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College Geology > Lesson 7 Meta Rocks > Flashcards

Lesson 7 Meta Rocks Flashcards

1
Q

Vein deposits and disseminated deposits are produced from what?

A

hydrothermal solutions

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2
Q

Deposited distributed throughout the entire rock mass?

A

disseminated deposits

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3
Q

What drives a change in contact metamorphism?

A

by a rise in temp

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4
Q

What color is marble?

A

variety

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5
Q

Metamorphism takes place where preexisting rock is subject to _________those in which it formed

A

temperatures and pressures unlike

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6
Q

FOLIATED OR NONFOLIATED:

marble

A

nonfoliated

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7
Q

What are chemically active fluids mainly?

A

water and other violates

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8
Q

FOLIATED OR NONFOLIATED:

Schists

A

foliated

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9
Q

What two places does the metamorphic agent pressure come from?

A

Burial (confining pressure)

Differential stress during mountain building

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10
Q

What is a example of high grade?

A

causes original features to be obliterated

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11
Q

What are the two types of metamorphism?

A

regional metamorphism

contact metamorphism

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12
Q

Where does contacts/thermal metamorphism occur?

A

near a mass of magma

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13
Q

FOLIATED OR NONFOLIATED:

gneiss

A

foliated

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14
Q

Name the rock-
Parent rock - quartz sandstone
Quartz grains are fused

A

quartzite

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15
Q

What is an example of low grade?

A

shale becomes slate

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16
Q

Where do metamorphic rocks come from?

A

Igneous rocks
Sedimentary rocks
Other metamorphic rocks

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17
Q

Name the rock-
Strongly foliated
“Platy”
Types based on composition (e.g., mica schist)

A

schists

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18
Q

Are quartz grains fused or unfused?

A

fused

19
Q

FOLIATED OR NONFOLIATED:

slate

A

foliated

20
Q

What are the two types of degrees of metamorphism?

A

low-grade

high-grade

21
Q

Metamorphic processes cause many changes in rocks, including what three things?

A

density
growth of larger mineral crystals
foliation

22
Q

Deposits in fractures or bedding planes?

A

Vein deposit

23
Q

Where is the degree of metamorphism shown?

A

a rocks texture and mineralogy

24
Q

Some of the most important accumulations of metallic mineral resources are produced by _______and_______processes.

A

igneous and metamorphic

25
Q

What type of metamorphism produces the greatest volume of metamorphic rock?

A

regional

26
Q

Name the rock-
Strong segregation of silicate minerals
“Banded” texture

A

gneiss

27
Q

Hot, metal-rich fluids associated with cooling magma bodies?

A

hydrothermal solutions

28
Q

What rock has a parent - limestone?

A

marble

29
Q

Reorientation of the mineral grains into a layered or banded appearance

A

foliation

30
Q

Name the rock-
Fine-grained
Splits easily

A

slate

31
Q

What does chemical active fluids promote and how?

A

Promote recrystallization by enhancing ion migration

32
Q

What is the most important agent of metamorphism?
What does it provide?
What does it result in?

A

heat
energy to rive reaction
results in recrystallization of minerals

33
Q

What rock is used as building stone?

A

marble

34
Q

What rock has a parent quartz sandstone?

A

quartzite

35
Q

What are the metamorphic agents ?

A

heat
pressure (stress)
chemically active fluids

36
Q

What type of metamorphism has change is driven by a rise in temperature?

A

contact/thermal

37
Q

What type of metamorphism occurs near a mass of magma?

A

contact/thermal

38
Q

FOLIATED OR NONFOLIATED:

quartzite

A

nonfoliated

39
Q

Marble has large interlocking _____crystals

A

calcite

40
Q

What type of metamorphism has directed pressures and high temperatures during mountain building?

A

regional

41
Q 
Name the rock-
Parent rock - limestone
Large, interlocking calcite crystals
Used as a building stone
Variety of colors
A

marble

42
Q

What are the types of metamorphic texture?

A

foliated rocks

non-foliated rocks

43
Q

What are metamorphic rocks described as?

A

“changed form” rocks

44
Q

What two things are made from hydro thermal solutions?

A

Vein deposits

Disseminated deposits

College Geology (14 decks)

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