Continental Boundaries & Drift Flashcards

(58 cards)

1
Q

name the major plates in alphabetical order

A

African plate, antarctic plate, Eurasian plate, Indo-Australian plate, North American plate, Pacific plate, South American plate

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

How many major plates are there

A

seven

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

Hotter less dense material rises while cooler denser material sinks moves by cm/yr.

A

mantle convection

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

What causes plates to move?

A

moving mantle material aka basal friction

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

How slow does the slowest plate (Scotia) move?

A

0 cm/yr

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

How fast does the fastest plate (Indian) move

A

100 cm/yr

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

Secondary mechanism, gravity pushes oceanic plate away, higher elevation, Mid-ocean____

A

ridge push

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

The oceanic plate is pulled into the mantle and is destroyed/ converted into mantle material due to subduction. Also a secondary mechanism.

A

slab pull

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

What do characteristics of plates depend on?

A

location/way they move/ Oceanic or Continental

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

2 plats grind past each other.

A

transform boundary

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

plates are not created nor destroyed

A

transform boundary

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

powerful earthquakes are created

A

transform boundary

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

potential energy that builds then slips

A

transform boundary

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

no volcanoes

A

transform boundary

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

San Andreas Fault

A

transform boundary

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

frequent weak earthquakes that cause cities to move closer together

A

transform boundary

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

two plates move away from each other

A

divergent boundaries

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

small volcanoes & shallow/weak earthquakes

A

divergent boundaries

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

two types of divergent boundaries

A

1)oceanic-oceanic
2)continental-continental

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

Seafloor spreading and new floor built

A

oceanic- oceanic divergent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

new oceanic basin

A

oceanic-oceanic divergent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How new crust is formed

A

oceanic-oceanic divergent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

mid-ocean ridge that forms at the spreading center

A

oceanic-oceanic divergent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

newest lithosphere

A

oceanic-oceanic divergent

25
Mid-Atlantic ridge:caused by Eurasia and North American plate in the North along with south america and africa in the south.
oceanic-oceanic divergent
26
Rift valley forms as ocean splits central rift splits and ocean water fills it. new ocean basin forms.
continental-continental divergent
27
most action,plates move and slide towards each other
convergent boundaries
28
three types:
1) Oceanic-Oceanic convergent boundaries 2)Continental-Oceanic convergent boundaries 3) Continental-Continental boundaries
29
subduction zone, trench, into asthenosphere and converted into mantle material, Strong Volcanoes&Earthquakes
Continental/Oceanic convergent
30
Andes mountain range
continental/oceanic convergent
31
older cooler and denser crust slips below the other, causes volcano formation and island arcs, tsunamis,
oceanic/oceanic convergent
32
Japanese & Aleutian Islands
oceanic/oceanic convergent
33
no subduction, no compression, rise up, plates are compressed, folded & uplifted, causing formation of huge mountains, Earthquakes are weaker than transform boundaries but greater than divergent boundaries so medium no volcanoes
continental/continental convergent
34
Himalayas
Continental/Continental Convergent
35
continents are part of the plate and they move slowly cm/yr. mantle convection and basal friction
plate tectonics
36
supercontinent, most of all land on Earth
Pangea
37
335 mya
Pangea
38
Pangea started to break up into smaller continents
175 mya
39
Mostly was in southern hemisphere and surrounded by global ocean.
Pangea
40
pan means
entire
41
gaia means
earth
42
due to divergent boundaries forming rift valleys pangea splits in two in the first split
175 mya
43
two parts of Pangea
1) Laurasia 2) Gondwana
44
North America, Eurasia, Greenland
Laurasia
45
South america, africa, India, arabia, antarctica, australia
gondwana
46
Gondwana breaks into five major parts
150 mya
47
Laurasia breaks into North America+greenland= laurentia & Eurasia
60 mya
48
India runs into Asia and form the Himalayas in
35 mya
49
Isthmus of Panama connects North and South America which seperates the Atlantic and pacific ocean
2.8 mya
50
Supercontinents are
cyclical
51
Nuna
1.8 bya
52
Rodinia
1.1 bya
53
panotia
600 mya
54
Pangea Ultima
250 mya into the future . The supercontinent of the future
55
230 mya fossils found in Africa, South America, and Antarctica
Cygnognathus
56
250 mya fossils in India, Africa, and Antarctica
Lystrosaurus
57
250 mya fossils found in Africa & South America
Mesosaurus
58
250 mya fossils in africa, India, New Zealand & Australia, and Antarctica
Glossopteris