Question

Arrange following rock types from high grade to low grade metamorphism: A. Slate B. Gneiss C. Schist D. Shale E. Phyllite

• A. B, E, C, D, A
• B. B, C, E, A, D
• C. D, A, E, C, B
• D. C, B, E, A, D

Hint:

Remember: with increasing metamorphism, rocks progress from Shale $\rightarrow$ Slate $\rightarrow$ Phyllite $\rightarrow$ Schist $\rightarrow$ Gneiss.

Answer 1

The Correct Option is B

Step 1: Concept
Metamorphic Rock Classification.

Step 2: Meaning
Rocks are classified by their degree of metamorphism, from low-grade (least transformed) to high-grade (most transformed).

Step 3: Analysis
The sequence from high grade to low grade metamorphism is: Gneiss (B, highest) $\rightarrow$ Schist (C) $\rightarrow$ Phyllite (E) $\rightarrow$ Slate (A) $\rightarrow$ Shale (D, non-metamorphic sedimentary rock, lowest). The question asks for high to low, so: B, C, E, A, D.

Step 4: Conclusion
From highest to lowest grade of metamorphism: Gneiss $>$ Schist $>$ Phyllite $>$ Slate $>$ Shale. Final Answer: (B)