The BGS Lexicon of Named Rock Units — Result Details

Douglas Bridge Limestone Member

Computer Code: DBLM Preferred Map Code: DBLM
Status Code: Full
Age range: Courceyan Substage (CF) — Courceyan Substage (CF)
Lithological Description: Micritic limestone, pale grey, laminated and nodular. Algal mat stromatalites and sparse, marine, shelly fauna. Limestones interbedded with calcareous mudstone, siltstone and sandstone.
Definition of Lower Boundary: Base of limestones and calcareous mudstones overlying fluvial sandstones, siltstones and mudstones of the Barony Glen Formation.
Definition of Upper Boundary: Uppermost limestone overlain by fluvial sandstones, siltstones and mudstones of the Barony Glen Formation.
Thickness: 140m
Geographical Limits: Newtownstewart Basin, Sperrin Mountains, County Tyrone, Northern Ireland.
Parent Unit: Barony Glen Formation (BAGL)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Douglas Burn, County Tyrone, Northern Ireland. 
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable