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In geological terms, a crack or fracture in the earth's surface is a fault (as in the San Andreas Fault).

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7y ago
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12y ago

it is a fault. that's like two plates moving apart from another aka an earth quake(plate tectonic) it also causes a rift valley to form and can turn into a lake and some times an ocean.

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Q: What is a crack or opening of the earth's crust?
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