| Site Type: | Pothole | | Site Status: | ASSI | | Council area: | Fermanagh & Omagh District Council | | Grid Reference: | H09344765 | | Bing maps: | 54.37742,-7.85686 | | Google maps: | 54.37742,-7.85686 | | Rocks |
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| Rock Age: | Quaternary, Carboniferous (Asbian, Holocene, Visean) | | Rock Name: | Dartry Limestone Formation, Knockmore Limestone Member | | Rock Type: | Limestone | | Interest |
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| Other interest: | joints, pothole, sinkhole |
| Summary of site: |
| This pothole is formed along a single joint (a natural fracture, usually strongly directional, with no displacement) which exerts directional control. The entrance, in a small depression, leads to a first pitch initially inclined, then stepped, ending in a bedding plane. An upstream crawl ends in a chamber where water enters through the roof. Downstream leads to a second shaft, almost 30m deep, where the water vanishes into a narrow cleft in the floor. A 6m climb leads to the head of a 12m final pitch. Here the stream drains into an impenetrable crack. The long, deep shafts are all developed in the Knockmore Limestone Member of the Dartry Limestone. | | The stream passing through Aughnakeeran is believed to join the drainage through Pollanaffrin. |
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