| Computer Code: |
PNRD |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Famennian Age (DA)
— Tournaisian Age (CT) |
| Lithological Description: |
Red and white quartz pebble conglomerates and quartz arenites with some red mudstone interbeds. |
| Definition of Lower Boundary: |
Unconformity where the basal conglomerate of the formation overlies red sandstones and marls of the Lower Devonian Brownstones Formation (Owen and Rhodes, 1969). |
| Definition of Upper Boundary: |
Apparently conformable junction with the overlying mudstones of the Tournaisian Cefn Bryn Shale Formation as seen near Fairyhill [471914] (Strahan, 1907). |
| Thickness: |
100 m. |
| Geographical Limits: |
Cefn Bryn anticline, Gower, south Wales. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
Quartz Conglomerate Formation
|
| Stratotypes: |
| Partial Type Section |
Section on west bank of Penard Pill [SS 5392 8837]. Barclay, 2011. |
| Reference(s): |
| Barclay, W J. 2011. Geology of the Swansea district: a brief explanation of the geological map. Sheet Description of the British Geological Survey. 1:50 000 Sheet 247 Swansea (England and Wales). |
| Strahan, A. 1907. The geology of the South Wales Coalfield, Part VIII. The country around Swansea. Memoir of the Geological Survey. England and Wales. |
| Owen, T R and Rhodes, F H. 1969. Geology around the university towns: Swansea, South Wales. Geologists' Association Guide, No. 17. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
