Here's the breakdown:
* Continental crust is generally thicker than oceanic crust. Continental crust can reach thicknesses of 25 miles (40 kilometers) or more in some mountain ranges like the Himalayas.
* Oceanic crust is much thinner. It typically ranges from 3 to 6 miles (5 to 10 kilometers) thick.
Therefore:
* It's true that some parts of the Earth's crust (continental) can be 25 miles thick.
* It's not true that the thickest part of the crust is always 25 miles thick. The thickness varies greatly depending on the location and type of crust.
In summary, the statement "the thickest part of the crust is 25 miles thick" is not completely accurate. It's important to consider both continental and oceanic crust when discussing crustal thickness.
