Geology Flashcards
0
Q
Panthalassa is??
A
The sea surrounding the land mass of Pangea
1
Q
Pangea is ??
A
The supercontinent
2
Q
CC is :
A
Continental crust
3
Q
OC is:
A
Oceanic crust
4
Q
How many tectonic plates are there?
A
30
5
Q
The continental crust is how many km?
A
30-70
6
Q
The oceanic crust is how many km?
A
6km
7
Q
Plates moving apart is ?
A
When tectonic plates move apart, this usually happens at the sea floor (magma rises){creates underwater volcanoes}.
8
Q
Slipping and sliding plates
A
When tectonic plates slide against eachother, causing earthquakes.
Eg. St. Andreas fault
9
Q
Earthquakes appear;
A
~pushing (subduction)- note not for mountains.
~ slipping and sliding
~ moving apart
10
Q
Earthquakes are measured by
A
Seismograph . Epicentre . Richter scale.
11
Q
What causes the movement of plates?
A
Convection
