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Earth Science Conservation Review
| Fardross Stream - Structural | Tyrone |
| Site number: | 659 | ||
| Locality Type: | Stream section | Status: | ASSI |
| Grid Reference: | H520480 Centroid | ||
| Google maps: | 54.37845,-7.19975 | ||
| County: | Tyrone | Council area: | Mid Ulster District Council |
| Period: | Carboniferous | ||
| Stages: | Visean | ||
| Lithostrat: | Benbulben Shale Formation, Bundoran Shale Formation, Dartry Limestone Formation, Glencar Limestone Formation, Mullaghmore Sandstone, Tyrone Group | ||
| Site Description | |
|---|---|
| Highlights: | |
The site contains unrivalled exposure of five of the stratigraphic formations, which form the Tyrone Group (Viséan, Lower Carboniferous). | |
| Introduction: | |
Fardross Stream is located in Fardross Forest about 3.3km SSW of Clogher Cathedral (Fig. 30). | |
| Description: | |
Within a 600m long section of the Fardross Stream there are exposures of five of the formations that constitute the Tyrone Group (Lower Carboniferous). The formations present are the Bundoran Shale, Mullaghmore Sandstone, Benbulben Shale, Glencar Limestone and the Dartry Limestone. The regional strike of the Carboniferous strata is NW-SE with dip towards the SW. The occurrence of such a diverse range of Carboniferous formations in such a relatively short and accessible stream section is unique in Northern Ireland and is due to the fact that the strata were tilted to a near vertical inclination by Variscan earth movements. The Clogher Valley Fault lies at the northern boundary of the section. This is a major fault complex which originated during late-Caledonian times and was again active during the Variscan (Mitchell, 1992). | |
| Notes: | |
For general information on the Structural Geology of Northern Ireland, directions to other Structural Geology sites and an extensive reference list see Key Site 641 - Introduction to the Structural Geology of N. Ireland. See also Key Site 253 - Fardross Stream, Clogher [Carboniferous Stratigraphic block]. | |
| Keywords | |
|---|---|
| Rocks: | Limestone, Sandstone, Shale |
| Structures: | fault, vertical strata |
| Record type: | ESCR report | Recorded by: | T.P. Johnston |
| Entered by: | E M Porter | ||
| Last updated: | 23/09/03 | ||
| Enlander, I., Dempster, M. & Doughty, P., 2026. Fardross Stream - Structural, County Tyrone, site details. [In] Earth Science Conservation Review. https://www.habitas.org.uk/escr/site.php?item=659. Accessed on 2026-11-06. |
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