Geological Map of the Finger Lakes from surveys conducted in the early 1900's and published by the state museum of the University of the State of New York.
Great Options include Geological Maps of:
Canandaigua Lake: Canandaigua and Naples Quadrangles
Keuka Lake: Penn Yan and Hammondsport Quadrangles
Seneca Lake: Geneva and Ovid
Cayuga Lake: Auburn and Genoa
Dimensions 24" x 57"