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Contents of 6.9 What was the rock before it was metamorphosed?

• The parent rock is interpreted from the mineral composition of the metamorphic rock (as long as fluids were not a major part).
• The major elements in the metamorphic minerals are similar to those found in the parent rock.
• If the parent rock contains primarily one mineral, the metamorphic rock will likely contain a recrystallized metamorphic version such as marble from limestone, or quartzite from sandstone.

6.9 What was the rock before it was metamorphosed?