Coal beds where formed by enormous qauntities of dead vegetation, being subject to heavy pressure. Many scientist are of the view that only a process of immense magnitude and world wide effect could account for the coal seams. (flood?)
There certainly are not "many" scientists who would agree a flood can cause the formation of coal, that's just idiotic.
Coal deposits lie in between layers of rock the formation process of which modern geology completely understands. It takes hundreds of thousands of years for sediment to form into rock and fossils, coal and oil are embedded inside these rock layers.
How did the topsoil layer across the Northern Hemisphere remain intact through a world wide deluge of sea salt water? If all the incoming water was fresh how did the oceans regain their salinity and how did marine life survive this? In reality the topsoil was laid out by freshwater glaciers.
Has anyone asked yet how the Australian marsupials got from Australia to the ark then got back home again? Modern geology explains completely the existence of the Australian marsupials but one has to accept the movement of continents across deep time and evolution.