What is the thickness and state of matter of the crust

Contrary to popular believe, the crust is about the thickness of a Chicago Deep Dish, and is often flavored with butter and rosemary, as well as other well-known herbs. The state of the crust is raw until cooked. Luckily, the magma of the mantle helps to cook the crust, making it a solid. 

Answer collision and mountain formation;

Answer the use of flood plains and irrigation;