The township geology of Elk and Forest counties
By: by Charles A. Ashburner, and of Cameron county by Arthur W. Sheafer. Relates especially to the geology of the coal measures of the Carboniferous age.
Contributors: Sheafer, Arthur Whitcomb, 1856-
Series: Pennsylvania Geological survey, 2d. Report of progress -- RR, pt. II; Report of progress (Geological Survey of Pennsylvania) -- R2. pt.2.
Publisher: Pub. by the Board of commissioners for the Second geological survey
Published: 1885
Place of publication: Harrisburg
Language: eng
Number of pages: 405
Subjects: Geology -- Pennsylvania.
Notes: Part I never published.

Appendix A: Drillings for coal in Sergeant township, McKean county. A correspondence by N. F. Jones, J. P. Lesley, and C. A. Ashburner. Appendix B: Notes on iron ore in Cameron county, by C. A. Ashburner.