| details |
Rhaetian |
|
USSR(Siberia) |
Bogdashova,L.I. et al. Correlation of size of mega-microspores, Ginkgo and Conifer pollen as dependent on conditions of accumulation of fluvial and swamp facies in the Lias. (In: Material on the Biostratigraphy and Paleogeography of Eastern Siberia) |
1975 |
| details |
Hettangian |
Toarcian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Early Jurassic |
|
USSR(Siberia) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |