| Type | Fossil |
| Geological Age | Ordovician-Silurian |
| Location | Northern Ireland (mostly Pomeroy, Co. Tyrone) |
| Donation Date | late 1800s |
| Specimen Records | https://arctos.database.museum/search.cfm?accn_number=2023-04 |
Major General J. E. Portlock (1794-1864) lead an early project of geological mapping of Ireland, during his time in charge of the Ordnance Survey of Ireland (Portlock 1843, Tunnicliff 1980). In addition to the maps produced, he also assembled important collections of Palaeozoic fossils. These collections, originally in Dublin, were split up in the 1850s, with many sent to London, and different portions of the collection were more thoroughly documented than others (Tunnicliff, 1980). Eventually, the bulk of Ulster specimens were transferred to the Ulster Museum. A few specimens, however, are still present in the TCDGM collection.
Tunnicliff 1980
Collection Documents
References
Evans, D. (1993). The Cephalopod Fauna of the Killey Bridge Formation (Ordovician, Ashgill), Pomeroy, County Tyrone. Irish Journal of Earth Sciences, 12, 55-189. Download
Mitchell, W. I. (1976). The Ordovician Brachiopoda from Pomeroy, Co. Tyrone. Monographs of the Palaeontographical Society, 130(545), 2–131. https://doi.org/10.1080/25761900.2022.12131731
Tunnicliff, S. P. (1980). A Catalogue of the Lower Paleozoic Fossils in the Collection of Major-General J.E. Portlock, R.E., LL.D., F.R.S., F.G.S. Etc. Ulster Museum.
Wyse Jackson, P. N. (1997). John W. Pringle (c. 1793–1861) and Ordnance Survey geological mapping in Ireland, Proceedings of the Geologists’ Association, 108, 153-156. Download
Geological Museum - Trinity College Dublin 