precambrian
crust
Crust
a fault
most volcanoes are formed from a hot spot in the earths crust.
magma
rifts
rifts
rift valleys
Pressure from the earths core
they both make up the earths crust. they are formed different.
fossil fuels
The amount of crust present on Earth always stays the same. The amount of crust descending into the mantle is balanced by the amount of crust formed at mid-ocean ridges.