Tullanaguiggy

Site of Special Scientific Interest · 54.5025, -7.6643

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Also within

Fermanagh County

Habitats

Fast flowing river and stream

Geology & landscape

Geological Period: Carboniferous · Rock Type: Mudstone

Landscape processes: Fluvial

Description

Tullanaguiggy Carboniferous stratigraphy The Tullanaglare Mudstone Formation includes a group of fme-grained sediments that are the youngest, accurately dated, Carboniferous rocks exposed in Ireland. Exposure of the stratotype section of this Tullanaglare Mudstone Formation occurs within the stream bed. The formation consists of grey and green-grey sediments comprising calcareous mudstones, laminated mudstones, siltstones, quartz-clastic palaeosols and sandy palaeosols with calcrete nodules. Microscopic plant spores indicate an age at the very top of the Langsettian Stage Westphalian A, some 310 million years old My. A second sample had a miospore assemblage indicative of a basal Westphalian B age, some 297 My. These rocks accumulated mainly as ancient soils under partially waterlogged conditions. They were formed on a topographically more elevated part of an extensive alluvial plain on which coal-forming swamps and lakes were developing elsewhere in Ireland. https://www.daera-ni.gov.uk/publications/tullynaquiggy-assi

Plant communities

A9 — Fast flowing river and stream, Marginal and inundation, Pond ditch and canal, Sluggish river and stream

Potamogeton natans community

Schoenoplectus lacustris, Juncus bulbosus, Sparganium angustifolium, Sparganium erectum, Sparganium minimum, Alisma plantago-aquatica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Elodea canadensis, Lemna minor, Lemna trisulca, Nymphaea alba, Callitriche platycarpa, Callitriche stagnalis, Littorella uniflora, Potamogeton natans, Ranunculus trichophyllus, Glyceria fluitans, Chara subspinosa

A14 — Fast flowing river and stream

Myriophyllum alterniflorum community

Isolepis fluitans, Juncus bulbosus, Fontinalis antipyretica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Lemna minor, Callitriche stagnalis, Littorella uniflora, Potamogeton filiformis, Potamogeton gramineus, Potamogeton natans, Ranunculus peltatus, Chara spp., Nitella hyalina

A17 — Chalk river and stream, Fast flowing river and stream

Ranunculus penicillatus ssp. pseudofluitans community

Berula erecta, Nasturtium officinale, Elodea canadensis, Lemna minor, Callitriche stagnalis, Veronica beccabunga, Polygonum amphibium, Polygonum hydropiper, Potamogeton crispus, Potamogeton pectinatus, Ranunculus penicillatus ssp. pseudofluitans

A18 — Fast flowing river and stream

Ranunculus fluitans community

Fontinalis antipyretica, Fontinalis squamosa var. curnowii, Myriophyllum alterniflorum, Myriophyllum spicatum, Elodea canadensis, Mentha aquatica, Lemna gibba, Lemna minor, Potamogeton perfoliatus, Ranunculus fluitans, Glyceria fluitans, Phalaris arundinacea