The BGS Lexicon of Named Rock Units — Result Details

Dolfawr Mudstones Formation

Computer Code: DOL Preferred Map Code: Dol
Status Code: Pending Upgrade
Age range: Llandovery Epoch (SL) — Wenlock Epoch (SW)
Lithological Description: Thinly interbedded shelly pale green mudstones and laminated hemipelagites.
Definition of Lower Boundary: Base of lowest laminated hemipelagite overlying the Cerig Formation.
Definition of Upper Boundary: Base of Builth Mudstones.
Thickness: Up to 55 metres.
Geographical Limits: Central Wales.
Parent Unit: Not Applicable (-)
Previous Name(s): Pale Shales (-3913)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  River Ithon, 500 metres east of Dolfawr Farm. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E196 E179