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From
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To
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Geolocation
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Author - title
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Year
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| details | Tournaisian | USSR(Urals) | Burilova,R.V. Stratigraphy of the coal-bearing formations on the Western Slope of the Middle Urals. | 1971 | |
| details | Namurian A | Spitsbergen | Birkenmajer,K. Devonian, Carboniferous and Permian Formation of Hornsund, Vestspitsbergen. | 1964 |