Sidestrand and Trimingham Cliffs

Site of Special Scientific Interest · 52.9029, 1.3823

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Norfolk County Norfolk Coast Scenic Area King Charles Way - Sea Palling to Weybourne National Trail

Condition (Natural England)

Unfavourable Declining (2) Favourable (1)
UnitFeatureConditionArea (ha)Assessed
TG255405 — Unfavourable Declining 17.83 2024-12-10
TG276392 — Unfavourable Declining 104.51 2024-12-10
TG302377 — Favourable 11.51 2008-09-11

Climate exposure

This is about exposure to a nationwide pressure this habitat type carries — not a verdict on this site's own management.

Coastal

Coastal habitats are exposed to sea-level rise and storm erosion. Where hard sea defences sit behind them, there's nowhere landward to retreat to — a squeeze that keeps compressing the habitat no matter how well it's managed.

Habitats

Hard cliff and cliff slope

Geology & landscape

Geological Period: Cretaceous, Quaternary · Rock Type: Chalk

Landscape processes: Coastal, Glacial

Description

Description This stretch of cliffs between Overstrand and Mundesley on the north east coast of Norfolk provides a fine series of geological exposures in unconsolidated Pleistocene sediments and in the underlying chalk. These cliffs, which extend for a distance of 6.5 kilometres and are up to 60 metres high, are subject to frequent cliff falls and slumping. This mobility creates a mosaic of habitats from bare clay and sand to ruderal communities and semi stabilised grassland with occasional seepage lines which support an outstanding assemblage of invertebrates. Four aspects of the geology of the site are of special interest; the chalk, the Pleistocene sediments, fossil vertebrates and mass movement. The chalk is exposed on the foreshore and cliffs in a series of blocks which have been thrust upwards by glacial action. It has a rich fossil invertebrate fauna which has enabled much of the chalk to be assigned to the Lower Maastrichtian stage i.e. very late Cretaceous age. These exposures comprise the only significant outcrops of chalk of this age in Britain and are therefore also the youngest Mesozoic rocks in the British Isles. The common occurrence of the belemnite, Belemnella lanceolata Schlotheim indicates the lowest of four zones of the continental Maastrichtian stage and detailed studies of the brachiopod faunas have now facilitated detailed correlations with Lower Maastrichtian successions in Denmark, Sweden, Germany and Poland. A composite Lower Maastrichtian succession has been reconstructed by correlating the several chalk masses at Sidestrand and Trimingham. The succession includes the type localities and reference sections of four lithographic units namely the Sidestrand Chalk, the Trimingham Sponge Beds, the Little Marl Point and the Beacon Hill Grey Chalk members. Only the Sidestrand Chalk Member is known at any other locality in Britain. The Maastrichtian succession of the Sidestrand Trimingham district is of fundamental importance to British Cretaceous geology and also has a wider significance to studies of the latest Cretaceous elsewhere in north west Europe. The cliffs at Sidestrand expose one of the best pre glacial stratigraphic sequences in England. Analysis of their faunal and floral elements has led to the development of a detailed picture of the early Pleistocene environments in north Norfolk. At this locality unique domes of chalk thrust upwards by diapiric or glacio tectonic processes are exposed in cliff sections and on the foreshore. Overlying sediments of the Cromer Forest Bed formation, displaced from their usual position at and below beach level, are consequently well exposed. The sequence includes fossiliferous Pre Pastonian and Pastonian marine sediments, unconformably overlain by deposits of Cromerian age. This unconformity, of great importance for the interpretation of the Cromer Forest Bed Formation, is particularly well shown. Sampling of the pre pastonian and Pastonian beds has yielded an interesting mammalian fauna. The assemblage collected from the different sites are essentially the same and is dominated by the vole, Mimomys pliocaenicus. Other species recorded include other vole species e.g. Mimomys blanci, a lemming Lemnus sp. and two species of desman Galemys kormosi and Desmana thermalis. At present it is thought that the composition of the Sidestrand vertebrate fauna suggests an age of 1.7 million years and is equivalent to the continental Villanyian. The entire length of these cliffs has a substantial history of impressive rotational slumping affecting the Pleistocene deposits. The Sidestrand to Trimingham stretch in particular is the finest site of slumping unconsolidated sediments in Britain. Huge collapses of the cliffs continue to occur, in places breaking through an elaborate set of coastal defence works which stretch along part of this coast. This is probably the best soft rock cliff site for invertebrates in East Anglia. There are modern records for a number of rare coleoptera including Nebria livida and isopoda associated with the crevices and fallen debris at the bases of the cliffs. In addition there are old records for two Red Data Book beetles Dyschirius obscurus and Bledius filipes. Suitable conditions for these elusive and mobile species exist on this stretch of the coast and overlooked colonies may still be present. The cliff top flora includes a large colony of species purple broomrape Orobanche purpurea, a Red Data Book species, which grows in grassland close to the cliff edge.

Species mentioned

English name
search for this in other sites		 Latin name
search with Google		 IUCN / Red List Type Family
ground beetle Dyschirius obscurus EN beetle ground carabidae
purple broomrape Orobanche purpurea Not listed in GB list herb orobanchaceae

Plant communities

H7 — Hard cliff and cliff slope, Lowland dry heath

Calluna vulgaris-Scilla verna heath

Salix repens, Empetrum nigrum subsp.nigrum, Calluna vulgaris, Erica cinerea, Erica tetralix, Erica vagans, Juniperus communis, Ulex europaeus, Carex caryophyllea, Carex flacca, Carex nigra, Carex panicea, Carex pulicaris, Carex serotina, Luzula campestris, Luzula multiflora, Selaginella selaginoides, Hypnum cupressiforme, Frullania tamarisci, Cladonia chlorophaea, Cladonia rangiformis, Daucus carota, Achillea millefolium, Hypochaeris radicata, Leontodon saxatilis, Leucanthemum vulgare, Scorzoneroides autumnalis, Serratula tinctoria, Jasione montana, Succisa pratensis, Cerastium diffusum, Cerastium fontanum, Silene uniflora, Sedum anglicum, Anthyllis vulneraria, Astragalus danicus, Genista pilosa, Lotus corniculatus, Trifolium repens, Centaurium erythraea, Thymus praecox, Scilla verna, Dactylorhiza purpurella, Euphrasia officinalis, Plantago coronopus, Plantago lanceolata, Plantago maritima, Armeria maritima, Polygala serpyllifolia, Polygala vulgaris, Rumex acetosa, Primula vulgaris, Filipendula vulgaris, Potentilla erecta, Galium verum, Viola riviniana, Agrostis capillaris, Agrostis stolonifera, Aira caryophyllea, Aira praecox, Anthoxanthum odoratum, Dactylis glomerata, Danthonia decumbens, Festuca ovina, Festuca rubra, Holcus lanatus, Koeleria macrantha, Molinia caerulea, Nardus stricta, Chara curta

H8 — Hard cliff and cliff slope, Lowland dry heath, Upland dry heath

Calluna vulgaris-Ulex gallii heath

Calluna vulgaris, Erica cinerea, Erica tetralix, Vaccinium myrtillus, Ulex europaeus, Ulex gallii, Carex binervis, Carex caryophyllea, Carex flacca, Carex pilulifera, Campylopus flexuosus, Dicranum scoparium, Hypnum cupressiforme, Pleurozium schreberi, Pseudoscleropodium purum, Rhytidiadelphus squarrosus, Polytrichum juniperinum, Polytrichum piliferum, Cladonia impexa, Cladonia squamosa, Hypochaeris radicata, Jasione montana, Lotus corniculatus, Hypericum pulchrum, Teucrium scorodonia, Thymus praecox, Scilla verna, Linum catharticum, Pedicularis sylvatica, Digitalis purpurea, Plantago lanceolata, Plantago maritima, Polygala serpyllifolia, Rumex acetosella, Potentilla erecta, Poterium sanguisorba, Rubus fruticosus agg., Galium saxatile, Galium verum, Viola lactea, Viola riviniana, Agrostis capillaris, Agrostis curtisii, Agrostis stolonifera, Agrostis vinealis, Aira praecox, Anthoxanthum odoratum, Avenula pubescens, Brachypodium sylvaticum, Dactylis glomerata, Danthonia decumbens, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Holcus lanatus, Molinia caerulea, Nardus stricta, Pteridium aquilinum, Chara curta

MC1 — Hard cliff and cliff slope

Crithmum maritimum-Spergularia rupicola maritime rock-crevice community

Tortella flavovirens, Crithmum maritimum, Daucus carota, Inula crithmoides, Tripleurospermum maritimum, Cochlearia danica, Cochlearia officinalis, Cerastium diffusum, Silene uniflora, Spergularia rupicola, Atriplex hastata, Plantago coronopus, Plantago maritima, Armeria maritima, Limonium binervosum, Catapodium marinum, Festuca rubra, Parapholis incurva, Asplenium marinum

MC2 — Hard cliff and cliff slope

Armeria maritima-Ligusticum scoticum maritime rock-crevice community

Schistidium maritimum, Ligusticum scoticum, Scorzoneroides autumnalis, Tripleurospermum maritimum, Cochlearia officinalis, Cerastium fontanum, Silene uniflora, Spergularia rupicola, Atriplex hastata, Sedum rosea, Plantago coronopus, Plantago maritima, Armeria maritima, Rumex crispus, Agrostis stolonifera, Festuca rubra, Asplenium marinum

MC3 — Hard cliff and cliff slope

Rhodiola rosea-Armeria maritima 36-ledge community

Angelica sylvestris, Ligusticum scoticum, Scorzoneroides autumnalis, Tripleurospermum maritimum, Silene dioica, Silene uniflora, Sedum rosea, Lotus corniculatus, Plantago lanceolata, Plantago maritima, Armeria maritima, Rumex acetosa, Agrostis stolonifera, Festuca rubra, Holcus lanatus

MC4 — Hard cliff and cliff slope

Brassica oleracea 36-ledge community

Daucus carota, Centaurea nigra, Centaurea scabiosa, Cirsium arvense, Echium vulgare, Jacobaea vulgaris, Leucanthemum vulgare, Pilosella officinarum, Senecio vulgaris, Sonchus oleraceus, Taraxacum officianalis, Tragopogon pratensis, Brassica nigra, Brassica oleracea, Cheiranthus cheiri, Silene nutans, Silene uniflora, Sedum acre, Anthyllis vulneraria, Ononis repens, Teucrium scorodonia, Plantago coronopus, Plantago lanceolata, Armeria maritima, Rumex acetosa, Potentilla reptans, Galium aparine, Agrostis stolonifera, Brachypodium pinnatum, Bromus hordeaceous, Dactylis glomerata, Festuca rubra, Schedonorus arundinaceus

MC5 — Hard cliff and cliff slope

Armeria maritima-Cerastium diffusum ssp. diffusum maritime therophyte community

Carex flacca, Hypnum cupressiforme, Tortella flavovirens, Cladonia chlorophaea, Cladonia foliacea, Cladonia rangiformis, Collema spp., Daucus carota, Achillea millefolium, Bellis perennis, Cirsium acaule, Echium vulgare, Jacobaea vulgaris, Leontodon saxatilis, Pilosella officinarum, Senecio vulgaris, Sonchus oleraceus, Taraxacum officianalis, Tripleurospermum maritimum, Myosotis ramosissima, Brassica oleracea, Cochlearia danica, Cochlearia officinalis, Diplotaxis muralis, Jasione montana, Arenaria serpyllifolia, Cerastium diffusum, Cerastium fontanum, Herniaria ciliolata, Sagina apetala, Sagina maritima, Silene uniflora, Spergularia rupicola, Atriplex littoralis, Sedum acre, Sedum anglicum, Euphorbia portlandica, Anthyllis vulneraria, Hippocrepis comosa, Lotus corniculatus, Trifolium arvense, Trifolium occidentale, Trifolium repens, Trifolium scabrum, Vicia sativa, Centaurium erythraea, Eriodium cicutarium, Salvia verbenaca, Thymus praecox, Scilla autumnalis, Scilla verna, Radiola linoides, Plantago coronopus, Plantago lanceolata, Plantago maritima, Veronica arvensis, Armeria maritima, Ranunculus acris, Reseda lutea, Filipendula vulgaris, Poterium sanguisorba, Galium verum, Agrostis capillaris, Agrostis stolonifera, Aira caryophyllea, Aira praecox, Brachypodium pinnatum, Bromus hordeaceous, Catapodium marinum, Catapodium rigidum, Dactylis glomerata, Festuca ovina, Festuca rubra, Holcus lanatus, Koeleria macrantha, Lolium perenne, Schedonorus arundinaceus

MC6 — Coastal vegetated shingle, Hard cliff and cliff slope

Atriplex prostrata-Beta vulgaris ssp. maritima sea-bird cliff community

Daucus carota, Sonchus oleraceus, Taraxacum officianalis, Tripleurospermum maritimum, Cochlearia officinalis, Silene uniflora, Spergularia rupicola, Atriplex hastata, Malva arborea, Plantago coronopus, Armeria maritima, Polygonum aviculare, Rumex crispus, Bromus hordeaceous, Catapodium marinum, Dactylis glomerata, Festuca rubra

MC7 — Hard cliff and cliff slope

Stellaria media-Rumex acetosa sea-bird cliff community

Juncus articulatus, Scorzoneroides autumnalis, Senecio vulgaris, Tripleurospermum maritimum, Cochlearia officinalis, Cerastium fontanum, Cerastium glomeratum, Silene uniflora, Spergula arvensis, Stellaria media agg., Atriplex hastata, Sedum anglicum, Trifolium repens, Plantago maritima, Armeria maritima, Polygonum aviculare, Rumex acetosa, Rumex crispus, Potentilla anserina, Agrostis stolonifera, Festuca rubra, Holcus lanatus, Poa annua, Poa pratensis

MC8 — Hard cliff and cliff slope

Festuca rubra-Armeria maritima maritime grassland

Carex caryophyllea, Carex distans, Kindbergia praelonga, Tortella flavovirens, Trichostomum brachydontium, Angelica sylvestris, Crithmum maritimum, Daucus carota, Ligusticum scoticum, Achillea millefolium, Cirsium arvense, Hypochaeris radicata, Inula crithmoides, Leontodon saxatilis, Scorzoneroides autumnalis, Sonchus oleraceus, Tripleurospermum maritimum, Brassica oleracea, Cochlearia danica, Cochlearia officinalis, Cerastium diffusum, Cerastium fontanum, Sagina apetala, Sagina maritima, Silene uniflora, Spergularia rupicola, Sedum anglicum, Anthyllis vulneraria, Lotus corniculatus, Trifolium repens, Centaurium erythraea, Scilla verna, Plantago coronopus, Plantago lanceolata, Plantago maritima, Armeria maritima, Rumex acetosa, Potentilla erecta, Agrostis stolonifera, Brachypodium pinnatum, Catapodium marinum, Dactylis glomerata, Festuca rubra, Holcus lanatus, Poa subcaerulea

MC9 — Hard cliff and cliff slope

Festuca rubra-Holcus lanatus maritime grassland

Empetrum nigrum subsp.nigrum, Carex caryophyllea, Carex flacca, Carex nigra, Carex panicea, Luzula campestris, Hypnum cupressiforme, Kindbergia praelonga, Pseudoscleropodium purum, Rhytidiadelphus squarrosus, Trichostomum brachydontium, Cladonia chlorophaea, Peltigera canina, Angelica sylvestris, Conopodium majus, Daucus carota, Heracleum sphondylium, Achillea millefolium, Bellis perennis, Centaurea nigra, Hypochaeris radicata, Jacobaea vulgaris, Leontodon saxatilis, Leucanthemum vulgare, Pilosella officinarum, Scorzoneroides autumnalis, Serratula tinctoria, Solidago virgaurea, Cochlearia officinalis, Campanula rotundifolia, Cerastium diffusum, Cerastium fontanum, Sagina apetala, Silene uniflora, Sedum anglicum, Euphorbia portlandica, Anthyllis vulneraria, Genista tinctoria, Lotus corniculatus, Trifolium repens, Geranium sanguineum, Thymus praecox, Scilla verna, Euphrasia officinalis, Plantago lanceolata, Plantago maritima, Armeria maritima, Rumex acetosa, Rumex crispus, Ficaria verna, Ranunculus acris, Potentilla erecta, Galium verum, Viola riviniana, Agrostis capillaris, Agrostis stolonifera, Aira praecox, Anthoxanthum odoratum, Brachypodium sylvaticum, Dactylis glomerata, Danthonia decumbens, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Holcus lanatus, Koeleria macrantha, Poa pratensis

MG1 — Brownfield, Hard cliff and cliff slope

Arrhenatherum elatius grassland

Hedera helix, Luzula campestris, Brachythecium rutabulum, Kindbergia praelonga, Pseudoscleropodium purum, Rhytidiadelphus squarrosus, Aegopodium podagraria, Anthriscus sylvestris, Conopodium majus, Daucus carota, Heracleum sphondylium, Pimpinella major, Pimpinella saxifraga, Achillea millefolium, Artemisia vulgaris, Carduus nutans, Centaurea nigra, Centaurea scabiosa, Cirsium arvense, Cirsium vulgare, Hypochaeris radicata, Jacobaea vulgaris, Leontodon hispidus, Leucanthemum vulgare, Sonchus asper, Taraxacum officianalis, Capsella bursa-pastoris, Campanula rotundifolia, Knautia arvensis, Scabiosa columbaria, Cerastium fontanum, Silene nutans, Stellaria graminea, Convolvulus arvensis, Lathyrus pratensis, Lotus corniculatus, Lotus pedunculatus, Trifolium pratense, Trifolium repens, Vicia cracca, Vicia sativa, Vicia sepium, Geranium dissectum, Hypericum perforatum, Clinopodium vulgare, Glechoma hederacea, Lamium album, Origanum vulgare, Teucrium scorodonia, Thymus praecox, Linum catharticum, Chamerion angustifolium, Epilobium hirsutum, Epipactis purpurata, Rhinanthus minor, Papaver dubium, Plantago lanceolata, Veronica chamaedrys, Rumex acetosa, Rumex crispus, Rumex obtusifolius, Primula veris, Primula vulgaris, Ficaria verna, Ranunculus acris, Ranunculus bulbosus, Ranunculus repens, Agrimonia eupatoria, Filipendula ulmaria, Potentilla reptans, Poterium sanguisorba, Rubus fruticosus agg., Galium aparine, Galium mollugo sens.lat., Galium verum, Urtica dioica, Agrostis capillaris, Agrostis stolonifera, Alopecurus pratensis, Anisantha sterilis, Anthoxanthum odoratum, Arrhenatherum elatius, Avenula pubescens, Brachypodium sylvaticum, Briza media, Bromopsis erecta, Bromus hordeaceous, Cynosurus cristatus, Dactylis glomerata, Elytrigia repens, Festuca ovina, Festuca rubra, Holcus lanatus, Holcus mollis, Lolium perenne, Phleum pratense, Poa pratensis, Poa trivialis, Schedonorus pratensis, Trisetum flavescens, Pteridium aquilinum, Chara vulgaris

MG10 — Coastal floodplain grazing marsh, Hard cliff and cliff slope, Upland rush pasture

Holcus lanatus-Juncus effusus rush-pasture

Carex hirta, Carex panicea, Juncus articulatus, Juncus effusus, Juncus inflexus, Calliergonell cuspidatum, Kindbergia praelonga, Angelica sylvestris, Oenanthe crocata, Caltha palustris, Cirsium arvense, Cirsium palustre, Pulicaria dysenterica, Senecio aquaticus, Taraxacum officianalis, Myosotis scorpioides, Cardamine pratensis, Cerastium fontanum, Silene flos-cuculi, Stellaria alsine, Equisetum arvense, Equisetum palustre, Lotus pedunculatus, Trifolium pratense, Trifolium repens, Vicia cracca, Iris pseudacorus, Mentha aquatica, Plantago lanceolata, Plantago major, Polygonum hydropiper, Rumex acetosa, Rumex conglomeratus, Rumex crispus, Rumex obtusifolius, Primula vulgaris, Ranunculus acris, Ranunculus repens, Filipendula ulmaria, Potentilla anserina, Urtica dioica, Agrostis capillaris, Agrostis stolonifera, Alopecurus geniculatus, Alopecurus pratensis, Anthoxanthum odoratum, Cynosurus cristatus, Dactylis glomerata, Festuca rubra, Festulolium loliaceum, Glyceria fluitans, Holcus lanatus, Lolium perenne, Phalaris arundinacea, Phleum pratense, Poa pratensis, Poa trivialis, Schedonorus pratensis

MG11 — Brownfield, Coastal floodplain grazing marsh, Hard cliff and cliff slope

Festuca rubra-Agrostis stolonifera-Potentilla anserina grassland

Atriplex portulacoides, Carex arenaria, Carex distans, Juncus articulatus, Juncus bufonius, Juncus gerardii, Brachythecium rutabulum, Odontites verna, Oenanthe lachenalii, Bellis perennis, Cirsium arvense, Cirsium vulgare, Hypochaeris radicata, Matricaria discoidea, Scorzoneroides autumnalis, Senecio aquaticus, Sonchus asper, Taraxacum officianalis, Tripleurospermum maritimum, Cochlearia anglica, Cochlearia officinalis, Cerastium fontanum, Honckenya peploides, Sagina procumbens, Silene dioica, Silene uniflora, Stellaria media agg., Atriplex hastata, Lotus corniculatus, Trifolium repens, Triglochin maritimum, Plantago lanceolata, Plantago major, Plantago maritima, Polygonum aviculare, Rumex acetosa, Rumex crispus, Rumex obtusifolius, Glaux maritima, Ranunculus acris, Ranunculus repens, Potentilla anserina, Potentilla reptans, Galium aparine, Urtica dioica, Agrostis capillaris, Agrostis stolonifera, Alopecurus geniculatus, Ammophila arenaria, Arrhenatherum elatius, Bromus hordeaceous, Dactylis glomerata, Elytrigia juncea, Elytrigia repens, Festuca rubra, Holcus lanatus, Lolium perenne, Parapholis strigosa, Phleum pratense, Poa annua, Poa pratensis, Poa trivialis, Schedonorus arundinaceus, Schedonorus pratensis

MG12 — Coastal floodplain grazing marsh, Hard cliff and cliff slope

Festuca arundinacea grassland

Atriplex portulacoides, Carex distans, Carex nigra, Carex otrubae, Eleocharis uniglumis, Juncus acutiflorus, Juncus articulatus, Juncus gerardii, Juncus inflexus, Juncus maritimus, Kindbergia praelonga, Odontites verna, Oenanthe crocata, Oenanthe lachenalii, Torilis japonica, Cirsium arvense, Hypochaeris radicata, Scorzoneroides autumnalis, Sonchus arvensis, Taraxacum officianalis, Tripleurospermum maritimum, Cerastium fontanum, Stellaria media agg., Atriplex hastata, Equisetum palustre, Lathyrus pratensis, Lotus corniculatus, Trifolium pratense, Trifolium repens, Vicia cracca, Iris pseudacorus, Triglochin maritimum, Triglochin palustre, Plantago lanceolata, Plantago major, Plantago maritima, Rumex crispus, Glaux maritima, Ranunculus acris, Potentilla anserina, Galium palustre, Agrostis capillaris, Agrostis stolonifera, Anthoxanthum odoratum, Arrhenatherum elatius, Cynosurus cristatus, Dactylis glomerata, Elytrigia atherica, Elytrigia repens, Festuca rubra, Holcus lanatus, Lolium perenne, Phragmites australis, Poa pratensis, Schedonorus arundinaceus, Schedonorus pratensis