Here are some shells I found in Florida in the 1980s. The worm-like fossil was found on the East Coast and the miniature coral fossil was found on the Gulf Coast.
Here are a few fossils that have been "sliced" to show more details of the inside of the fossils. The round ones are Ammonites and the long one is a Trilobite.
This is another fossil Ammonite known as Perisphinctes sp. It is from the Middle Jurassic period and is 160 million years old. It was found in Morondava, Madasgascar.
This is a fossil reptile "poop" also known as Coprolite. It comes from the Cretaceous period and is anywhere from 65 to 75 million years old. It was found in Southern Madagascar.