- 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 |
|---|---|---|---|---|
| Veryhachium | Veryhachium trispinosum | Wales | Llanvirnian | Early Caradocian |
| Goniosphaeridium | Goniosphaeridium sp | Wales | Llanvirnian | Early Caradocian |
| Adorfia | Adorfia sp | Wales | Early Caradocian | |
| Stellechinatum | Stellechinatum celestum | Wales | Early Caradocian | |
| Veryhachium | Veryhachium lairdii | Wales | Early Caradocian | |
| Veryhachium | Veryhachium irroratum | Wales | Early Caradocian | |
| Frankea | Frankea hamulata | Wales | Early Caradocian | |
| Marrocanium | Marrocanium simplex | Wales | Llandeilian | Early Caradocian |
| Pirea | Pirea lagenaria | Wales | Llandeilian | Early Caradocian |
| Veryhachium | Veryhachium sp | Wales | Llandeilian | Early Caradocian |
| Striatotheca | Striatotheca quieta | Wales | Llandeilian | Early Caradocian |
| Striatotheca | Striatotheca principalis | Wales | Llandeilian | Early Caradocian |
| Dicrodiacrodium | Dicrodiacrodium sp | Wales | Llandeilian | Early Caradocian |
| Barakella | Barakella fortunata | Wales | Llandeilian | Early Caradocian |
| Arbusculidium | Arbusculidium gratiosum | Wales | Llandeilian | |
| Quadruilobus | Quadruilobus sp | Wales | Llandeilian | |
| Arkonia | Arkonia virgata | Wales | Llandeilian |