Earth

What is a sudden collapse and downward motion of ice and rocks down a mountainside?

More Questions from Earth
What natural disaster is said to be 100 times greater than an atomic bomb?
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Whose calculation of the size of the earth's diameter was almost exact?
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Yosemite National Park is an easily recognizable part of what batholiths?
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What are the rocks that glaciers carry with them to far places called?
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Mary Anning was the first to discover complete fossils of which prehistoric marine reptile?
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What is the nickname of Katmai in Alaska?
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How long does it take earth to revolve around the sun?
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What is hail made of?
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