The BGS Lexicon of Named Rock Units — Result Details
Menevian Group
| Computer Code: | MEN | Preferred Map Code: | Men |
|---|---|---|---|
| Status Code: | Pending Upgrade | ||
| Age range: | St David's Series (ED) — St David's Series (ED) | ||
| Lithological Description: | Dark grey, laminated, commonly pyritous mudstones, with paler tuffaceous horizons locally, passing upwards into coarse turbiditic sandstones and interbedded mudstones in the upper part of the Group. | ||
| Definition of Lower Boundary: | Conformable and gradational on the sandstones of the Solva Group. | ||
| Definition of Upper Boundary: | Conformable and gradational with the interbedded sandstones and mudstones of the Lingula Flags Formation. | ||
| Thickness: | 230m | ||
| Geographical Limits: | Pembrokeshire; 1:50 000 Sheet 209 (St.David's). | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Menevian Beds [Obsolete Name and Code: Use MEN]
(-4789)
Menevian Series [Obsolete Name and Code: Use MEN] (-1062) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Cliff section at Porth-y-rhaw, Pembrokeshire. Cox et al, 1930. | ||
| Reference(s): | |||
| Rushton, A W A. 1974. The Cambrian of Wales and England, 43-121 in Holland, C H (editor), The Cambrian of the British Isles, Norden and Spitzbergen (Lower Palaeozoic rocks of the world, 2). [London: John Wiley and Son.] | |||
| Stubblefield, C J. 1959. Lexique Stratigraphique Internationale. Vol 1: Europe, 3a, England and Wales and Scotland: III Cambrian. [Paris: Centre National de la Recherche Scientifique.] 95pp. | |||
| Cox, A H, Green, J F N, Jones, O T, and Pringle, J. 1930. The St David's District: Report of the summer meeting 1930. Proceedings of the Geologists' Association, Vol.41, 412-438. | |||
| Cox, A H, Green, J F N, Jones, O T, and Pringle, J. 1930. The Geology of the St David's district, Pembrokeshire. Proceedings of the Geologists' Association, Vol.41, 241-273. | |||
| Williams, T G. 1934. The Precambrian and Lower Palaeozoic rocks of the eastern end of St David's Precambrian area Pembrokeshire. Quarterly Journal of the Geological Society, London, Vol.90, 32-75. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E209 E210 | |||