To be thorough, most of my trips to the Rappahannock beach have yielded fossil shrimp coprolite burrows, but few teeth. Still in a half dozen trips I have accumulated a few. I also picked up a funny-looking rock which has a fine pattern of something (some type of coral?) growing on it (or fossilized). Forgot my tape measure, but the teeth are small and the rock shown isabout an inch (2.5 cm) across.