All the fossils have a small layer of glaciation between them. The glaciation is also a glacier. Underneath all of the fossils is volcanic ash. The volcanic ash was from a long time ago and it was compounded together and formed together. Fossil A, B, and C are all different types of fossils, yet they are still dead creatures that went through the same stages. They died, rotted, and then sunk into the ground and eroded into the rock to form a fossil.
