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Questions and Answers
What are the three defined metamorphic zones based on?
What are the three defined metamorphic zones based on?
- Geological age
- Magnetic properties
- Temperature and pressure conditions
- Presence of index minerals (correct)
What marks the boundary between each metamorphic zone?
What marks the boundary between each metamorphic zone?
- Appearance or disappearance of an index mineral (correct)
- Fracture density
- Changes in rock color
- Magnetic anomalies
What do Isograds mark in metamorphic zones?
What do Isograds mark in metamorphic zones?
- Last appearance of an index mineral
- First appearance of an index mineral (correct)
- Temperature only
- Pressure only
What does metamorphic grade describe?
What does metamorphic grade describe?
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What are Isograds defined by?
What are Isograds defined by?
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