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Sinkholes. Sinkhole: a hole that opens up suddenly in the ground Sinkholes are formed by weathering. Sinkholes occur where land above weathered rock sinks into a hole in the ground. Sinkholes are fast changes to Earth’s surface.
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Sinkholes Sinkhole: a hole that opens up suddenly in the ground Sinkholes are formed by weathering.
Sinkholes occur where land above weathered rock sinks into a hole in the ground. • Sinkholes are fast changes to Earth’s surface.