Steps. 1  1. Perform major pruning during the dormant season. The ideal time to prune a crabapple tree is late winter or in the cold days of early spring, before leaves appear. 2  2. Remove suckers. Suckers are additional branches that begin growing underground and sprout near the base of the tree. 3  3. Remove water sprouts.
The upper crust is 12.5 km thick in crust with an average total thickness of 40 km (ref. 3). If the upper crust is the product of 14% melting, the corresponding residue would be 77 km thick, resulting in a total crustal thickness of 100 km, including the middle crust.
The average is 9 miles.   The average continental crust thickness is 22 miles thick. The maximum crust thickness is 56 miles underneath the Himalayas, and is 16 miles thick â¦ at its thinnest in various places.  The average oceanic crust is about 4 miles thick.   For the entire Earth then, the average crust thickness is 9 miles.he average is 9 miles.   The average continental crust thickness is 22 miles thick. The maximum crust thickness is 56 miles underneath the Himalayas, and is 16 miles thick â¦ at its thinnest in various places.