How much depth does the crust have?
How much depth does the crust have? Crust. The Earth's crust ranges from 5–70 kilometres (3.1–43.5 mi) in depth and is the outermost layer. The thin parts are the oceanic crust, which underlie the ocean basins (5–10 km) and are composed of dense (mafic) iron magnesium silicate igneous rocks, like basalt. How deep is the Earth's crust below the continents? Continental crust is typically 40 km (25 miles) thick, while oceanic crust is much thinner, averaging about 6 km (4 miles) in thickness. How deep was the Earth's earliest crust? roughly 60 km The overall result of initial crystallisation formed...