mostly made of basalt.
silicon Dioxide-silica
The main mineral type in Oceanic plates are made of basalt
mostly made of basalt.
Granite
Basalt.
Basalt NOT silicon Dioxide-silica
manganese
granic and balsiat liqued instite light
Basalt. It's a very heavy type of rock.
They are mostly made up of basalt and granite.saghasksagjysgajyawg xzhbxjygxzjygzxjym xzjxzgxzyuxz
basalts
it is basalt