Where new crust is generated as the plates pull away from each other
Constructive/Divergent
1 of 22
Where crust is destroyed as one plate moves under another
Destructive/Convergent
2 of 22
Where crust is neither produced nor destroyed as the plates slide horizontally past each other
Conservative/Transform
3 of 22
Have a total length of 60,000km
Oceanic Ridges
4 of 22
In some parts they rise to over 3,000m above the ocean floor
Oceanic Ridges
5 of 22
Largest example of an Oceanic Ridge
Iceland, on the MId-Atlantic Ridge
6 of 22
An Oceanic Ridge forms along which type of margin
Constructive
7 of 22
Where do Rift Valleys occur
At Constructive margins in Continential areas
8 of 22
What causes Rift Valleys
Heating and doming up of the crust leads to fracturing and rifting
9 of 22
Largest example of a Rift Valley
Great East African Rift Valley - 4,000km long and 50km wide
10 of 22
Which landforms occur at Subduction zones
Volcanoes
11 of 22
The 1st type of destructive/convergent margins
Ocean plate colliding with a less dense continental plate
12 of 22
The 2nd type of destructive/convergent margins
Ocean plate colliding with another ocean plate
13 of 22
The 3rd type of destructive/convergent margins
Continental plate colliding with another continental plate
14 of 22
What is formed when two continental plates collide
Fold Mountains
15 of 22
The San Andreas Fault is an exaple of which margin
Conservative
16 of 22
Two examples of oceanic-oceanic convergence
Peru-Chile Trench and an Island Arc
17 of 22
Originates deep within the asthenosphere as molten rock which rises and melts through the lithosperic plate forming a large volcanic mass at a hot spot
Mantle Plumes
18 of 22
Consists of the crust and the rigid upper section of the mantle
Lithosphere
19 of 22
Semi-molten mass below the lithosphere on which the plates float
Asthenosphere
20 of 22
What are convection currents
Zones of hotter, more liquid magma with circlatory motion in the astheonsphere that causes the plate to move
21 of 22
Theory by Alfred Wegener in 1912 that all the continents used to be joined together 250m years ago
Supercontinent - Pangea
22 of 22
Other cards in this set
Card 2
Front
Where crust is destroyed as one plate moves under another
Back
Destructive/Convergent
Card 3
Front
Where crust is neither produced nor destroyed as the plates slide horizontally past each other
Back
Card 4
Front
Have a total length of 60,000km
Back
Card 5
Front
In some parts they rise to over 3,000m above the ocean floor
Comments
No comments have yet been made