References
- Aldridge , R.J. , Jeppsson , L. and Dorning , K.J. 1993 . Early Silurian episodes and events . Journal of the Geological Society, London , 150 : 501 – 513 .
- Grahn , Y. 1995 . Lower Silurian Chitinozoa and biostratigraphy of subsurface Gotland . GFF , 117 : 57 – 65 .
- Hayes , M. , Kaplan , I.R. and Wedeking , K.W. 1983 . “ Precambrian Organic Geochemistry, Preservation of the Record ” . In Earth's Earliest Biosphere. Its Origin and Evolution , Edited by: Schopf , J. W. 93 – 134 . Princeton University Press .
- Le Herissé , A. 1989 . Acritarchs et cystes d'algues Prasinophycées du Silurien de Gotland, Suède . Paleontographica Italica , 76 : 57 – 298 .
- Jeppsson , L. 1990 . An oceanic model for lithological and faunal changes tested on the Silurian record . Journal of the Geological Society, London , 147 : 663 – 674 .
- Jeppsson , L. and Männik , P. 1993 . High‐resolution correlations between Gotland and Estonia near the base of Wenlock . Terra Nova , 5 : 348 – 358 .
- Jeppsson , L. , Viira , V. and Männik , P. 1994 . Silurian conodont‐based correlations between Gotland (Sweden) and Saaremaa (Estonia) . Geological Magazine , 131 : 201 – 218 .
- Jeppsson , L. , Aldridge , R.J. and Doming , K.J. 1995 . Wenlock (Silurian) oceanic episodes and events . Journal of the Geological Society, London , 152 : 487 – 498 .
- Vidal , G. 1988 . A palynological preparation method . Palynology , 12 : 215 – 220 .