...Used to look for sharks teeth in Florida. Hard to find on the beach, but up in the dunes, more plentiful. Lived on a Naval base and vehicles that made the ruts would turn up clean sand. It was a fun hobby, but, haven’t done any hunting for a long time. Still have a nice collection, the only thing I managed to hold on to all these years...
...South Dakota? What area???
There was an ocean over much of the Great Plains. Lots of fossils are found in the Dakotoas ranging from shark teeth, clams, and even Dinosaurs.