Since limestone is made of the remains of ancient sea creatures, it is not unusual to find fossils like this cephalopod and spiral gastropod. This type of limestone is considered fossiliferous. It is hard to believe that the part of the country that is now Tennessee could have ever been underwater, but the rocks and fossils help tell a fascinating story of our ancient past. Limestone rocks at Cedars of Lebanon date back to the Ordovician period, 500 million years ago.
an Oscar See Down My Pants Pocket? Tom Jones Can. That's Quirky!" (Well, he didn't say "quirky", but the other "q" word is not politically correct!) This is a convenient way to remember: Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian, Triassic, Jurassic, Cretaceous, Tertiary, Quaternary. The dinosaurs lived during the Triassic, Jurassic, and Cretaceous periods 230 to 65 million years ago. See this link for a good explanation of geologic time.
A Gastropod fossil found in a limestone rock at Haw Ridge in Oak Ridge.
