Chapter 8 test 2

Question 1

Metamorphism

Answer 1

the transition of one rock into another by temperature and/or pressure.

Question 2

contact or thermal metamorphism

Answer 2

rocks that change by a rise in temperature within the hose rock

Question 3

hydro thermal metamorphism

Answer 3

chemical alterations from hot, ion rich water

Question 4

regional metamorphism

Answer 4

produces the greatest volume of metamorphic rock.
rocks usually display zones of contact and/or hydro thermal metamorphism
occurs during mountain building.

Question 5

texture

Answer 5

refers to the size, shape, and arrangement of grains within a rock.

Question 6

foliation

Answer 6

any planar arrangement of mineral grains or structural feature within a rock
parallel alignment of flattened mineral grains and pebbles

Question 7

compression

Answer 7

flat arrangement of mineral grains.

Question 8

slaty cleavage

Answer 8

where rocks can be easily split into thin tabular sheets

Question 9

foliated textures

Answer 9

rock or slaty cleavage
schistosity
gneissic

Question 10

nonfoliated

Answer 10

marble

quartzite

Question 11

Slate

Answer 11

very fine grained
excellent rock cleavage
most often generated from low grade metamorphism of shale, mudstone, or siltstone

Question 12

schist

Answer 12

medium coarse grained
platy minerals predominate
commonly include the micas
parent rock is shale

Question 13

Gneiss

Answer 13

medium coarse grained
branded apperance
high grade metamorphism
metamorphism of granite

Question 14

Marble

Answer 14

coarse crystalline
parent rock is limestone or dolostone
used as decorative and monument stone

Question 15

quartzite

Answer 15

formed from quartz rich sandstone. quartz grains are fused together.

Question 16

contact or thermal metamorphism

Answer 16

occurs due to a rise in temperature when magma invades a host rock.
a zone of alteration called an aureole forms in the rock surrounding the magma.

Question 17

hydro thermal metamorphism

Answer 17

chemical alteration caused when hot ion rich fluids called hydro thermal solutions circulate through fissures and cracks that develop in the rock.
mid ocean ridge.

Question 18

regional metamorphism

Answer 18

produces the greatest quantity of metamorphic rock

associated with mountain building and subduction.

Question 19

burial metamorphism

Answer 19

associated with very thick sedimentary strata

required depth varies from one location to another depending on the prevailing geothermal gradient.

Question 20

metamorphism along fault zones

Answer 20

occurs at depth and high temps

pre existing minerals elongate so the rock becomes foliated

Question 21

impact metamorphism

Answer 21

occurs when high speed projectiles called meteorites strike the earths surface
products are called impactites.