Dark xenoliths were trapped in speckled white igneous rock in this 6-foot wide boulder at Treasure Lakes, in Inyo National Forest, California, USA. A xenolith is a piece of rock trapped in another type of rock. Usually, a xenolith is a rock embedded in magma while the magma was cooling. Magma is the molten rock beneath the Earth's crust that emerges as lava during a volcanic eruption. The rock that forms from cooled magma is called igneous rock. Xenoliths are different types of rock embedded in igneous rock. From Bishop Pass Trailhead at South Lake, we dayhiked 7.2 miles round trip with 2040 feet gain to a third lake above the first two Treasure Lakes. In the evening, we car-camped at Willows Campground.
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