I got up early hoping to get to the stream first to claim the fresh fossils. I went downstream in hope of something new. I instantly hit pay dirt. The sand bar was about fifty feet across and full of gravel. The perfect location for a large deposit of fossils of similar mass. It was full of large teeth, and we collected many. Here I noticed there were Miocene fossils, not the Cretaceous fossils I had expected to find. Slowly I began to tire of the spot, and despite its richness, curiosity forced me to start traveling upstream. I returned to the central park area and continued from there. I began noticing small fragments of belemnites.
Later, I found a complete Exogyra shell and more fragments as I traveled farther upstream. Eventually these Cretaceous fossils became abundant, and late in the day I came across a solid clay wall. At the junction of two streams there was a long line of shells jutting out from some very rich layers. Above that there was nothing – no life , or very little. When I looked closer, I found there were belemnites, squalicorax and more Cretaceous species.
The squid-like creatures that produced belemnites went extinct at the end of the Cretaceous when the projectile from space rocked the Earth. Here I believe I found the end of the Cretaceous and the beginning of the Paleogene. This is perhaps an instance of the KPg boundary.
All in all, I went home with some very good finds, including a wide variety of fossils. Species from many periods collect into this stream. I even found some whale bones bearing the markings of predatory creatures.