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
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
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 adjacent coast. "In" Bassett, M G, (Ed). 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