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The altered rhyolite lava flows are believed to be the yellow rocks that gave Yellowstone River it's name (translated from a Native American name). The National Park is, of course, named for that river.

Rhyolite is a felsic rock, meaning it is rich in silica and aluminum. It is very similar to granite, except it has smaller grains.

2007-03-19 14:01:36 · answer #1 · answered by Now and Then Comes a Thought 6 · 0 0

The continent? Its in North America, in the USA.

2007-03-19 19:21:39 · answer #2 · answered by Mr.Robot 5 · 0 0

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