40 to 70 km thick
the core
The thickness of Earth's layers varies: the crust is between 5-70 km thick, the mantle is about 2,900 km thick, the outer core is about 2,300 km thick, and the inner core is about 1,200 km thick.
40 miles is 64.3 kms
continental: 25 to 70 km thick oceanic: 5km to 10km
continental: 25 to 70 km thick oceanic: 5km to 10km
The continental crust, (where all the land is) is generally around 30 km (20 mi) to 50 km (30 mi) thick. The oceanic crust (the bottom of the sea) is roughly 5 km (3 mi) to 10 km (6 mi) thick.
The crust is the thinnest of Earth's spheres, ranging from 5-70 km thick beneath the oceans and 20-90 km thick beneath the continents.
The continental crust is about 25 to 70 kilometers thick. The average is about 50 kilometers.
The four layers of the Earth are the crust, mantle, outer core, and inner core. The crust is the thinnest layer, ranging from about 5-70 km thick, while the mantle is about 2,900 km thick. The outer core is approximately 2,200 km thick, and the inner core is roughly 1,200 km thick.
The Earth's crust is about 40 km thick on average. It consists of the outermost solid shell of the Earth and is divided into tectonic plates that float on the semi-fluid asthenosphere below.
The Earth's layers vary in thickness. The crust is thinnest under the oceans, around 5-10 km thick, and thicker under continents, around 20-70 km thick. The mantle extends from the crust to about 2,900 km below the surface, while the outer core is about 2,300 km thick and the inner core is about 1,200 km thick.