The BGS Lexicon of Named Rock Units — Result Details
Penarth Group
| Computer Code: | PNG | Preferred Map Code: | PnG |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Rhaetian Age (TR) — Rhaetian Age (TR) | ||
| Lithological Description: | Grey to black mudstones with subordinate limestones and sandstones; predominantly marine in origin. | ||
| Definition of Lower Boundary: | At base of Westbury Formation, usually erosional, on the Blue Anchor Formation of the Mercia Mudstone Group. | ||
| Definition of Upper Boundary: | At base of lowest formation in the Lias Group: Scunthorpe Mudstone Formation, Blue Lias Formation, Redcar Mudstone Formation etc; or 'Lower Lias'. | ||
| Thickness: | 0- >12m. | ||
| Geographical Limits: | United Kingdom, including Northern Ireland. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Lower Rhaetic [Obsolete Name and Code: Use WBY, PNG]
(-2374)
Rhaetic [Obsolete Name and Code: Use PNG, RH] (-4842) Rhaetic, Lower [Obsolete Name And Code: Use WBY Or PNG] (LRRH) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | Cliff section, north of Lavernock Point, Lavernock, c. 3 km south of Penarth. | ||
| Partial Type Section | Cliff section, north of Penarth Head, Penarth. | ||
| Partial Type Section | Cliff section, St Mary's Well Bay, Lavernock, c. 3 km south of Penarth. | ||
| Reference Section | St. Fagans Borehole (Waters and Lawrence, 1987). | ||
| Partial Type Section | Cliff section, south of Penarth Head, Penarth. | ||
| Reference(s): | |||
| Warrington, G, Audley-Charles, M G, Elliott, R E, Evans, W B, Ivimey-Cook, H C, Kent, P E, Robinson, P L, Shotton, F W and Taylor, F M. 1980. A correlation of the Triassic rocks in the British Isles. Special Report of the Geological Society of London, No.13. | |||
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) | |||
| Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. | |||
| Waters, R A and Lawrence, D J D. 1987. Geology of the South Wales Coalfield - Part III: the country around Cardiff. Memoir of the British Geological Survey, Sheet 263. (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E140 E184 E123 E263 E062 E043 E262 E199 N35 E279 E102 E055 E065 E064 E072 E080 E081 E089 E090 E091 E103 E115 E127 E128 E158 E172 E201 E142 E236 E237 E141 S043 E280 E281 E341 E342 E343 E264 E326 N28 | |||