The BGS Lexicon of Named Rock Units — Result Details
Llanbadrig Formation
Computer Code: | LLBG | Preferred Map Code: | notEntered |
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Status Code: | Full | ||
Age range: | Sandbian Age (OSA) — Katian Age (OKA) | ||
Lithological Description: | Dark grey hemipelagic and pale grey mudstone with sandstone locally at the base; locally oolitic ironstone. | ||
Definition of Lower Boundary: | Unconformable upon Ordovician rocks, eg. Camaes Group (CMS) and older rocks. | ||
Definition of Upper Boundary: | Stratigraphic boundary unknown: thrust, faulted or eroded. | ||
Thickness: | none recorded or not applicable | ||
Geographical Limits: | Anglesey. | ||
Parent Unit: | Not Applicable (-) | ||
Previous Name(s): | Crewyn Formation
(CREW)
Llanbodo Formation (LLBO) Porth Pridd Formation (PPRID) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
none recorded or not applicable | |||
Reference(s): | |||
Bates, D E B. 1974. The structure of the Lower Palaeozoic rocks of Anglesey, with special reference to faulting. Geological Journal, 9(1), 39-60. | |||
Bates, D E B. 1972. The stratigraphy of the Ordovician rocks of Anglesey. Geological Journal, 8(1), 29-58. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |