300 Foxes and a Donkey's Jawbone
If a sedimentary rock is full of the remains of Graptiloids does it means that the Graptiloids were in their maximum abundance? No, it means that the place where the Graptiloids lived got buried in sediment.
Abundance of marine invertebrates; first trilobites and foraminifers. That's what lives on the floor of the ocean. That's why it's at the bottom of the stratigraphic column.
Warm, epicontinental seas supporting an abundance of blue-green, green, and red algae. Why would examination of Cambrian sediment lead us to conclude that the Cambrian had warm epicontinental seas?
The Bible says that there was a world-wide flood, but failed science (SciPop) insists that there's no evidence of it. A world-wide flood would leave evidence, so where is it? It's the world-wide distribution of sedimentary rock.