| Previous Site | Next Site |
Earth Science Conservation Review
| Faughan and Dungiven Basins - Banagher | Londonderry |
| Site number: | 501 | ||
| ESCC: | IS | ||
| Locality Type: | Inland exposure | Status: | TBC |
| Grid Reference: | C678069,C668068 Centroid, Not Entered | ||
| Google maps: | 54.9056,-6.943 | ||
| County: | Londonderry | Council area: | Causeway Coast & Glens Borough Council |
| Period: | Quaternary | ||
| Site Description | |
|---|---|
| Description: | |
A 0.7km2 wedge of sand and sandy gravels located on the northwest slopes of Teeavan Hill at the mouth of Owenrigh channel. The deposit is up to 60m thick and consists of stacked foreset units containing beds dipping at 18ยง to the NE. Post deposition meltwater erosion along the Owenrigh channel bisected the sediments into two fragments. At Banagher church (267600 406600) a sharp-crested ridge (0.5km long), trending NW/SE can be traced laterally into the wedge. INTERPRETATION The position of the ridge and the exposure at (267800 406900) of poorly-sorted boulder gravels suggests esker-type sediment supply from a high energy, turbulent glacial efflux (jet), supplying sediment directly into a proglacial lake. Foreset formation resulted from the lateral dispersion of the sand and pebble gravel component. The foreset heights at this location indicate deposition into ponded water of at least 122m O.D. An exposure across the valley at (266800 406850) shows stacked foresets of well-sorted medium sand. This fragment forms a wooded ridge at the southern edge of the Dungiven outwash plain. | |
| Interpretation: | |
The position of the ridge and the exposure at (267800 406900) of poorly-sorted boulder gravels suggests esker-type sediment supply from a high energy, turbulent glacial efflux (jet), supplying sediment directly into a proglacial lake. Foreset formation resulted from the lateral dispersion of the sand and pebble gravel component. The foreset heights at this location indicate deposition into ponded water of at least 122m O.D. An exposure across the valley at (266800 406850) shows stacked foresets of well-sorted medium sand. This fragment forms a wooded ridge at the southern edge of the Dungiven outwash plain. | |
| Notes: | |
For site specific information on other sites within the Faughan and Dungiven Basins see the following sites: Key Site 499 - Faughan and Dungiven Basins - The Murnies Key Site 500 - Faughan and Dungiven Basins - Derrynaflaw Key Site 502 - Faughan and Dungiven Basins - Templemoyle Key Site 503 - Faughan and Dungiven Basins - Tamnagh Key Site 504 - Faughan and Dungiven Basins - Cumber Key Site 505 - Faughan and Dungiven Basins - Gosheden Key Site 506 - Faughan and Dungiven Basins - Fawney Key Site 507 - Faughan and Dungiven Basins - Enagh For overview information and references on the Faughan and Dungiven Basins see the following site: Key Site 470 - Faughan and Dungiven Basins - Overview For general information and references on the sand and gravel landscapes of N. Ireland, and for directions to other regional sand and gravel sites, see the following site: Key Site 439 - Introduction to the Sand and Gravel Landscapes of N. Ireland | |
| Keywords | |
|---|---|
| Rocks: | Gravel, Sand |
| Relations: | Glacio-fluvial sediment |
| Geomorph: | deltaic foresets |
| Record type: | ESCR report | ||
| Entered by: | E M Porter | ||
| Last updated: | 6 Jun 2005 | ||
| Enlander, I., Dempster, M. & Doughty, P., 2026. Faughan and Dungiven Basins - Banagher, County Londonderry, site details. [In] Earth Science Conservation Review. https://www.habitas.org.uk/escr/site.php?item=501. Accessed on 2026-11-06. |
| Previous Site | Next Site |