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Geolocation
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Author - title
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Year
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| details | Late Pottsville | Kentucky | Cross,A.T. Spore floras of the Pennsylvanian of West Virginia and Kentucky | 1947 | |
| details | Late Pottsville | Kentucky | Cross,A.T. Spore floras of the Pennsylvanian of West Virginia and Kentucky | 1947 | |
| details | Pennsylvanian | Ohio | Kosanke,R.M. A microfossil Profile of certain Pennsylvanian Coals of Ohio | 1943 | |
| details | Permian | China(Jiangxi) | Shikamura,M. Vegetable remains in the Palaeozoic Coals from the Lower Yangtze Region, China | 1940 |