Cretaceous layer

The cretaceous layer  is evidence for a shallow sea covering the earth. (Evidence for the flood). Different areas off the layers have different thickness brrought about by different size currents. It is estimated that only about 30% of swimming marine organisms survived. Conntinental uplift would have resulted in the drainage of water and the recycling of sedimentary deposits, as well as the depositing of the chalk beds, plant, animal and human remains (hence fossil fuels) and would also explain on the upper levels the fossil graveyards in the tertiary deposits.
And it came to pass after seven days, that the waters of the flood were upon the earth. Genesis 7:10