Kellaways - West Tytherton, River Avon
Also within
Condition (Natural England)
| Unit | Feature | Condition | Area (ha) | Assessed |
|---|---|---|---|---|
| ST944748 | — | Favourable | 3.92 | 2009-10-02 |
| ST946757 | — | Favourable | 3.92 | 2009-10-02 |
Habitats
Geology & landscape
Rock Type: Sandstone
Description
Description Kellaways West Tytherton is a river bank section along the River Avon in Wiltshire situated one kilometre south east of Langley Burrell. The site is the historical type locality for the Callovian Stage; the stage name being derived from a Latinisation of 'Kellaways'. The locality includes a number of highly fossiliferous exposures of the famous 'Kellaways Rock', a calcareous sandstone yielding abundant well preserved bivalves, gastropods, brachiopods, belemnites and ammonites. The site includes the designated type localities of the Kellaways Sand Member, which includes the 'Kellaways Rock' itself and also the underlying Kellaways Clay Member of the Kellaways Formation in a borehole section. The Kellaways district is also the type locality of many important invertebrate species, especially ammonites; the latter include the internationally important stratigraphic index species Sigalocerascalloviense Sowerby and Sigaloceras micans Buckman and around 17 other nominal species. The Kellaways exposures are of great international and historical significance and constitute the most important single Callovian locality in Britain.
Plant communities
A9 — Fast flowing river and stream, Marginal and inundation, Pond ditch and canal, Sluggish river and stream
Potamogeton natans community
Show 20 indicator speciesSchoenoplectus 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
Show 15 indicator speciesIsolepis 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
Show 11 indicator speciesBerula 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
Show 12 indicator speciesFontinalis 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