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Earth Science Conservation Review
| Linford karst | Antrim |
| Site number: | 1276 | ||
| Locality Type: | Doline, Field, Karst | Status: | ASSI |
| Grid Reference: | D328071 | ||
| Google maps: | 54.89436,-5.93014 | ||
| County: | Antrim | Council area: | Mid & East Antrim Borough Council |
| Period: | Cretaceous, Quaternary | ||
| Stages: | Pleistocene, Holocene | ||
| Site Description | |
|---|---|
| Highlights: | |
The Linford area hosts unusual and significant surface karst landforms that have developed on the Cretaceous age Ulster White Limestone Formation. | |
| Introduction: | |
In Ireland, karst features are more commonly associated with Carboniferous limestones notably in Counties Fermanagh and Clare. Development of some karst features on the Cretaceous Ulster White Limestone is not uncommon with many sinks recorded around the Antrim plateau and one active cave system also present. However Linford is exceptional in hosting a range of classic surface karst features including dolines, a dry valley, sinks and issues in a relatively small area. | |
| Description: | |
The Ulster White Limestone Formation is found at outcrop primarily along the coast of Antrim. In Antrim, the Limestone is usually capped by Palaeogene age basalts of the Antrim Lava Group. This effectively seals much of the limestone against weathering and erosion. During the last Ice Age, the land surface was scoured by the advance and retreat of ice sheets. Evidence suggests that at Linford the ice removed the basalt covering the limestone. Subsequent development of drainage patterns and limestone dissolution led to the formation of the karst features. Dolines of the type seen at Linford probably formed through the gradual collapse of the land surface due to a combination of dissolution of the limestone and removal of finer grade material leaving a depression on the surface. There are a series of dolines at Linford approximately aligned northeast to south-west. The main surface water flow enters the site from the south but quickly disappears into a number of active or partly active sinkholes. Flow is then underground before re-emerging some 400m to the west to join another water course. A small dry valley probably indicates a former route taken by the surface flow. As the main sink upstream is substantial in size, it is probable that the valley was formed under periglacial conditions when the ground was frozen, the stream was not sinking and flow rates were considerably enhanced by seasonal melt water. The extent of the valley has been increased by limited historical quarrying. A series of apparently abandoned sink holes are also present downstream of the main sink. The site is within the Knockdhu Area of Special Archaeological Interest. The presence of some of the archaeological features here may be associated with the unusual karst landforms present at Linford. | |
| Importance: | |
Linford is the only location known in Northern Ireland with such a range of classic karst features developed on Cretaceous Ulster White Limestone | |
| Interpretation: | |
Karst landforms are created by the interaction of water and limestone and surface features are more likely to develop where the limestone has a significant areal extent as is the case at Linford. The features are thought to relate to a combination of peri-glacial and temperate conditions. | |
| Conclusions: | |
Development of karst features is more usually found on Carboniferous limestones. The assemblage of such features at Linford on Cretaceous Ulster White Limestone Formation, is notable. | |
| Keywords | |
|---|---|
| Rocks: | Flint, Limestone |
| Geomorph: | Doline, Dry Valley, Sinkhole |
| Access | |
|---|---|
| Approach: | Partially accessible from the Ulster Way |
| Restrictions: | Private land |
| Management: | |
Land use is exclusively upland pasture for sheep. | |
| Threats: | Impacts on water characteristics especially flow regime and water quality. Quarrying or development of land may also prove problematic. |
| Record type: | ASSI documentation | ||
| Entered by: | I J Enlander | ||
| Last updated: | 27 Mar 2019 | ||
| Enlander, I., Dempster, M. & Doughty, P., 2026. Linford karst, County Antrim, site details. [In] Earth Science Conservation Review. https://www.habitas.org.uk/escr/site.php?item=1276. Accessed on 2026-11-06. |
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