Jump in and find your dinosaur bones to identify the cell structure and colorful replacement minerals. You will then learn about trace fossils, sometimes also called casts, and make your own replica of a dinosaur track. Petrified sponges will not only explain how petrified wood is formed through the process of mineralization, but can also be tied to dinosaur bones as well. Ancient extinct oysters are studied for clues about modern day oysters. Squished fish are an excellent example of carbonization and go a long way to helping us understand plate tectonics as well as changes in climate. Finally, you will dump a big bag of marine fossils on the table and sort through and get acquainted with sea urchins, crinoids, brachiopod, othorceras and a variety of different kinds of shark teeth. 6 activities in each kit.