Once home I used a 1mm screen to separate the larger stuff from what I believed was "just sand", spread it out and let it dry. It has taken me 1-2 hours a day for the last two weeks to search through this stuff. The 1-5mm material contained lots of pharyngeal fish teeth, a few small shark teeth and several tiny ray and skate teeth. Since the fish teeth were as small as 1mm I decided to have a closer look at the handfull of "sand" as well. After many hours of staring at it (I now want to buy a good table mounted magnifying glass!!), I ended up with about 100 tiny fish teeth, a few skate teeth and one tiny tiny shark tooth.
The paperclip in the pictures is standard size: 30mm long, 7mm wide, 0.8mm wire. These pictures are the best I could manage with my scanner. (note: but look at the results with my new scanner two years later)
 Yes, this is a real shark tooth. It measures about 1.1mm wide by 0.9mm tall. It's a little worn, but looks like a miniature grey shark tooth, so maybe this is from a juvenile shark? |
 Five tiny 0.5-0.9mm drum-like fish teeth. These are not the teeth from fish jaws, but from their pharyngeal plate, which is used to crush food stuff. |
 I believe this is the tooth of a skate. Compare it to Jim Bourdon's drawing on the Elasmo site. |
 Hard to see, but this is a tiny ray tooth with two root lobes. |
Finally this image shows three fossils which clearly are teeth, but
I have no idea what off, and the picture is too bad for any of
you to tell me... So I'll ask somebody at the next meeting of
the Maryland Geological Society!
Other tiny fossils included regular fish teeth, that is teeth from their jaws, but these were too small to scan. Some of these teeth are conical, some have flattened cusps and appear spade-like (like human teeth), and yet others have conical cusps, but with flattened roots that split in to two. No clue what sort of fish these all belonged to.