Fossil collectors in Florida have discovered an ancient sinkhole, now at the bottom of a river, which holds the remains of animals rarely seen in the state, including a type of giant armadillo, giant ...

Our study was one of the first to date Florida ... fossil sediments for important times in geologic history. These sites can help us understand changing climates, vegetation and sea levels over ...

Our study was one of the first to date Florida coastal deposits using fossil shark teeth and a technique ... Strontium is also released by deep-sea vents. Geochemist Donald DePaolo and geologist ...