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Geolocation
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Author - title
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Year
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| original | Early Namurian A | Poland | Jachowicz,A. Spore associations and stratigraphical position of Coal Seam at Kolzlowa Gora, (Upper Silesian Basin). | 1959 | |
| details | Middle Jurassic | USSR(Kazakh SSR) | Tarakanova,E.I. On the existence of three epochs of Lower Mesozoic coal accumulation in the northern part of the Turghay Depression | 1956 | |
| details | Jurassic | Ceylon | Sah,S.C.D. Spores and other micro-remains from a Carbonaceous shale (Jurassic) in Andigama, Ceylon. | 1953 |