Question: In the first model, what happens as the layer of coarse material develops at the surface? Need Assignment Help? View Available Hint(s)for Part C It blocks the fine-grained sediment below from the wind, which prevents the possibility of further deflation. It is polished and rounded from wind abrasion. The coarse grains are transported downslope by water and deflation wears down the ground surface. The large clasts trap increasing amounts of fine sediments over time, causing the land surface to rise. The concentration of large particles decreases through time.