Masson Hill
Also within
Condition (Natural England)
| Unit | Feature | Condition | Area (ha) | Assessed |
|---|---|---|---|---|
| SK264599 | — | Favourable | 3.45 | 2010-03-26 |
| SK276599 | — | Favourable | 7.97 | 2007-03-24 |
| SK279596 | — | Favourable | 2.97 | 2021-05-11 |
| SK287586 | — | Favourable | 0.89 | 2010-03-26 |
| SK288583 | — | Favourable | 3.53 | 2012-11-09 |
| SK288584 | — | Favourable | 0.92 | 2010-08-31 |
| SK288585 | — | Unfavourable Recovering | 0.74 | 2010-08-31 |
| SK288586 | — | Unfavourable Recovering | 0.65 | 2010-12-21 |
| SK288591 | — | Unfavourable Recovering | 1.2 | 2011-10-26 |
| SK289588 | — | Favourable | 4.18 | 2010-03-26 |
| SK289589 | — | Unfavourable Recovering | 1.39 | 2012-09-06 |
| SK289592 | — | Favourable | 1.36 | 2010-03-26 |
| SK290579 | — | Unfavourable No Change | 3.78 | 2010-08-31 |
| SK290583 | — | Unfavourable Recovering | 0.81 | 2010-12-21 |
| SK290587 | — | Favourable | 1.95 | 2012-09-06 |
| SK290588 | — | Favourable | 1.66 | 2012-09-06 |
| SK290592 | — | Favourable | 3.18 | 2010-08-31 |
| SK291576 | — | Favourable | 0.88 | 2010-03-26 |
| SK291584 | — | Favourable | 0.28 | 2010-03-26 |
| SK291585 | — | Unfavourable Recovering | 13.57 | 2012-10-17 |
| SK291587 | — | Favourable | 0.54 | 2012-09-06 |
| SK292575 | — | Unfavourable Recovering | 1.5 | 2009-03-29 |
| SK292594 | — | Favourable | 14.51 | 2010-08-31 |
| SK293574 | — | Favourable | 1.36 | 2010-09-29 |
| SK295594 | — | Favourable | 1.64 | 2010-03-26 |
Geology & landscape
Geological Feature: Cave / Cavern, Igneous Intrusion · Geological Period: Quaternary
Landscape processes: Glacial, Karst, Volcanic / Igneous
Description
Area, 93.4 ha. 230.8 ac. Description Masson Hill is situated on the western flank of Matlock Dale rising to 330 metres above sea level. The Hill has a core of basaltic lavas, ashes and agglomerates, pierced by a plug of dolerite. The dolerite is exposed near the summit and the succession of limestones and interlayered lavas dip off to north, east and south. A series of caverns and solution caves with associated mineralisation are encompassed by the main area of the site which extends from the top of Masson Hill itself, eastwards to the bottom of Matlock Dale. There are two outlying areas of the site to the south which are of mineralogical interest and three outlying areas of the site to the north which contain important cave systems. The overlying soils are mainly well drained loams, which are shallow and calcareous in places. Within the site are areas of high biological interest. These support a species rich grassland overlying a complex of mostly impoverished soils which are calcareous, neutral, leached acidic, or contaminated by mineral spoil. There are, additionally, areas of ancient and semi natural broadleaved woodland on the south east of Masson Hill and along the western side of Matlock Dale. Geological Interest The site consists of an interrelated complex of naturally formed cave passages and mine galleries covering a large area. They are a classic mineral locality for flat and pipe veins containing a wide variety of different minerals including fluorspar, calcite and barytes as well as lead and copper associations. Some of the caves are of an exceptional age, with an early phase of formation that occurred more than 180 million years ago, before the time of mineralisation that lined pre existing caves with minerals. A later phase of cave development dates from the Ice Age Pleistocene. The sediments washed into the caves by glacial melt waters and the stalagmite sequences, provide an incomparable record of the full Pleistocene history of this area. Detached sections of the site cover Jug Holes with its unique bee hivestalagmite formations developed on volcanic rock toadstone; Oxclose Mine with its multi coloured flow stones; and Brightgate Cave containing joint maze and bedding passages unmodified by mining. Biological Interest The species rich calcareous and acidic grasslands are dominated by sheep’s fescue Festuca ovina with acidic areas characterised by heath bedstraw Galium saxatile, sheep’s sorrel Rumex acetosella and bitter vetch Lathyrus montanus. The calcareous grasslands are characterised by common rock rose Helianthemum nummularium, kidney vetch Anthyllis vulneraria and abundant wild thyme Thymus praecox with good populations of the locally uncommon autumn gentian Gentianella amarella and frog orchid Dactylorhiza viridis. The unimproved neutral grasslands are dominated by meadow fescue Schedonorus pratensis and crested dog’s tail Cynosurus cristatus and characterised by devil’s bit scabious Succisa pratensis and great burnet Sanguisorba officinalis, with common spotted orchid Dactylorhiza fuchsii among a diverse flora. Areas of spoil associated with old mineral workings support good populations of the nationally rare spring sandwort or 'leadwort' Minuartia verna and alpine pennycress Noccaea caerulescens. There is a large population of fragrant orchid Gymnadenia conopsea on one area of spoil heaps. Substantial areas of ancient woodland have been converted to mature beech Fagus sylvatica and sycamore Acer pseudoplatanus plantation, but small areas of semi-natural woodland persist. These are dominated by ash Fraxinus excelsior and elm Ulmus glabra with pedunculate oak Quercus robur, yew Taxus baccata and the nationally rare large leaved lime Tilia platyphyllos. Within these more natural areas the understorey is well structured and contains a variety of shrub species including field maple Acer campestre, guelder rose Viburnum opulus and dogwood Cornus sanguinea. The ground flora is dominated locally by ivy Hedera helix and dog’s mercury Mercurialis perennis, with abundant woodruff Galium odoratum, sanicle Sanicula europaea, wood melick Melica uniflora, bearded couch Elymus caninus and other species which are indicative of ancient woodlands. Several species of bat frequently use the mines and cave systems of Masson Hill as roosting and hibernation sites. Jugholes Cave has a colony of the locally uncommon whiskered bat Myotis mystacinus which has been well documented over a long period.
Species mentioned
Show the 34 species mentioned in the description, with red-list statusPlant communities
CG12 — Alpine and subalpine calcareous grassland, High montane heath and snow bed
Festuca ovina-Alchemilla alpina-Silene acaulis dwarf-herb community
Show 125 indicator speciesEmpetrum nigrum, Calluna vulgaris, Kalmia procumbens, Vaccinium myrtillus, Salix herbacea, Carex bigelowii, Carex demissa, Carex panicea, Carex pilulifera, Carex pulicaris, Juncus trifidus, Juncus triglumis, Luzula campestris, Luzula multiflora, Luzula spicata, Luzula sylvatica, Diphasiastrum alpinum, Huperzia selago, Selaginella selaginoides, Andreaea alpina, Aulacomnium turgidum, Bartramia ithyphylla, Breutelia chrysocoma, Mnium hornum, Dicranum scoparium, Ditrichum flexicaule, Racomitrium canescens sens.lat., Racomitrium fasciculare, Racomitrium lanuginosum, Ctenidium molluscum, Hylocomium splendens, Hypnum callichroum, Hypnum cupressiforme, Hypnum hamulosum, Lescuraea incurvata, Pleurozium schreberi, Pseudoscleropodium purum, Rhytidiadelphus loreus, Rhytidiadelphus squarrosus, Rhytidiadelphus triquetrus, Sanionia uncinata, Thuidium delicatulum, Thuidium tamariscinum, Pogonatum urnigerum, Polytrichastrum alpinum, Tortella tortuosa, Barbilophozia hatcheri, Barbilophozia lycopodioides, Diplophyllum albicans, Frullania tamarisci, Nardia scalaris, Plagiochila asplenioides, Ptilidium ciliare, Scapania subalpina, Tritomaria quinquedentata, Cetraria islandica, Cladonia arbuscula, Cladonia gracilis, Cladonia pyxidata, Cladonia uncialis, Peltigera canina, Achillea millefolium, Antennaria dioica, Gnaphalium supinum, Hieraclium spp., Scorzoneroides autumnalis, Solidago virgaurea, Taraxacum officianalis, Myosotis alpestris, Cardamine pratensis, Draba norvegica, Campanula rotundifolia, Succisa pratensis, Cerastium alpinum, Cerastium fontanum, Minuartia sedoides, Sagina saginoides, Silene acaulis, Sedum rosea, Vaccinium vitis-idaea, Thymus praecox, Linum catharticum, Epilobium anagallidifolium, Euphrasia frigida, Euphrasia officinalis, Oxalis acetosella, Plantago maritima, Veronica alpina, Veronica officinalis, Veronica serpyllifolia, Armeria maritima, Polygonum viviparum, Rumex acetosa, Anemone nemorosa, Ranunculus acris, Thalictrum alpinum, Trollius europaeus, Alchemilla alpina, Alchemilla filicaulis, Filipendula ulmaria, Geum rivale, Potentilla crantzii, Potentilla erecta, Sibbaldia procumbens, Galium boreale, Galium saxatile, Saxifraga aizoides, Saxifraga hypnoides, Saxifraga nivalis, Saxifraga oppositifolia, Saxifraga stellaris, Viola lutea, Viola palustris, Viola riviniana, Agrostis canina, Agrostis capillaris, Anthoxanthum odoratum, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Festuca vivipara, Nardus stricta, Poa pratensis, Botrychium lunaria
U7 — High montane heath and snow bed
Nardus stricta-Carex bigelowii grass-heath
Show 74 indicator speciesEmpetrum nigrum, Calluna vulgaris, Vaccinium myrtillus, Vaccinium uliginosum, Salix herbacea, Carex bigelowii, Carex nigra, Carex panicea, Carex pilulifera, Eriophorum vaginatum, Trichophorum cespitosum, Juncus squarrosus, Juncus trifidus, Luzula multiflora, Luzula sylvatica, Diphasiastrum alpinum, Huperzia selago, Campylopus flexuosus, Dicranum fuscescens, Dicranum scoparium, Kiaeria starkei, Racomitrium lanuginosum, Hylocomium splendens, Hypnum cupressiforme, Plagiothecium undulatum, Pleurozium schreberi, Rhytidiadelphus loreus, Rhytidiadelphus squarrosus, Polytrichastrum alpinum, Polytrichum commune, Polytrichum juniperinum, Polytrichum piliferum, Polytrichum strictum, Sphagnum capillifolium, Anastrepta orcadensis, Anastrophyllum donianum, Barbilophozia floerkei, Barbilophozia hatcheri, Bazzania tricrenata, Diplophyllum albicans, Lophozia sudetica, Pleurozia purpurea, Ptilidium ciliare, Scapania gracilis, Scapania nemorea, Cetraria delisei, Cetraria islandica, Cladonia arbuscula, Cladonia bellidiflora, Cladonia coccifera, Cladonia gracilis, Cladonia impexa, Cladonia leucophaea, Cladonia pyxidata, Cladonia rangiferina, Cladonia tenuis, Cladonia uncialis, Gnaphalium supinum, Solidago virgaurea, Cornus suecica, Vaccinium vitis-idaea, Thymus praecox, Narthecium ossifragum, Rumex acetosa, Alchemilla alpina, Potentilla erecta, Galium saxatile, Viola palustris, Agrostis capillaris, Agrostis vinealis, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Nardus stricta
U8 — High montane heath and snow bed
Carex bigelowii-Polytrichum alpinum sedge-heath
Show 39 indicator speciesVaccinium myrtillus, Salix herbacea, Carex bigelowii, Juncus trifidus, Luzula spicata, Huperzia selago, Pohlia nutans, Dicranum fuscescens, Dicranum scoparium, Racomitrium canescens sens.lat., Racomitrium fasciculare, Racomitrium lanuginosum, Hylocomium splendens, Pleurozium schreberi, Sanionia uncinata, Polytrichastrum alpinum, Sphagnum compactum, Ptilidium ciliare, Cetraria delisei, Cetraria islandica, Cladonia arbuscula, Cladonia bellidiflora, Cladonia coccifera, Cladonia floerkeana, Cladonia gracilis, Cladonia macrophylla, Cladonia pyxidata, Cladonia rangiferina, Cladonia squamosa, Cladonia uncialis, Cornicularia aculeata, Ochrolechia frigida, Galium saxatile, Saxifraga stellaris, Agrostis capillaris, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Nardus stricta
U9 — High montane heath and snow bed
Juncus trifidus-Racomitrium lanuginosum rush-heath
Show 47 indicator speciesEmpetrum nigrum, Kalmia procumbens, Vaccinium myrtillus, Vaccinium uliginosum, Salix herbacea, Carex bigelowii, Carex pilulifera, Juncus trifidus, Luzula spicata, Diphasiastrum alpinum, Huperzia selago, Dicranum fuscescens, Racomitrium lanuginosum, Pleurozium schreberi, Polytrichastrum alpinum, Polytrichum piliferum, Barbilophozia floerkei, Diplophyllum albicans, Ptilidium ciliare, Cetraria delisei, Cetraria islandica, Cetraria nivalis, Cladonia arbuscula, Cladonia bellidiflora, Cladonia coccifera, Cladonia crispata, Cladonia gracilis, Cladonia pyxidata, Cladonia rangiferina, Cladonia uncialis, Cornicularia aculeata, Ochrolechia frigida, Sphaerophorus globosus, Stereocaulon vesuvianum, Thamnolia vermicularis, Silene acaulis, Vaccinium vitis-idaea, Armeria maritima, Polygonum viviparum, Alchemilla alpina, Galium saxatile, Agrostis capillaris, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Nardus stricta, Nitella flexilis
U10 — High montane heath and snow bed, Lowland dry acid grassland, Upland dry heath
Carex bigelowii-Racomitrium lanuginosum moss-heath
Show 82 indicator speciesEmpetrum nigrum, Kalmia procumbens, Vaccinium myrtillus, Salix herbacea, Carex bigelowii, Carex panicea, Carex pilulifera, Juncus squarrosus, Juncus trifidus, Luzula spicata, Diphasiastrum alpinum, Huperzia selago, Selaginella selaginoides, Andreaea alpina, Aulacomnium turgidum, Pohlia nutans, Campylopus flexuosus, Dicranum fuscescens, Dicranum scoparium, Kiaeria starkei, Racomitrium fasciculare, Racomitrium heterostichum, Racomitrium lanuginosum, Hylocomium splendens, Hypnum callichroum, Hypnum cupressiforme, Hypnum hamulosum, Pleurozium schreberi, Rhytidiadelphus loreus, Sanionia uncinata, Polytrichastrum alpinum, Polytrichum juniperinum, Polytrichum longisetum, Polytrichum piliferum, Polytrichum strictum, Anastrepta orcadensis, Diplophyllum albicans, Nardia scalaris, Ptilidium ciliare, Alectoria nigricans, Cetraria islandica, Cladonia arbuscula, Cladonia cervicornis, Cladonia coccifera, Cladonia crispata, Cladonia furcata, Cladonia gracilis, Cladonia impexa, Cladonia pyxidata, Cladonia rangiferina, Cladonia squamosa, Cladonia uncialis, Cornicularia aculeata, Ochrolechia frigida, Peltigera canina, Sphaerophorus globosus, Thamnolia vermicularis, Achillea millefolium, Antennaria dioica, Gnaphalium supinum, Solidago virgaurea, Campanula rotundifolia, Succisa pratensis, Minuartia sedoides, Silene acaulis, Vaccinium vitis-idaea, Thymus praecox, Armeria maritima, Polygonum viviparum, Rumex acetosa, Alchemilla alpina, Potentilla erecta, Sibbaldia procumbens, Galium saxatile, Viola palustris, Viola riviniana, Agrostis capillaris, Agrostis vinealis, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Nardus stricta
U11 — High montane heath and snow bed, Lowland dry acid grassland, Upland dry heath
Polytrichum sexangulare-Kiaeria starkei snow-bed
Show 49 indicator speciesEmpetrum nigrum, Salix herbacea, Carex bigelowii, Juncus trifidus, Huperzia selago, Conostomum tetragonum, Pohlia drummondii, Pohlia ludwigii, Pohlia nutans, Dicranum fuscescens, Kiaeria falcata, Kiaeria starkei, Racomitrium canescens sens.lat., Racomitrium fasciculare, Racomitrium heterostichum, Racomitrium lanuginosum, Pleurozium schreberi, Rhytidiadelphus loreus, Oligotrichum hercynicum, Polytrichastrum alpinum, Polytrichastrum sexangulare, Anthelia juratzkana, Barbilophozia floerkei, Lophozia sudetica, Marsupella emarginata, Moerckia blyttii, Nardia scalaris, Pleurocladula albescens, Cetraria islandica, Cladonia bellidiflora, Cladonia pyxidata, Cladonia uncialis, Solorina crocea, Gnaphalium supinum, Cerastium cerastoides, Silene acaulis, Alchemilla alpina, Sibbaldia procumbens, Galium saxatile, Saxifraga stellaris, Viola palustris, Agrostis capillaris, Deschampsia cespitosa, Deschampsia flexuosa, Festuca vivipara, Nardus stricta, Cryptogramma crispa, Blechnum spicant, Athyrium distentifolium
U12 — High montane heath and snow bed, Upland dry heath
Salix herbacea-Racomitrium heterostichum snow-bed
Show 42 indicator speciesSalix herbacea, Carex bigelowii, Juncus trifidus, Luzula spicata, Huperzia selago, Andreaea rupestris, Conostomum tetragonum, Pohlia nutans, Dicranum scoparium, Kiaeria starkei, Racomitrium fasciculare, Racomitrium heterostichum, Racomitrium lanuginosum, Oligotrichum hercynicum, Polytrichastrum alpinum, Polytrichastrum sexangulare, Polytrichum piliferum, Barbilophozia floerkei, Diplophyllum albicans, Gymnomitrion concinnatum, Gymnomitrion corallioides, Lophozia sudetica, Marsupella brevissima, Nardia scalaris, Cetraria delisei, Cetraria islandica, Cladonia bellidiflora, Cladonia coccifera, Cladonia gracilis, Cladonia pyxidata, Cladonia uncialis, Cornicularia aculeata, Ochrolechia frigida, Gnaphalium supinum, Silene acaulis, Alchemilla alpina, Galium saxatile, Agrostis canina, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Nardus stricta
U13 — High montane heath and snow bed, Upland dry heath
Deschampsia cespitosa-Galium saxatile grassland
Show 69 indicator speciesVaccinium myrtillus, Salix herbacea, Carex bigelowii, Carex pilulifera, Luzula multiflora, Luzula sylvatica, Diphasiastrum alpinum, Huperzia selago, Selaginella selaginoides, Pohlia nutans, Kiaeria starkei, Racomitrium lanuginosum, Hylocomium splendens, Hypnum callichroum, Hypnum cupressiforme, Plagiothecium undulatum, Pleurozium schreberi, Rhytidiadelphus loreus, Rhytidiadelphus squarrosus, Rhytidiadelphus triquetrus, Sanionia uncinata, Polytrichastrum alpinum, Polytrichum commune, Sphagnum capillifolium, Sphagnum russowii, Anastrepta orcadensis, Barbilophozia floerkei, Barbilophozia lycopodioides, Nardia scalaris, Ptilidium ciliare, Cetraria islandica, Cladonia gracilis, Peltigera canina, Achillea millefolium, Gnaphalium supinum, Saussurea alpina, Campanula rotundifolia, Cerastium alpinum, Cerastium fontanum, Minuartia sedoides, Silene acaulis, Vaccinium vitis-idaea, Thymus praecox, Euphrasia frigida, Oxalis acetosella, Armeria maritima, Polygonum viviparum, Rumex acetosa, Ranunculus acris, Alchemilla alpina, Alchemilla filicaulis, Alchemilla glabra, Potentilla erecta, Sibbaldia procumbens, Galium saxatile, Saxifraga hypnoides, Saxifraga stellaris, Viola palustris, Viola riviniana, Agrostis canina, Agrostis capillaris, Anthoxanthum odoratum, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Nardus stricta, Blechnum spicant, Dryopteris dilatata
U14 — High montane heath and snow bed, Upland dry heath
Alchemilla alpina-Sibbaldia procumbens dwarf-herb community
Show 76 indicator speciesVaccinium myrtillus, Salix herbacea, Carex bigelowii, Carex pilulifera, Juncus trifidus, Luzula multiflora, Luzula spicata, Diphasiastrum alpinum, Huperzia selago, Selaginella selaginoides, Andreaea alpina, Pohlia nutans, Dicranum scoparium, Racomitrium aquaticum, Racomitrium canescens sens.lat., Racomitrium fasciculare, Racomitrium heterostichum, Racomitrium lanuginosum, Ctenidium molluscum, Hylocomium splendens, Hypnum callichroum, Pleurozium schreberi, Rhytidiadelphus loreus, Rhytidiadelphus squarrosus, Rhytidiadelphus triquetrus, Sanionia uncinata, Oligotrichum hercynicum, Pogonatum urnigerum, Polytrichastrum alpinum, Polytrichum piliferum, Barbilophozia floerkei, Diplophyllum albicans, Lophozia sudetica, Nardia scalaris, Ptilidium ciliare, Cetraria islandica, Cladonia arbuscula, Cladonia bellidiflora, Cladonia pyxidata, Achillea millefolium, Gnaphalium supinum, Scorzoneroides autumnalis, Campanula rotundifolia, Cerastium alpinum, Cerastium fontanum, Minuartia sedoides, Sagina saginoides, Silene acaulis, Thymus praecox, Euphrasia officinalis, Armeria maritima, Polygonum viviparum, Rumex acetosa, Ranunculus acris, Thalictrum alpinum, Trollius europaeus, Alchemilla alpina, Alchemilla filicaulis, Alchemilla glabra, Potentilla erecta, Sibbaldia procumbens, Galium saxatile, Saxifraga hypnoides, Saxifraga oppositifolia, Saxifraga stellaris, Viola palustris, Agrostis canina, Agrostis capillaris, Anthoxanthum odoratum, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Nardus stricta, Blechnum spicant, Botrychium lunaria