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USA | |
| [var. Bitumen] Mahaffey, Nova, Finkelman, Robert B. (2022) The Extraordinary Variety and Complexity of Minerals in a Single Keokuk Geode from the Lower Warsaw Formation, Hamilton, Illinois, USA. Minerals, 12 (7) 914 doi:10.3390/min12070914 |
- Cave-In-Rock Mining Sub-District
| [var. Bitumen] Mineralogical Record (1997) 28:3-49 |
| [var. Bitumen] Mineralogical Record (1997) 28:3-49 |
| [var. Bitumen] Philip Bluemner photo |
| [var. Bitumen] Mineralogical Record (1997) 28:3-49 |
| [var. Bitumen] Russ Rizzo Collection via Jared Freiburg (Saga Minerals) |
| [var. Bitumen] Mineralogical Record (1997) 28:3-49 |
| [var. Bitumen] |
| [var. Bitumen] Stuart Weller, Charles Butts, Louis W. Currier, Rollin D. Salisbury (1920) The geology of Hardin County, and the adjoining part of Pope County Illinois Geological Survey Bull. 41 |
| [var. Bitumen] Econ Geol (1994) 89:288-306 |
- Stewart Mining Sub-District
| [var. Bitumen] |
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey Rocks & Min.: 61:138-142 & 64:230. |
- Blue River Group Outcrop Area
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
- Indiana University Campus
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
| [var. Bitumen] Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
| Zeitner (1956), Midwest Gem Trails |
| [var. Bitumen] (1917) Useful minerals of the United States. Bulletin Vol. 624. US Geological Survey doi:10.3133/b624 |
| [var. Bitumen] Alan Goldstein |
| [var. Bitumen] Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
| [var. Bitumen] Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
- Illinois - Kentucky Fluorspar Mining District
| [var. Bitumen] direct observation, published references on the mineralogy of the district |
| [var. Bitumen] (1917) Useful minerals of the United States. Bulletin Vol. 624. US Geological Survey doi:10.3133/b624 |
| [var. Bitumen] Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
| [var. Bitumen] |
| [var. Bitumen] Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
| [var. Bitumen] Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
| [var. Bitumen] Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
Hastie's Quarry, Spar Mountain, Cave-In-Rock Mining Sub-District, Hardin County, Illinois, USA