Computer Code: |
GOCF |
Preferred Map Code: |
GOCF |
Status Code: |
Full |
Age range: |
Mid Devonian Epoch (DM)
— Late Devonian Epoch (DU) |
Lithological Description: |
Pebble to boulder conglomerates with sandstone beds; 2 horizons of contemporaneous 'andesitic' lavas. |
Definition of Lower Boundary: |
Very confused relationship. May be unconformable on underlying Shammaghery Sandstone Formation, may be normal but abrupt, commonly faulted or not exposed. |
Definition of Upper Boundary: |
Supposedly interfingers laterally with and merges gradationally upwards into Raveagh Sandstone Formation. |
Thickness: |
From about 2440 m - 2720 m thick. |
Geographical Limits: |
none recorded or not applicable
|
Parent Unit: |
Fintona Group (FIN)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Central Co. Tyrone between Pomeroy and Fintona, between Tempo-Sixmilecross Fault and the Ballygawley Fault. |
Reference Section |
Bernisk Glen, 3.5 km ESE of Sixmilecross upstream of C-class road bridge. |
Reference(s): |
Geological Survey of Northern Ireland 1979. Pomeroy, sheet 34, solid, 1:50 000. [Southampton, Ordnance Survey for Institute of Geological Sciences.] |
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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
N33
|