What is the crust depth range km?

The Earth's crust varies in depth, typically ranging from about 5 kilometers (3 miles) beneath the oceans (oceanic crust) to approximately 30-50 kilometers (18-31 miles) beneath continental regions (continental crust). In some mountainous areas, the crust can be even thicker, exceeding 70 kilometers (43 miles). This variation is due to differences in geological processes and the composition of the crust in different regions.