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Flashcards in Geology Deck (12):
0

Pangea is ??

The supercontinent

1

Panthalassa is??

The sea surrounding the land mass of Pangea

2

CC is :

Continental crust

3

OC is:

Oceanic crust

4

How many tectonic plates are there?

30

5

The continental crust is how many km?

30-70

6

The oceanic crust is how many km?

6km

7

Plates moving apart is ?

When tectonic plates move apart, this usually happens at the sea floor (magma rises){creates underwater volcanoes}.

8

Slipping and sliding plates

When tectonic plates slide against eachother, causing earthquakes.
Eg. St. Andreas fault

9

Earthquakes appear;

~pushing (subduction)- note not for mountains.

~ slipping and sliding

~ moving apart

10

Earthquakes are measured by

Seismograph . Epicentre . Richter scale.

11

What causes the movement of plates?

Convection