A. On an error in identifying two distinct beds of iron ore in Report G of the Geological Survey of Bradford County -- B. Note on the occurrence of Holoptychius, about 500 feet below the recognized top of the Chemung group, in Bradford County -- C. On a mass of Catskill rocks supposed to exist on the north bank of Towanda Creek, near Franklin -- D. On two small patches of Catskill represented near Leroy, on the map in Report G, of the 2d Geological Survey of Penna. -- On the equivalent of the Schoharie grit of New York in Middle Pennsylvania.
Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
Note:
Caption title. "Read before the American Philosophical Society, October 20th, 1882." Offprint: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge. Vol. 20, no. 113 (Jan.-Apr. 1883).
Source of Acquisition:
Rare Books copy: Gift of the Earth and Mineral Sciences Library; 20078.
