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Metamorphic Zones and Grades

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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?

Appearance or disappearance of an index mineral (correct)

Fracture density

Changes in rock color

Magnetic anomalies

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?

<p>Relative temperature and pressure conditions</p> Signup and view all the answers

What are Isograds defined by?

<p>"Mineral in" and "mineral-out" isograds</p> Signup and view all the answers

Metamorphic Zones and Grades

Choose a study mode

Podcast

Questions and Answers

What are the three defined metamorphic zones based on?

What marks the boundary between each metamorphic zone?

What do Isograds mark in metamorphic zones?

What does metamorphic grade describe?

What are Isograds defined by?

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