The BGS Lexicon of Named Rock Units — Result Details

Elwy Formation

Computer Code: EY Preferred Map Code: EY
Status Code: Pending Upgrade
Age range: Ludlow Epoch (SU) — Ludlow Epoch (SU)
Lithological Description: Disturbed beds, striped silty mudstones and subordinate sandstones with lateral facies changes.
Definition of Lower Boundary: Base succeeds ribbon banded mudstones of the Nantglyn Flags Formation.
Definition of Upper Boundary: Unconformably overlain by Carboniferous Limestone.
Thickness: >1750 metres.
Geographical Limits: Not defined.
Parent Unit: Not Applicable (-)
Previous Name(s): Elwy Group [Obsolete Name and Code: Use EY] (*194)
Alternative Name(s): none recorded or not applicable
none recorded or not applicable
Warren, P T, Price, D, Nutt, M J C and Smith, E G. 1984. Geology of the country around Rhyl and Denbigh. Memoir for 1:50 000 geological sheets 95 and 107 and parts of sheets 94 and 106. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E120 E094 E107 E108 E095 E137