An Unknown Crystal Exhibits Positive Birefringence

question 19

Multiple Choice

An unknown crystal exhibits positive birefringence. It is rhomboid in appearance. What is its most likely identification?

• A) Monosodium urate
• B) Starch particles
• C) Cholesterol crystals
• D) Calcium pyrophosphate

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Definitions:

Vertical Tension

Stress that acts upwards or downwards along a vertical plane, affecting the Earth's crust and can lead to the formation of geological features.

Dip-Slip Fault

A fault on which the relative movement is parallel to the dip of the fault.

Strike-Slip Fault

A type of fault where two blocks of the Earth's crust slide past one another horizontally, with little to no vertical movement.

Normal Fault

A type of fault where the hanging wall has moved downward relative to the footwall due to tensional forces.