Talk:Basement rock

''The crust there is said to be 70 miles thick

I believe that it should be 70 km. Siim 16:06, 10 December 2006 (UTC)

''often in the form of granite

It can be granite but is more oftenly metamorphic rock. It's widespread misunderstanding that continental crust is mainly composed of granite. Siim 16:06, 10 December 2006 (UTC)