DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Granite outcrop. Granite is an intrusive igneous rock, formed when volcanic magma solidifies under pressure deep in the Earth's crust. It consists of medium- to large-sized mineral crystals. This outcrop has deep fissures, and a smooth surface due to weathering and erosion. Photographed at William Bay, West Australia.
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