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Geolocation
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Author - title
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Year
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| details | Cambrian | Ordovician | USSR(Buryat ASSR) | Butov,Y.P. Some problems of Pre-Mesozoic stratigraphy of Savan-Baikal Mountain Region. 2. New data on the age of Pre-Mesozoic deposits. | 1986 |
| details | Precambriam | China | Xing,Y. Advance on study of Precambrian micropalaeophyta in China. | 1987 | |
| details | Middle Paleozoic | USSR(Kazakh SSR) | Medvedeva,A.M. et al. Direct evidence for vertical oil migration in the eastern Precaspian. | 1993 |