New York State Geological Association 2006 field trip B3, stop 1. From left to right, Dr. Bill Kirchgasser, SUNY Potsdam; Dan Krisher, Ward's Natural Science; Dr. Jeff Over, SUNY Geneseo; Dr. Gordon Baird, SUNY Fredonia; and Dr. Andrew Bush, University of Connecticut. Professor Baird explains that the North Evans Limestone is comprised of two million years of conodont zones, numerous fish spines, teeth, and plates. It extends eastward nominally to Taunton Gully in the Genesee Valley.