Because Granite Is Less Dense Than Basalt Continents

Basalt can form in a few days to months whereas granite plutons can take millions of years to cool and harden.

Because granite is less dense than basalt continents.

Hope it helps you. Earth contains three kinds of rocks namely igneous rocks sedimentary rocks and metamorphic rocks basalt and granite are two types of igneous rocks. All rocks of igneous origin consist of magma or molten earth that finds its way up to. Basalt is denser than granite because basalt is a an oceanic type of rock so it has had more pressure from the ocean making it denser than granite because granite is a continental type of rock.

Granites may have biotite or other micas and might have a little hornblende but not very much. The key difference between basalt and granite is that basalt is mostly occurring on ocean floors while granite is in the crust of the earth in all continents. In addition the rock beneath continents is made primarily of silicon rich minerals like granite and quartz which are less dense than the magnesium rich basalt beneath the oceans. Basalt is more common in oceanic crust while granite is more common in continental crust.

Basalt is an igneous volcanic rock that forms commonly in oceanic crust and parts of. Granite is very much less dense than basalt. Granite is 70 silicon.