Which ones of the following are formed by brittle deformation?

Question

cdquestions Admin · Accepted Answer

Identifying Rocks Formed by Brittle Deformation

(A) Cataclasite: Correct. **Cataclasite** is a rock formed through **brittle deformation** when rocks undergo **faulting** and **fragmentation**.
(B) Breccia: Correct. **Breccia** forms from broken rock fragments caused by **brittle deformation**, typically resulting from **faulting** or **collapse**.
(C) Mylonite: Incorrect. **Mylonite** forms under **ductile deformation**, not brittle deformation. It is typically produced in **shear zones** under **high pressure and temperature** conditions.
(D) Gouge: Correct. **Gouge** is a fine-grained material formed by **brittle deformation**, particularly during **faulting**, where the material is ground into a fine powder.

Based on the above analysis, the correct answers are:

\[ \mathbf{(A),\ (B),\ \text{and}\ (D)} \]

Thus, the correct options are: (A), (B), and (D).

Answer

Cataclasite

Answer

<div>Breccia</div>

Answer

<div>Mylonite</div>

Answer

<div>Gouge</div>