...Nice collection, I used to hunt in the dunes at Mayport Naval Base...
The best places are where there are a lot of coquina shells on the beach. Funny thing is that the teeth come and go. The currents deposit them and you find a lot of them, then they just seem to vanish for a while. When you figure in the sheer size of the area involved there must be tons of them in circulation. I suspect that specific gravity has something to do with things, since they tend to concentrate. The coquina shell tends to stay separate from the white sand too, specific gravity at work again. South of St. Augustine Inlet there is very little coquina shell, but South of Matanzas inlet it shows up again. Near Flagler Beach there are coquina boulders exposed on the beach, same stuff the Spanish built the forts with.
The coast has moved around a lot, a whole bunch of people who built houses on the dunes are learning about that now. The next big storm is going to make a clean sweep, and it can’t be stopped.