The BGS Lexicon of Named Rock Units — Result Details
Chirbury Group
| Computer Code: | CBY | Preferred Map Code: | Cby |
|---|---|---|---|
| Status Code: | Pending Upgrade | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Shales, volcaniclastic members and sandstones. | ||
| Definition of Lower Boundary: | Base of Spy Wood Sandstone Formation. | ||
| Definition of Upper Boundary: | Top not seen - unconformity. | ||
| Thickness: | >1500m, but poorly exposed. | ||
| Geographical Limits: | Not defined. | ||
| Parent Unit: | Not Entered (?) | ||
| Previous Name(s): | Chirbury Formation [Obsolete Name and Code: Use CBY]
(-4526)
Chirbury Series [Obsolete Name and Code: Use CBY] (-1416) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Chirbury area. | ||
| Reference(s): | |||
| Lapworth, C . 1887. The Ordovician rocks of Shropshire. British Association for the Advancement of Science. Report for 1886. Birmingham Meeting 662. | |||
| Whittard, W F. 1931. The geology of the Ordovician and Valentian rocks of the Shelve Country, Shropshire. Proceedings of the Geologists' Association, Vol.42, 322-344. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E165 | |||