Coprolites - the Leonard Collection
I don't actually do research on coprolites, but I think they are fascinating, and I collect them
A sign at Dinosaur Ridge in Denver that explains what coprolites are
A dinosaur coprolite (Sauropod?) from the Jurassic Morrison Formation in Utah
A turtle? coprolite from the Miocene of western Washington
Another coprolite (reptile) from the Miocene of western Washington
A 70 pound dinosaur (Sauropod?) coprolite from the Morrison Formation of Utah