Interlocking, aligned minerals, give a layered appearance to the rock and a nice

Question

Interlocking, aligned minerals, give a layered appearance to the rock and a nice shine. Three different types of minerals are easily visible.

Mineral A: Red in color and a well formed 12 sided crystal shape. Has a glassy luster to it.

Mineral B: Black, shiny and breaks into sheets.

Mineral C: Silver, shiny, and breaks into sheets.

1. What is Mineral A?

2. What is Mineral B?

3. What is Mineral C?

4. What is the name of this rock?

5. How did sample this rock sample from Chasm Lake form? Be sure to refer to the directions to ensure that all information is included for a complete answer and that it is presented in three sentences or less.

Explanation / Answer

1) mineral A might be Garnet, since it has 12 sided faces Mineral B might be biotite, since it has black color and sheet structure Mineral C might be muscovite, since it has light color and sheet structure 4) the composition of magma suggest that it is Garnet mica schist 5) it has formed by thet continuous increasing in metamorphism of shale ranging from slate to phyllite and phyllite to schist

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