Tectonic Exercise Flashcards
1
Q
Ocean basins vs continents
A
Ocean basins: older denser basalts
Continents: younger les dense basalts
2
Q
Upper part of mantle
A
Lithosphere
3
Q
What makes plates move?
A
Convection currents in the asthenosphere
4
Q
Theory of Isostasy
A
Lighter the continental mass the more they will float/rise
5
Q
Supercontinent
A
Pangea
6
Q
Continental drift
A
How Pangea separated
7
Q
How much are plates moving
A
2-3cm a year