Chapter 7-metamorphic Rocks

Question 1

Metamorphic changes are due to variations in

Answer 1

Temperature-pressure-tectonic stresses-reactive hydrothermal fluids

Question 2

Metamorphism example: red shale- Quartz, Clay and iron oxide

Answer 2

Gneiss - Quartz, feldspar, biotite and garnet (metamorphic rock)

Question 3

Metamorphism changes

Answer 3

Texture, creates foliation, does recrystallization (limestone to marble, sandstone to quartzite

Question 4

Slate

Answer 4

Fine-grained low grade metamorphic shale

Has foliation called slaty cleavage.

Question 5

Phyllite

Answer 5

Fine grained mica rich rock.
Formed by low to medium grade alteration slate
Clay minerals neocrystallize intoning Micah

Question 6

Migmatite

Answer 6

Partially melted gneiss
Has features or igneous and metamorphic rocks
Light colored Felsic minerals melt at lower t
Dark colored magic minerals melt at a higher t

Question 7

Quartzite

Answer 7

Almost pure Quartz in composition. Forms in alterations of Quartz sandstone

Question 8

Marble nonfoliates metamorphic rocks

Answer 8

Limestone of dolostone protolith.

Question 9

Metamorphic rock

Answer 9

Solid state alteration of a protolith (preexisting rocks) metamorphism can alter any protolith