Question

Tectonites which allow the rock to split into plate-like sheets are called:

• A. L-tectonites
• B. S-tectonics
• C. LS-tectonites
• D. SL-tectonites

Hint:

S = Surface or Sheet; S-tectonites show planar deformation fabric.

Answer 1

The Correct Option is B

To determine the correct type of tectonite that allows the rock to split into plate-like sheets, let's analyze the options:

1. Understanding Tectonites:
Tectonites are deformed rocks with a fabric that reflects their deformation history. They are classified based on their dominant fabric:

• L-tectonites: Linear fabrics dominate (e.g., stretched minerals).
• S-tectonites: Planar fabrics dominate (e.g., foliation).
• LS-tectonites: Both linear and planar fabrics are present but planar is dominant.
• SL-tectonites: Both linear and planar fabrics are present but linear is dominant.

2. Key Observation:
The ability to split into plate-like sheets indicates a strong planar fabric (foliation), which is characteristic of S-tectonites.

3. Why Not Others?
- L-tectonites lack strong planar fabrics.
- LS and SL-tectonites have mixed fabrics but are not primarily known for plate-like splitting.

Final Answer:
The correct answer is S-tectonites.