| Computer Code: |
GKTU |
Preferred Map Code: |
GKTU |
| Status Code: |
Full |
| Age range: |
Brigantian Substage (CX)
— Brigantian Substage (CX) |
| Lithological Description: |
Interbedded purplish brown, grey, tuffaceous mudstone; pale grey, tuffaceous sandstone; green, vitric and lithic, coarse tuffs. |
| Definition of Lower Boundary: |
Lowest tuff layer resting on highest basalt lava flow of Carey River Basalt Formation. |
| Definition of Upper Boundary: |
Lowest coal seam (H) of the Murlough Bay Coals overlying mudstone. |
| Thickness: |
61 m. |
| Geographical Limits: |
none recorded or not applicable
|
| Parent Unit: |
Ballycastle Sandstone Group (BCSS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
North-east coast of County Antrim, south and east of Ballycastle and especially in Cross Borehole. |
| Reference(s): |
| Wilson, H E and Robbie, J A. 1966. Geology of the Country around Ballycastle. Memoir of the Geological Survey. [Belfast: HMSO.] |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
