The BGS Lexicon of Named Rock Units — Result Details
Topped Mountain Sandstone Formation
| Computer Code: | TPMS | Preferred Map Code: | TPMS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Asbian Substage (CR) — Brigantian Substage (CX) | ||
| Lithological Description: | Sandstone, cross-laminated, grey, pink-purple stained, fine- to coarse-grained, subarkose with interbedded grey-red and green siltstones and mudstones; carbonate nodules. | ||
| Definition of Lower Boundary: | Not seen; everywhere faulted. | ||
| Definition of Upper Boundary: | First appearance of conglomerates and pebbly sandstones marks change to Ballyreagh Conglomerate Formation. | ||
| Thickness: | At least 1000m | ||
| Geographical Limits: | Southern sector of the Fintona Block, Northern Ireland. | ||
| Parent Unit: | Kilskeery Group (KILS) | ||
| Previous Name(s): | Dingle Beds [Obsolete Name and Code: Use FIN, TPMS, BRC, BLM]
(-1993)
Shanmaghry Sandstone Formation [Obsolete Name and Code: Use TPMS] (-1239) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Summit of Topped Mountain and the spur trending northnortheast from the summit cairn, County Fermanagh, Northern Ireland. | ||
| Reference(s): | |||
| Wilkinson, S B, 1882. The geology of the country around Eniskillen, Fivemiletown, Trillick, Lisbellew and Maguiresbridge. Explanatory Memoir to accompany Sheet 45 of the maps of the Geological Survey of Northern Ireland. Dublin and London. | |||
| 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 N45 | |||