| Computer Code: |
TOOM |
Preferred Map Code: |
TOOM |
| Status Code: |
Full |
| Age range: |
Early Triassic Epoch (TE)
— Early Triassic Epoch (TE) |
| Lithological Description: |
Sandstone, orange-red, up to medium-grained with some coarse sand grains, sub-angular to well rounded, weakly cemented; thin siltstone and mudstone layers, brick-red. |
| Definition of Lower Boundary: |
Gradational with red mudstones and sandstones at the top of the underlying Drumcullen Formation. |
| Definition of Upper Boundary: |
Sharp contact with red mudstones and siltstones at the base of the succeeding Mercia Mudstone Group. |
| Thickness: |
191.4 - 199.9m [628-656 ft] |
| Geographical Limits: |
Sub-surface on the northwest shore of Lough Neagh. |
| Parent Unit: |
Sherwood Sandstone Group (SSG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Annaghmore-1 Borehole. GSNI Borehole Database Number 94SE/1 [1632-2260ft--497.4-688.8m] 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
