Which index fossils may be found in the surface bedrock near Ithaca New York?

In the surface bedrock near Ithaca, New York, you can find index fossils such as trilobites, brachiopods, and corals, particularly from the Devonian period. Fossils like Eurypterids (sea scorpions) and various ammonites may also be present. These fossils are useful for dating and correlating the age of the rock layers in the region.