Layered Rocks near Mount Sharp on Mars
The leading hypothesis about how these rocks on Mars became layered is due to an ancient Martian lake that kept evaporating and refilling over 10 million years. Today, this lake has remained dry and empty of water for billions of years. This image was taken last November by the Curiosity rover and the picture shows the one-meter wide Whale Rock (part of the Pahrump Hills outcrop at the base of Mount Sharp). The rocks display cross-bedding (rock with angled layers) which were likely facilitated by waves of sand.
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