We visited two late Cretaceous sites in Montgomery County, Alabama, where we collected primarily shark teeth and echinoids. A surprise awaited - one site we have visited for years used to have a huge sand pile shaped like a mushroom that was filled with shark teeth. The mushroom is no more, and all that is left is a sandpile. Last we heard, the sand was being used in the zoo. You don't want to know any more than that!
(Photos courtesy Brian Ward.)
And here is the sandpile. Several small shark teeth were found by sifting.
horned coral, echinoid
Echinoids and horned coral at the creek site.
echinoids
Echinoids as found in matrix.