Final stop of the New York State Geological Association field trip B3: North Evans / Genundawa. This locality is an overpass on Route 20 near Bethany Center. Professor Gordon Baird, SUNY Fredonia explains the stratigraphy. Dr. Bill Kirchgasser, SUNY Potsdam is on the left and Dr. Kym Pocius, Rochester Academy of Science Fossil Section, looks on from the right. The top section is the Genundawa Limestone and the black shale beneath is the Penn Yan. One layer within the Genundawa contains numerous steinkerns of the goniates ammonoid, Koenenites. We collected some of these from blocks off the Route 20 northside berm a few hundred yards to the east of here.