Leet Hill, Kirby Cane

Site of Special Scientific Interest · 52.4823, 1.5049

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Also within

Norfolk County

Condition (Natural England)

Unfavourable No Change (1)
UnitFeatureConditionArea (ha)Assessed
TM380929 — Unfavourable No Change 6.51 2023-03-06

Habitats

Fast flowing river and stream

Geology & landscape

Geological Feature: Rock Outcrop · Geological Period: Quaternary

Landscape processes: Fluvial, Glacial

Description

Description Leet Hill provides important sections through a sequence of Middle Pleistocene deposits. The basal, fluvial part of the sequence was deposited by a confluent of an extension of the River Thames and a tributary from the Midlands, which deposited the Kesgrave and the Ingham Gravels, respectively, farther west. Above are glacial outwash gravels and then an extensive sequence of chalky sands. The sands are probably glacigenic and are believed to be an inland outcrop of the Corton Sands. The sedimentary structures throughout the sequence are good and the deposits have potential for future research.

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