Answer:
If an area having 35 km thick crust is thickened by thrusting a 10 km thick slab of crust on top, how will the surface elevation change?
(1) Surface elevation will increase by ~ 1 km
(2) Surface elevation will increase by ~2 km
(3) Surface elevation will increase by ~3 km
(4) Surface elevation will decrease by ~1 km
(5) Surface elevation will decrease by ~2 km
