Yosemite National Park, California 2008 -- This granite is part of a continuous geological formation called the Sierra Nevadas that line about 250 miles of the eastern edge of California. When continental plates collided about 200 million years ago, some hot magma rose to the surface and created volcanoes in the Cascades. More to the interior, the magma cooled into granite before the colliding plates pushed it to the surface here.
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