| Computer Code: |
RUL |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Massive to nodular and rubbly, greyish white, 'concretionary' limestone formed as a mature soil carbonate (calcrete). |
| Definition of Lower Boundary: |
At base of massive rubbly limestone where it rests on 1.3 m of calcareous, conglomeratic sandstone. |
| Definition of Upper Boundary: |
At top of massive rubbly limestone where it is overlain by 3.66 m of fine- to coarse-grained intraformational calcrete-clast conglomerate. |
| Thickness: |
4.6 to 6.1 m. |
| Geographical Limits: |
3.2 km-length outcrop south-west of Machen, south-east Wales. |
| Parent Unit: |
Freshwater West Formation (FWW)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Ruperra Quarry, 3.2 km south-west of Machen, south-east Wales, where it is 4.6 m thick [ST 2174 8629]. Squirrell and Downing, 1969. |
| Reference(s): |
| Squirrell, H C and Downing, R A. 1969. Geology of the South Wales Coalfield, Part 1, the country around Newport (Monmouthshire). Memoir of the Geological Survey of Great Britain, Sheet 249 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
