Spring break had arrived and Carol's family went camping along the river seen here. During their stay, the family dug for fossils. Carol's father found pieces of elk skull and the bones of some other

Spring break had arrived and Carol's family went camping along the river seen here. During their stay, the family dug for fossils. Carol's father found pieces of elk skull and the bones of some other unidentified animals. Carol found an insect encased in amber and her little brother found two or three shark's teeth. Based on the family's fossil evidence, what can we assume about the past history of the camp site?