Basalt is the dominant rock in the ocean crust. And I assume Granite is dominant for continental crust.
Oceanic crust.
Granite
You would expect to find igneous or metamorphic rocks, depending on the depth.
Continental: granite oceanic: basalt
All three rock types are found in continental crust, with a preponderance of granitic type igneous rock.
Basalt is the dominant rock in the ocean crust. And I assume Granite is dominant for continental crust.
Oceanic crust.
Continental crust--granite. Oceanic crust--basalt.
igneous rock and sedimentary rock
Granite
You would expect to find igneous or metamorphic rocks, depending on the depth.
Oceanic crust, new oceanic crust is produced by seafloor spreading.
The type of rock that makes up most of the Earth's crust is igneous. It is the most common rock type because it has been forming billions of years ago, along with most formations on Earth.
Igneous
Continental: granite oceanic: basalt
iron