1. Answer the following: A. What rock types are the protolith for perlites? B. W
ID: 292534 • Letter: 1
Question
1. Answer the following:A. What rock types are the protolith for perlites?
B. What are 3 foliated pelitic metamorphic rocks?
C. What rock types comprise mafic protoliths?
D. What are the protoliths for calc-silicate rocks?
1. Answer the following:
A. What rock types are the protolith for perlites?
B. What are 3 foliated pelitic metamorphic rocks?
C. What rock types comprise mafic protoliths?
D. What are the protoliths for calc-silicate rocks?
A. What rock types are the protolith for perlites?
B. What are 3 foliated pelitic metamorphic rocks?
C. What rock types comprise mafic protoliths?
D. What are the protoliths for calc-silicate rocks?
Explanation / Answer
1A. The protoliths for pelitic rocks are shales (aluminous rocks), not sandstones (quartzofeldspathic rocks) .
1B. Slate, schist, and gneiss are three common foliated metamorphic rocks.
1C.Basalt is the most common mafic protolith.
1D.A calc–silicate rock is a rock produced by metasomatic alteration of existing rocks in which calcium silicate minerals such as diopside and wollastonite are produced. Calc–silicate skarn or hornfels occur within impure limestone or dolomite strata adjacent to an intruding igneous rock.
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