Ridge push is a process in which the unlifted ridge is thought to push the oceanic plate towards the subduction zone. Slab pull is a process where by the weight of a subducting plate help to pull the trailing lithosphere into subduction zone. Ridge lush is cause by the potential energy gradient from the high topography. Slab pull is caused by negative buoyancy of the subducting plate.
yangtze river and the yellow river
The crust and the upper mantle.
We can solve this problem, if we use the rule of three.
x=the actual distance between these towns
1 cm----------------78 Km
3 cm---------------- x
1cm *x=3 cm * 78 Km
x=(3 cm * 78 Km) / 1cm=234 Km
Solution: 234 Km
