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Flashcards in quiz 5 Deck (23)
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0

at the earths surface, potassium feldspar reacts with water to form clay; this is an example of _____

weathering

1

metamorphism, in broadest terms, involves _______

changes in mineralogy and texture in response to heat and stress

2

a body of gneiss is subject to heat and forms a melt. later the melt cools and crystallizes to form a(an) ________

igneous rock

3

the protolith subject to metamorphism _________

may belong to any of the three primary rock types

4

a buried body of shale is subjected to differential stress (directed pressure), causing clay minerals to realign and produce slate; this is an example of ________

metamorphism

5

metamorphism may be induced by _________

contact with a hot pluton
contact with hot underground water
heat and pressure associated with deep burial

6

compared to low grade metamorphic rock, high grade rocks ______

are produced at greater temperatures and pressures

7

which of the following processess cannot occur in the formation of metamorphic rock?

complete remelting of the rock followed by solidification to form new rock

8

differential stress will cause crystals to align in a preferred orientation unless the crystals are _____

equant

9

the preexisting rock that is subsequently altered to form a metamorphic rock is termed _______

protolith

10

foliated metamorphic rocks possess ________

a planar fabric consisting of mineral grains in preferred orientations or preferred patterns of association (banding)

11

a mineral within a metamorphic rock that can be used to provide a narrow constraint on the temperature and pressure of formation of the rock is termed ______

index mineral

12

a primary difference between phyllite and schist is that ______

mica crystals within schist are larger than those within phyllite

13

_________ commonly serves as a protolith in the formation of marble

limestone

14

_______ commonly serves as a protolith in the formation of quartzite

sandstone

15

the mineral assemblage with metamorphic rock is

dependent on both the mineral assemblage of the protolith and the temperature and pressure of formation

16

which list properly orders metamorphic rocks from lowest to highest grade?

slate, phyllite, schist, gneiss

17

the region of thermally metamorphosed rock surrounding a cooled pluton is called _______

aureole

18

hot water reacting with crustal rock is the basis for what type of metamorphism

hydrothermal

19

which type of metamorphism affects the greatest volumes of rock?

regional (dynamothermal) metamorphism

20

rocks resulting from thermal (contact) metamorphism will possess ______

foliation

21

which of the following is part of the process that leads to the exhumation of metamorphic rocks?

isostatic rebound of earths surface
mountain belts collapsing
erosion

22

within a single mountain range _________

it is possible to find a variety of metamorphic rocks produced in distinct facies, including high, low, and intermediate grade rocks