The BGS Lexicon of Named Rock Units — Result Details

Nant-Y-Moch Formation

Computer Code: NF Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Cautleyan Stage (OU) — Rawtheyan Stage (OW)
Lithological Description: Thinly interbedded turbiditic mudstones and sandstones with units of laminated hemipelagic mudstone.
Definition of Lower Boundary: Not seen.
Definition of Upper Boundary: Conformable and sharp junction with the disturbed mudstones of the overlying Drosgol Formation.
Thickness: 280m+
Geographical Limits: none recorded or not applicable
Parent Unit: Not Available (!)
Previous Name(s): Nant-Y-Moch Beds (-419)
Nant-Y-Moch Group (-1723)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Jones, O T. 1909. The Hartfell-Valentian succession in the district around Plynlimon and Pont Erwyd (north Cardiganshire). Quarterly Journal of the Geological Society of London, Vol.65, 463-536. 
Cave, R and Hains, B A. 1986. Geology of the country between Aberystwyth and Machynlleth. Memoir of the British Geological Survey, Sheet 163 [England and Wales]. [London: HMSO.]. 148pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable