Exam 7: Metamorphism and Metamorphic Rocks

Where are the oldest metamorphic rocks in Canada (4.28 billion years)?

Chemically active fluids like ________ tend to transport ions and mineral components and their activity ________ with increasing temperature.

Which facies would you expect to find with intermediate temperature-pressure regional metamorphism?

Which is a nonfoliated metamorphic rock consisting mostly of calcite?

Which facies would you expect to find with hydrous low temperature-low pressure burial metamorphism?

Why so some marbles appear banded?

Three major factors involved in metamorphism are elevated temperature, elevated pressure, and the chemical action of hot fluids.

What effect does the application of directed pressure have on the texture of rocks.

What is the end product (highest grade)reached by subduction zone metamorphism of basalt?

What contact metamorphic rock can exhibit a porphyroblastic texture?

A ________ forms at very high pressures but relatively low temperatures associated with subduction of oceanic crust and sediments.

Where does burial metamorphism occur, how is it recognized and what conditions does it represent?

Regional metamorphism of a granite would produce a ________.

What are the aluminosilicate minerals (Al₂SiO₅ )and how are they formed and distinguished?

Is the texture of a metamorphic rock always indicative of the conditions (degree of metamorphism)under which it formed? (Hint: Think about the protolith and how it may influence the resulting metamorphic rock.)

High-grade, regional metamorphism produces significant and recognizable changes in the textures and mineral compositions of rocks.

Which facies would you expect to find with the development of glaucophane at high pressure?

What are two ways that pressure (stress)drives metamorphism?

Long linear metamorphic fold belts mark ________.

Muscovite is a hydrous sheet silicate typical of low metamorphic grades.