|
USA | |
| Hurley,P.M.,Cormier,R.F.,Hower,J.,Fairbain,H.W.,and Pinson,W.H.,Jr.,(1960) Reliability of Glauconite for Age Measurement by K-Ar and Rb-Sr Methods:American Association of Petroleum Geologist Bulletin,v.44,p.1793-1808 |
| Berryhill, H. L. (1963) Geology and coal resources of Belmont County, Ohio. U.S. Geological Survey Professional Paper 380, 113 pp. |
| James Cheshire collection |
| James Cheshire collection |
| James Cheshire collection |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
| Carlson, Ernest H. (2015) Minerals of Ohio. Bulletin 69 (2nd ed.) Ohio Division of Geological Survey |
Adams County, Ohio, USA