Metamorphic Pathways

Question 1

When rocks get covered up by thick layers of younger rocks, pressure and temperature rise

Answer 1

Burial metamorphism

Question 2

Plate boundaries can increase P more than T. T more than P, or both to an extreme level

Answer 2

Tectonic Metamorphism

Question 3

Burial metamorphism can happen…..

Answer 3

Anywhere

Question 4

Contact, Burial, Regional, Subduction

Answer 4

Metamorphic Pathways

Question 5

Temperature rises when rocks touch hot magma

Answer 5

Contant

Question 6

Pressure rises when rocks go down a deep-sea trench

Answer 6

Subduction

Question 7

Both P and T rise during continental collision

Answer 7

Burial –> Regional

Question 8

Rock whose index minerals tell us the metamorphic pathway

Answer 8

Metamorphic Facies

Question 9

Faces =

Answer 9

Clues to Tectonics

Question 10

Ancient plate boundaries leave metamorphic rocks behind

Answer 10

long after the mountains erode.

Question 11

Rock baked at low P to smooth porcelain texture by hot magma

Answer 11

Hornfels (contact zone facies)

Question 12

Colored by high-pressure index mineral kyanite

Answer 12

Blueschist

Question 13

Colored by moderate P/T index mineral chlorite

Answer 13

Green schist

Question 14

When you see a greenschist zone parallel to a blueschist zone in a paired belt…

Answer 14

you know there was once a subduction zone there

Question 15

Suture zone =

Answer 15

Very high P and T

Question 16

Has lower P and T

Answer 16

The wide zone outside the Suture Zone