Constructive plate margins Flashcards
1
Q
when do constructive plate margins occur
A
when tectonic plates move apart
2
Q
give examples of constructive plate margins
A
eurasian plate and north american plates
3
Q
why are earthquakes found at constructive plate margins
A
tectonic plates are moved away from each other by slab pull or ridge push
molten magma rises between and cools down to form solid rock
this forms oceanic plates
this new plate sometimes fractures and as it moves causes earthquakes - small and not violent
4
Q
what is a rift valley
A
on land constructive plate margins form steep sided valley where the land drops as plates move
5
Q
example of a rift valley
A
iceland
