The BGS Lexicon of Named Rock Units — Result Details
Dinas Bran Formation
| Computer Code: | DBG | Preferred Map Code: | DB |
|---|---|---|---|
| Status Code: | Pending Upgrade | ||
| Age range: | Ludlow Epoch (SU) — Ludlow Epoch (SU) | ||
| Lithological Description: | Mudstones, sandy, slightly calcareous, micaceous, thinly bedded, uncleaved. | ||
| Definition of Lower Boundary: | Overlie Vivod Group (or M. Leintwardinensis Beds) of Wills and Smith, 1922. Junction not seen. Vivod Group consists of thinly bedded flaggy mudstones. | ||
| Definition of Upper Boundary: | None - occurs in the core of the Llangollen Syncline. | ||
| Thickness: | Up to about 225 m thick. | ||
| Geographical Limits: | Between Llangollen and Pontcysyllte, Dee Valley (Vale of Llangollen) Clwyd. | ||
| Parent Unit: | Not Available (!) | ||
| Previous Name(s): | Dinas Bran Beds [Obsolete Name and Code: Use DBG]
(-198)
Dinas Bran Group (-844) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Exposures around Castell Dinas Bran. | ||
| Reference(s): | |||
| Lake, P, 1895. The Denbighshire Series of South Denbighshire. Quarterly Journal of the Geological Society, Vol.51, p.9-22. | |||
| Wills, L J and Smith, B, 1922. The Lower Palaeozoic Rocks of the Llangollen district with special reference to Tectonics. Quarterly Journal of the Geological Society, Vol.78, p.176-226. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E121 | |||