april 19th Flashcards

1
Q

what makes rocks ductile? what do ductile rocks do?

A

ductile rocks bend instead of break! they make synclines and anticlines and overall change shape. rocks are ductile under hotter temperatures, more pressure, slower strain rates/movement, and when they are deep in the earth.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what makes rocks brittle? what do brittle rocks do?

A

brittle rocks break and fracture. form faults. they are brittle under lower temperatures, less pressure, faster movement, and closer to the surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

compression?

A

when something is squished together. makes folds like anticlines.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

tension

A

when something is pulled apart. makes rocks long and skinny.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

shear

A

sliding side to side in opposite directions. makes faults- sort of.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

strike and dip??

A

Strike follows the horizontal line/plane. dip follows the tilt. Dip angle is the difference between the angle the plane moves at and a flat surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

hinge and limbs

A

hinge is the spine of the book. limbs are the pages. axial surface goes straight through.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

normal fault

A

pulling apart, result of brittle tension, hanging wall goes down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

disconformity

A

layers are eroded so there is a chronological gap between layers. something deposited after erosion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

angular unconformity

A

a set of layers got tilted, and then something got put on top.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

nonconformity

A

an invader!! something comes from below…

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

porosity

A

amount of water it can hold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

permeability

A

how easy it is for water to seep through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

aquifer

A

rock or sediment that holds and moves water easily

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

aquitard

A

slows or stops groundwater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

desposits that are reachable and can make money

A

economic reserve.

17
Q

bed load, suspended load, dissolved load

A

bed load rolls, suspended floats, dissolved doesnt exist

18
Q

foliation

A

what happens when rocks get compressed. the sheets go the same way as the pressure. like pushing on the covers of a book