My Favorite Fossil

The photo is my favorite fossil that I found.  It is from a phosphate mine in Eastern North Carolina.  More info about the mine and area is printed below.  The fossil in the photo shows fossilized bones embedded in sediment containing ocean debris.  The extra photo shows a jar of shells from the same mine, and a jar of rocks I picked upon Brighton Beach in England in 1989.  The Aurora Fossil Museum is a natural science museum in Aurora, North Carolina. The museum's collection is built around fossils recovered from the nearby phosphate mine owned since 1995 by Potash Corporation (PCS), but also includes fossil specimens donated from around the world as well as geology and meteorite displays. Fossils from the local mine are approximately 18-22 and 2.5-5 million years old coming from layers in the mine traced to the early Miocene and Pliocene eras in the Pungo River and Yorktown formations.
I had to enter a lottery to secure a spot in the mine on a Saturday.  They allow only a small number of  people in the mine on selected Saturdays.  It is actually a very large open hole.  The day I was there a fellow found a shark's took about half the size of his hand.  The piece in the photo is about 8" x 6."