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Why do some rock layers fold and others break into faults when they are subjected to crustal forces?

April 26, 2017break crustal faults fold forces layers rock subjected

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Why do some rock layers fold and others break into faults when they are subjected to crustal forces?

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Rocks break or deform in a brittle manner at low temperatures, low pressures or when the strain rate or total strain is very high. Rocks fold or deform in a ductile manner at high temperatures, high pressures or when the strain rate or total strain is low.