The BGS Lexicon of Named Rock Units — Result Details

Tintern Sandstone Formation

Computer Code: TSG Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Famennian Age (DA) — Tournaisian Stage (CT)
Lithological Description: Buff-yellow sandstone with local lenticles of pebbles and subordinate marl partings.
Definition of Lower Boundary: Drawn at base of Tintern Sandstone Group where it rests conformably on quartz conglomerate of the Quartz Conglomerate Group. (Correlative of Tintern Sandstone Group and Quartz Conglomerate Group- Portishead Beds).
Definition of Upper Boundary: Drawn at conformable upward passage from buff-yellow sandstone of Tintern Sandstone Group to limestone of Lower Limestone Shale Group.
Thickness: Up to 75m approx.
Geographical Limits: Forest of Dean, Gloucestershire.
Parent Unit: Upper Old Red Sandstone Group (ORSU)
Previous Name(s): Tintern Sandstone (-4938)
Tintern Sandstone Group (-1240)
Alternative Name(s): none recorded or not applicable
Type Area  Monmouth area - Forest of Dean. 
Trotter, F M, 1942. Geology of the Forest of Dean and Iron-ore Field. Memoir of the Geological Survey of Great Britain. 
Welch, F B A, "In" Eastwood, T, 1938. Summary of Progress. Geological Survey of Great Britain for 1937, p.29-30. 
Welch, F B A and Trotter, F M. 1961. Geology of the country around Monmouth and Chepstow. Explanation of one-inch geological sheets 233 and 250. Memoir of the Geological Survey of Great Britain. 
Kellaway, G A and Welch, F B A, 1955. The Upper Old Red Sandstone and Lower Carboniferous rocks of the Bristol and the Mendips compared with those of Chepstow and the Forest of Dean. Bulletin of the Geological Survey of Great Britain, No.9, p.1-21. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E234 E233 E250 E251 E265