The BGS Lexicon of Named Rock Units — Result Details

Tedd Formation

Computer Code: TEDD Preferred Map Code: TEDD
Status Code: Full
Age range: Famennian Age (DA) — Famennian Age (DA)
Lithological Description: Red Beds: Interbedded sandstone, very coarse-grained, pebbly with pebble bands, purple-grey, sandstones and siltstone, fine-grained, cross-bedded, ripple laminated, purple-red mudstones.
Definition of Lower Boundary: Not exposed, faulted out.
Definition of Upper Boundary: Not exposed, faulted out, but probably is gradational with base of finer grained Shanmullagh Formation.
Thickness: 450m
Geographical Limits: The Tedd Cross Roads segment of the Fintona Block.
Parent Unit: Fintona Group (FIN)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Large superficial deposit-free area between the Irvinestown to Tedd Cross Roads road (C-class), at Cloghfin and Raw Lough. 
Mitchell, W I and Owens, B, 1990. The geology of the western part of the Fintona Block, Northern Ireland: Evolution of Carboniferous basins. Geological Magazine, Vol.127 (5), 407-426. 
Mitchell, W I, 1992. The origin of Upper Palaeozoic sedimentary basins in Northern Ireland and relationships with the Canadian Maritime Provinces. "In" Parnell, J. (Editor). Basins on the Atlantic Seaboard: Petroleum Geology, Sedimentology and Basin Evolution. Geological Society Special Publication No.62, 191-202. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable