| Computer Code: |
CALN |
Preferred Map Code: |
CARL |
| Status Code: |
Full |
| Age range: |
Cisuralian Epoch (PLC)
— Cisuralian Epoch (PLC) |
| Lithological Description: |
Sandstone, pale orange-pink, medium-to coarse-grained, sub-to well rounded, weakly cemented. |
| Definition of Lower Boundary: |
Sharpe change from underlying pink sandstones [with mainly angular grains] of the Ballina Bridge Formation. |
| Definition of Upper Boundary: |
Sharp contact with white carbonate at the base of the succeeding Magnesian Limestone Formation [Belfast Harbour Evaporite Formation]. |
| Thickness: |
19.8 - 28m [65 - 92 ft] |
| Geographical Limits: |
Sub-surface on northwest shore of Lough Neagh. |
| Parent Unit: |
Enler Group (ENLE)
|
| Previous Name(s): |
Lower Permian Sandstone
(-748)
|
| Alternative Name(s): |
Ballytober Sandstone Formation
|
| Stratotypes: |
| Reference Section |
Annaghmore-1 Borehole. GSNI Borehole Database Number 94SE/1 [3320-3385ft --1011.9-1031.7m] Based on cutting samples at 10ft intervals of which a split sample is stored with the Geological Survey of Northern Ireland. |
| Reference(s): |
| Naylor, D, Philcox, M E and Clayton, G. 2003. Annaghmore-1 and Ballynamullan-1 wells, Larne-Lough Neagh Basin, Northern Ireland. Irish Journal of Earth Sciences, Vol.21, 47-69. |
| Geological Survey of Northern Ireland. 2001. Ballymena, Northern Ireland Sheet 20. Solid and Drift Geology. 1:50,000. (Keyworth, Nottingham: British Geological Survey.) |
| Penn, I E, Holliday, D W, Kirkby, G A, Kubala, M, Sobey, R A, Mitchell, W I, Harrison, R K and Beckinsale, R D. 1983. The Larne No 2 Borehole: discovery of a new Permian volcanic centre. Scottish Journal of Geology, Vol.19, 333-46. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
