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Geolocation
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Author - title
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Year
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| details | Early Cambrian | USSR(Moldavian SSR) | Timofeev,B.V. Lower Palaeozoic sediments in Moldavia | 1952 | |
| details | Nd | Nd | Naumova,S.N. Spores and pollen of coals of the USSR. | 1939 |