quiz 6

Question 1

The region of thermally metamorphosed rock surrounding a cooled pluton is called a(n)

Answer 1

aureole

Question 2

what properly illustrates the principle of isostasy?

Answer 2

Mountains stand high because they are gravitationally balanced by their deep
crustal roots.

Question 3

Why do earthquakes occur only above the brittle-ductile transition depth?

Answer 3

Below the transition, the rocks are too hot and deform plastically.

Question 4

Normal faults are generally the result of…
stress.

Answer 4

tensional

Question 5

An episode of mountain building is termed a(n)

Answer 5

orogeny

Question 6

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

Answer 6

slate, phyllite, schist, and gneiss

Question 7

Shields contain vast areas of exposed metamorphic rocks; this is due to the…. process.

Answer 7

exhumation

Question 8

Preexisting rock that is subsequently altered to form a metamorphic rock is termed a

Answer 8

protholite

Question 9

…. commonly serves as a protolith in the formation of slate.

Answer 9

shale

Question 10

Right-lateral and left-lateral are both terms used in description of … faults

Answer 10

strike-slip

Question 11

Metamorphism occurs at temperatures between … and ..

Answer 11

diagenesis; melting

Question 12

Clay minerals within a buried body of slate are recrystallized at high temperatures and pressures to form mica, producing a rock called phyllite. This is an example of

Answer 12

metamorphism

Question 13

is the process whereby rocks from depth are exposed at the surface during mountain building.

Answer 13

uplift

Question 14

The outer portion of a craton, where deformed rocks are covered by sediments, is termed the

Answer 14

cratonic platform

Question 15

The net chemical change in metamorphic rock induced by a reaction with hot groundwater is termed

Answer 15

metasomatism

Question 16

Under which condition would a body of rock be most likely to exhibit brittle behavior?

Answer 16

low temperature

Question 17

Normal, reverse, and thrust are all examples of
… faults.

Answer 17

dip-slip

Question 18

Normal faulting is most often associated with mountain building along .. boundaries, while reverse faulting is generally observed at..
boundaries.

Answer 18

divergent ; convergent

Question 19

A fold shaped like an elongated arch is a(n)

Answer 19

anticline

Question 20

…. commonly serves as a protolith in the formation of marble.

Answer 20

limestone

Question 21

which is the highest grade metamorphic rock

Answer 21

gneiss

Question 22

The formation of the Basin and Range Province is associated with which of the following processes?

Answer 22

continental rifting

Question 23

In the formation of gneiss from granite, distinctive compositional bands form because of

Answer 23

crystals dissolving, with atoms and ions migrating and reorganizing as new crystals

Question 24

Two common metamorphic rocks that typically lack foliation are …
and….

Answer 24

quartzite; marble

Question 25

The rapid, deep burial of sediments in an accretionary prism leads to the formation of a metamorphic rock termed

Answer 25

blueschist

Question 26

Mountain ranges formed along subduction zones are formed, in part, by … in the crust.

Answer 26

compression and uplift

Question 27

The blueschist facies is a metamorphie realm of

Answer 27

high pressure but relatively low temperature

Question 28

The rock hornfel is often formed due to … metamorphism

Answer 28

thermal / contact