- Author:
- Trythall,R.J.B.;Eccles,C.;Molyneux,S.G.;Taylor,W.E.G.
- Year:
- 1987
- Title:
- Age and controls of Ironstone deposition (Ordovician) North Wales.
- Reference:
- Trythall,R.J.B. et al. (1987) Age and controls of Ironstone deposition (Ordovician) North Wales. Geological Journal Vol. 22 P. 31- 43
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Navifusa | Navifusa sp | Wales | Late Llanvirnian | |
| Orthosphaeridium | Orthosphaeridium quadrinatum | Wales | Llandeilian | |
| Pirea | Pirea lagenaria | Wales | Llandeilian | Early Caradocian |
| Quadruilobus | Quadruilobus sp | Wales | Llandeilian | |
| Stellechinatum | Stellechinatum celestum | Wales | Early Caradocian | |
| Stellechinatum | Stellechinatum celestum | Wales | Late Llanvirnian | Early Caradocian |
| Stelliferidium | Stelliferidium sp | Wales | Late Llanvirnian | Llandeilian |
| Striatotheca | Striatotheca frequens | Wales | Late Llanvirnian | Early Caradocian |
| Striatotheca | Striatotheca principalis | Wales | Llandeilian | Early Caradocian |
| Striatotheca | Striatotheca quieta | Wales | Llandeilian | Early Caradocian |
| Veryhachium | Veryhachium horridum | Wales | Llandeilian | |
| Veryhachium | Veryhachium irroratum | Wales | Early Caradocian | |
| Veryhachium | Veryhachium lairdii | Wales | Early Caradocian | |
| Veryhachium | Veryhachium sp | Wales | Llandeilian | Early Caradocian |
| Veryhachium | Veryhachium sp.A Turn.,1985 sp. nov. | Wales | Late Llanvirnian | Llandeilian |
| Veryhachium | Veryhachium trispinosum | Wales | Llanvirnian | Early Caradocian |