Companion text: Description of the state geologic map of 1901 / Frederick J. H. Merrill. Albany : University of the State of New York / New York State Museum, 1902. Bulletin 56. 42p. 2 pls. Alternate title: Geologic map of New York: Hudson Mohawk sheet. Map is 22 sheets stored in box on top of New York map cases. Geology shown by coloring.