The oceantic crust is (2-4mi)
The Earth's crust varies in thickness, with an average of around 18 to 37 kilometers (11 to 23 miles) under continents and about 7 kilometers (4 miles) under oceans.
The Earth's oceanic crust is very thin at the mid-ocean ridges, and gradually thickens as it moves away from the ridges. The continental crust is thickest under mountain ranges. The average depth of oceanic crust is around 5 miles. The average depth of continental crust is 22 miles.
It is called the crust
The Earth's crust is thinnest under the oceans due to oceanic crust being thinner and denser, while it is thickest through the continents where continental crust is thicker and less dense. The difference in thickness is due to the process of plate tectonics, where oceanic crust is constantly being created at mid-ocean ridges and destroyed at subduction zones.
Sounds right to me. Also remember that the earth's crust is thicker under the continents (land) than under the ocean where it becomes thinner.
The approximate radius of the Earth's center to it's surface is about 6,371 kilometers, which is about 3.959 miles.
The Earth's crust can vary in thickness, but on average it is about 5-70 kilometers (3-44 miles) thick. However, it can be much thicker under mountain ranges and thinner under the ocean floor.
The layer that is thinnest under the oceans is the crust. While it is thinnest in those underwater regions, it is the thickest in the regions where mountains are.
Earth's crust is far thicker under the continents.
The crust is typically thicker under the continental shelf compared to under the oceans. This is because the continental crust is made of lighter granite rocks which are less dense than the basaltic rocks of the oceanic crust, resulting in thicker continental crust.
Under the continents, the earth crust is on average around 50 kilometers thick, which is 50,000 meters or 5,000,000 centimeters. Under the oceans, the earth crust is on average around 7 kilometers thick, which is 7,000 meters or 700,000 centimeters.
The Earth's crust is thinnest under the oceans and thickest in the mountains.