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Earth Science Conservation Review

Summary Full report
East Cuilcagh - PolliniskaFermanagh
Site number:321File Number:H12
ESCC:IC
Locality Type:Cave, Sinkhole Status: ASSI
Grid Reference: H16452898
Google maps: 54.20925,-7.74863
County: FermanaghCouncil area:Fermanagh & Omagh District Council
Period:Quaternary
Stages:Holocene
Site Description
image: 0321a.jpg Polliniska: sink.
Polliniska: sink.
Description:
The Polliniska-Pollnatagha-Pollprughlisk system is a series of interconnected fracture controlled rift passages entered via a number of deep vertical pots, of which only one, Polliniska, is currently an active sink. Pollprughlisk is the oldest sink,
image: 0321b.jpg Pollprughlisk: bottom of daylight shaft.
Pollprughlisk: bottom of daylight shaft.
now completely abandoned and lying ~50m inside County Cavan. Pollnatagha and Polliniska lie ~10m inside County Fermanagh. The entrance of Pollnatagha no longer takes any sinking water,
image: 0321c.jpg Pollprughlisk: caver on entrance pitch.
Pollprughlisk: caver on entrance pitch.
but a sizeable stream sinks at Polliniska and this water enters Pollnatagha 20m below the shaft entrance via a passage from Polliniska. Polliniska is 10m deep, Pollnatagha, 52m and Pollprughlisk 67m. Total horizontal development is estimated at 600m+.
Notes:
The Polliniska sinkhole is a part of the Polliniska-Pollnatagha- Pollprughlisk system of East Cuilcagh, in the Marlbank-Cuilcagh Mountain Region. For general information on the systems and features of this region, including this one, and a reference list, see site description 'Marlbank-Cuilcagh Mountain Region; East Cuilcagh Overview'.
Keywords
Rocks:Limestone
Structures:rift
Geomorph:cave, pothole, sinkhole
Measurements
Length:Width:Height:
Depth:10 mArea:  
Record type: ESCR report    
Entered by:
Last updated:24 Dec 2003
 Enlander, I., Dempster, M. & Doughty, P., 2026. East Cuilcagh - Polliniska, County Fermanagh, site details. [In] Earth Science Conservation Review.
https://www.habitas.org.uk/escr/site.php?item=321. Accessed on 2026-11-06.

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