The BGS Lexicon of Named Rock Units — Result Details
Pebidian Supergroup
| Computer Code: | PN | Preferred Map Code: | PV |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
| Lithological Description: | Trachytic and andesitic tuffs, with locally conglomeratic tuffaceous sediments. NOTE: The definition follows the usage on British Geological Survey 1:25 000 Special Sheet SM72 (St Davids), 1973, which in turn derives from Green, JFN. 1908.The computer code PV already exists for 'Pebidian Volcanic Series (undifferentiated)'. | ||
| Definition of Lower Boundary: | Base not seen. | ||
| Definition of Upper Boundary: | Stratigraphical top uncertain/undefined (see Ogofgolchfa Group); ?overlain unconformably by Lower Palaeozoic rocks. | ||
| Thickness: | At least 2000 m. | ||
| Geographical Limits: | St. Davids Sheet 209. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Pebidian Volcanic Complex [Obsolete Name and Code: Use PN, PVL]
(-2978)
Pebidian Volcanic "Series", Undivided [Obsolete Name And Code: Use PN] (PV) Lower Pebidian (Undifferentiated) [Obsolete Name and Code: Use PN] (-460) Pebidian Volcanic Complex (Undifferentiated) [Obsolete Name and Code: Use PN] (-461) Pebidian Supergroup [Obsolete Code: Use PN] (PVL) Pebidian Volcanic Series [Obsolete Name and Code: Use PN] (-1123) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| none recorded or not applicable | |||
| Reference(s): | |||
| Pharaoh T C and Gibbons W. 1994. Precambrian rocks in England and Wales south of the Menai Strait Fault System. 85-97 in Gibbons W and Harris A L (editors), A revised correlation of Precambrian rocks in the British Isles. Geological Society of London Special Report No.22. | |||
| Green, J F N. 1908. The geological structure of the Saint David's area (Pembrokeshire). Quarterly Journal of the Geological Society of London, Vol.64, 363-383. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E210 E209 | |||