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Geolocation
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Author - title
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Year
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| details | Ludlovian | Saudi Arabia | Al-Hajri,S. et al. Age and palaeoenvironment of the Sharawra Member (Silurian of North-Western Saudi Arabia) | 1998 | |
| details | Givetian | USSR(Russian Platform) | Pashkevich,N.G. Morphological classification of dispersed fossil spores. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) | 1990 |