The BGS Lexicon of Named Rock Units — Result Details

Cwm Degwel Mudstone Member

Computer Code: CDMD Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Interbedded dark grey to black turbiditic and laminated hemipagic mudstones.
Definition of Lower Boundary: Conformable with the sandstones of the main part of the Dinas Island Formation.
Definition of Upper Boundary: Overlain by burrow-mottled mudstones of the Nantmel Formation, the boundary possibly represents a non-sequence.
Thickness: To 60m
Geographical Limits: none recorded or not applicable
Parent Unit: Dinas Island Formation (DIIS)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
Davies, J R, Waters, R A, Wilby P R, Williams, M and Wilson, D. 2003. Geology of the Cardigan and Dinas Island district - a brief explanation of the geological map. Sheet explanation of the British Geological Survey. 1: 50 000 Sheet 193. [Keyworth, Nottingham: British Geological Survey.] 26pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: