Moving to another question will save this response. stion 2 What causes retrogra

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Moving to another question will save this response. stion 2 What causes retrograde metamorphism? Question 21 1 points Save a. The rewind button . b. constantly increasing pressure and temperature causing the crystal structure to change and the mineral to change into a polymorph C) c. a decrease in pressure and possibly also in temperature causing the crystal structure to change d. It is when the rock is metamorphosing slower than the rock in the surrounding areas, sort of like planets with retrograde orbits and the mineral to change into a poymorph "K Question 2 of8 Moving to another question will save this response.

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Question 2

Option c is correct

Changes at or just beneath Earth's surface due to weathering or diagenesis are not classified as metamorphism. Metamorphism produced with increasing pressure and temperature conditions is known as prograde metamorphism. Conversely, decreasing temperatures and pressure characterize retrograde metamorphism.

Retrograde metamorphism, the response of mineral assemblages to decreasing temperature and pressure; metasomatism, the metamorphism that includes the addition or subtraction of components from the original assemblage; poly-metamorphism, the effect of more than one metamorphic event.

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