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As parent rock is metamorphosed, it progresses from low-grade to high-grade meta

ID: 287317 • Letter: A

Question

As parent rock is metamorphosed, it progresses from low-grade to high-grade metamorphic rock. High 10 White mica (mainly muscovite Gräde High 15 Garnet Kyanite 10 35 Sillimanite 12 Albite (sodium plagioclase) 200 400 600 800 1000 Temperature (C) With increasing metamorphic grade, mineral composition changes. Refer to both diagrams from the previous questions. If you find the mineral staurolite in a rock, what rock would it likely be? Refer to both diagrams from the previous questions. What minerals would least likely be part of the rock phyllite? slate schist biotite white mica (muscovite) sillimanite Albite No answer text provided. True or False: the reason new minerals can form under metamorphic conditions is because the old minerals melt and new minerals crystallize from the melt. True False

Explanation / Answer

Staurolite is found in Schist.

This statement is true as metamorphic changes involve chemical reactions between existing minerals. Metamorphism is a physico-chemical change of the existing minerals.

Silliminite is least likely to be part of the rock phyllite.