In geological terms, a crack or fracture in the earth's surface is a fault (as in the San Andreas Fault).
it is a fault. that's like two plates moving apart from another aka an earth quake(plate tectonic) it also causes a rift valley to form and can turn into a lake and some times an ocean.
It is the volcano.
Faults
a fault
a crack in earths crust
A fault.
Fault
Crust
There is no difference. The definition of fault is precisely: a crack in the Earth's crust.
Tectonic Plate.
A *fault* is a slip or crack in the earths crust.
It is the volcano.
Faults
a fault
a crack in earths crust
A fault.
stream
a valcano