The BGS Lexicon of Named Rock Units — Result Details

Lynton Formation

Computer Code: LNSL Preferred Map Code: Lyn
Status Code: Full
Age range: Emsian Age (DE) — Eifelian Age (DI)
Lithological Description: Finely-laminated sandstones and mudstones, slates, siltstones. Trace fossil Chondrites abundant. Thin shell beds.
Definition of Lower Boundary: Base not seen.
Definition of Upper Boundary: Overlain conformably by Hangman Sandstone Formation (Hollowbrook Member) - ie. where sandstones become dominant in the succession.
Thickness: c.300 - 400m
Geographical Limits: Sheets 277 and 278 (north Devon and west Somerset).
Parent Unit: Not Applicable (-)
Previous Name(s): Lynton Slates (-1037)
Lynton Beds (-1667)
Lynton Formation [Obsolete Code: Use LNSL] (LNB)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Sea cliffs between Woody Bay and Lynmouth Bay, near Lynton, north Devon. (No formal definition of the formation yet published). 
Reference(s):
Simpson, S. 1964. The Lynton Beds of North Devon. Proceedings of the Ussher Society, Vol.1, 121-22. 
Edmonds, E A, Whittaker, A, and Williams, B J. 1985. Geology of the country around Ilfracombe and Barnstaple. Memoir of the British Geological Survey, Sheets 277 and 293 (England and Wales). 
Evans, K M. 1983. Note on the age and fauna of the Lynton Beds (Lower Devonian) of North Devon. Geological Journal, Vol.18, 297-305. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E277