The BGS Lexicon of Named Rock Units — Result Details

Aber Mawr Shale Formation

Computer Code: ABM Preferred Map Code: AbM
Status Code: Pending Upgrade
Age range: Arenig Series (OR) — Abereiddian Stage (O2)
Lithological Description: Dark grey mudstones locally with interbedded tuffs.
Definition of Lower Boundary: Not defined.
Definition of Upper Boundary: Not defined.
Thickness: c.400M
Geographical Limits: 1:50,000 Sheet 209 (St. Davids) and adjacent Sheet 210.
Parent Unit: Not Applicable (-)
Previous Name(s): Bifidus Shales (-627)
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
Hicks, H. 1875. The physical conditions under which the Cambrian and Lower Silurian rocks were probably deposited over the European area. Quarterly Journal of the Geological Society, Vol.31, p.552. 
Hughes C P, and others. 1982. Abereiddi Bay and the adjacent coast. "In" Bassett, M G. (Editor). Geological excursions in Dyfed, south-west Wales. p.51-63. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E209 E230 E244 E245 E210