Week of 16 January 2017 

Bedrock Exhumed from the Deep
Bedrock Exhumed from the Deep
Martian craters provide what tectonic mountain building and man’s TNT cannot: crater-exposed bedrock outcrops.
The Beauty of Layered Stratigraphy
The Beauty of Layered Stratigraphy
The layered bedrock in this image was brought from several kilometers of depth during the formation of a crater in the volcanic plains of Lunae Planum.
The Changing Dunes of Wirtz Crater
The Changing Dunes of Wirtz Crater
On Mars, most sand is composed of dark basalt, a volcanic rock, so dunes here are darker than the ones on Earth.
Crater with Exposed Layers
Crater with Exposed Layers
Understanding the geology around impact craters can help scientists on Earth better understand what the walls of impact craters on Mars expose.
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