Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GEOL 1010 > Chapter 2 > Flashcards

Chapter 2 Flashcards

1
Q

discovered outer core was liquid

A

Inge Lehmann

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

How did Inge Lehmann discover the outer core was liquid?

A

Through Seismic Waves

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

Created theory of continental Drift; Meterologist

A

Alfred Wegener

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

Super continent that indicted that the land masses drifted apart

A

Pangaea

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

How Wegener “supported” his theory on Continental Drift

A

Fossil Evidence
Matching Geologic Units
Glacial Evidence

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

How fossil evidence support continental drift?

A

Different land mammals and plants were on differing continents separated by oceans

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

How matching geologic units supported continental drift?

A

There were distinctive rock assemblages with mountain ranges and rock types fitting together (when realligned)

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

How glacial evidence supported continental drift?

A

Glaciers left marks on lands and rocks that are now oceans apart

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

Key features of the ocean floor

A

Mid ocean ridges
Deep Trenches
Sea Mountains forming Alignments

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

How was the ocean floor discover to NOT be smooth?

A

Sonar from submarines (WW2)

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

Where is heat flow greater?

A

at a mid ocean ridge

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

first plotted that the ocean floor was not flat

A

marie tharp

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

Creates brand new crust, causes continents to move apart

A

Sea floor spreading

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

How can you tell how fast sea floor spreading is taking place?

A

How thick/thin the rock is

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

in terms of SFS, thin =

A

Slow

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

in terms of SFS, thick =

A

Fast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Type of plate boundaries

A

Divergent
Convergent
Transform

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

“theory” that the continents fit together accordingly

A

jigsaw piece

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

separate area of land and shallow seas from the deep ocean basins; mark edge of continents

A

continental slopes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Confirms jigsaw theory by showing these pieces of earth align perfectly

A

Under water mountain ranges (ancient mountain belts)

21
Q

crustal fractures (also help prove jigsaw theory)

A

faults

22
Q

Part of Pangaea, assembly of the southern; Assembly of the southern continents

A

Gondwana

23
Q

What evidence indicates Gondwana?

A

Glaciation and coal formation suggests the continents were close to south pole. Glacier movement goes out ward indicating a center point towards antartica

24
Q

Why was continental drift rejected?

A

No viable mechanism to explain continental drift

25
Q

flight away from the poles; flight moved through gravity of equatorial bridge; theory

A

Polflucht

26
Q

study and measurement of earth’s Magnetic field from ancient rocks

A

Paleomagnetism

27
Q

Where does earth’s magnetism come from?

A

Outer Core

28
Q

What two parts does a compass have?

A

Horizontal component (swing) & vertical component (tilt)

29
Q

How basalt rock becomes magnetic?

A

Cools then forms iron oxide

30
Q

measures basalt rock magnetic orientation

A

magmetometer

31
Q

curve showing magnetic poles moving overtime due to basalt rocks having different magnetic orientations

A

Polar wander

32
Q

continents drifted based on center point of magnetic field and independently

A

apparent polar wander

33
Q

Earth’s magnetic field periodically reverses itself

A

Magnetic polarity reversal

34
Q

North end of compass points toward the S geographic pole

A

Reverse magnetic polarity

35
Q

who created Seas Floor Spreading?

A

Lawrence Morley, fred vines, drummond matthews

36
Q

Theory/hypothesis that the seafloor moves symmetrical away from major ridges, moving ocean and continents with it

A

Sea floor spreading

37
Q

True name given to sea floor spreading

A

“Vine-Matthews-Morley” Hypothesis

38
Q

What did Sea Floor spreading enhance>

A

Wegener’s theory (provided mechanism)

39
Q

Areas in the ocean where lava comes out of the top and assist SFS

A

Mid Ocean Ridges

40
Q

strip like patterns that indicate the magnetic patterns

A

Magnetic Anomalies

41
Q

Where is young crust located

A

Mid Ocean ridge Peak

42
Q

Where is older crust located

A

Away from Mid ocean Ridge

43
Q

How was the age of SFS tested?

A

Drilling ship (glomar challenger)

44
Q

Oceanic crust was found to lurch violently back into earth’s heated core; ocean floor is consumed

A

subduction

45
Q

Place where old crust goes for subduction; mainly located in Pacific Ocean

A

Deep ocean trenches

46
Q

generated along upper boundary of the subducting slab of Ocean

A

subduction zone

47
Q

line of volcanoes bordering the trenches that encircle the pacific

A

Pacific ring of fire

48
Q

Resulting line of volcanic islands that are curved and parallel to the adjacent ocean floor

A

Island arc

GEOL 1010 (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions