt. Sharp, the mountain that Curiosity will one day climb. This is a special unit of fine-grained material that has weathered into […]
August 19, 2012
A piece of Gale crater, Mars: What exactly is Mt. Sharp, the big mountain Curiosity is set to climb up? Here’s a picture of what it is: layers and layers and layers and layers. And more layers. Probably sedimentary, but […]
August 13, 2012
A piece of Gale crater, Mars (Aug. 13, 2012): Here is the wall of a large ravine cut into Mt. Sharp, the mountain of layered and eroded sediments that Curiosity will climb. Long ago, this ravine was cut by water, […]
August 10, 2012
A piece of Gale crater, Mars: These are rocks on Mount Sharp, where the Curiosity rover will be headed in the coming months. Like many of the surfaces in Gale crater, these have been streamlined by sandblasting over the eons. […]
August 3, 2012
A piece of Mars: Compare this with my post five days ago and you might think the scenes are similar. In fact they’re not. In the previous case sedimentary layers were carved out by the wind, leaving behind swirly patterns […]
July 29, 2012
A piece of Mars: When the wind sandblasts at layered rocks, some pretty swirly patterns emerge. These are flat layers that take on a stacked wedding-cake appearance on an outcrop elongated by the wind. The direction of the stacks indicates […]
July 26, 2012
A piece of Mars: Wind streaks are a common sight on Mars. They are formed either by the wind blowing stuff away or blowing stuff in, and it can be quite difficult to tell which is which. In this case, […]
July 9, 2012
A piece of Mars: Way up in the cold northern plains of Mars, some of the dunes are being blown away slowly by the wind. Here are some that are barely there yet — dark patches of sand in the […]
June 20, 2012
A piece of Mars: The thin stripes within stripes are the bones of dunes. You’re seeing old dunes that have had their tops eroded away so you’re seeing into their insides, as if you were dissecting them in a biology […]