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There are many types of metamorphic classifications
that geologists use. The one we use in this unit is simplified into
foliated and nonfoliated. We also group the minerals into
"families." "Clay Family" can include several
specific minerals, like kaolinite. For example, "Mica Family"
includes chlorite, mica, and biotite. "Feldspar Family"
includes orthoclase and plagioclase.
Metamorphic rocks use the minerals that are found
to help identify it to distinguish one from another. For example,
"schist" is a general term. A geologist would see which
minerals are dominate then name it depending on the most abundant
minerals.
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