Priddy Pools

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Priddy Pools
Site of Special Scientific Interest
Somerset UK location map.svg
Red pog.svg
Location within Somerset
Location Somerset
Grid reference ST545510
Coordinates 51°15′23″N2°39′12″W / 51.25634°N 2.65340°W / 51.25634; -2.65340 Coordinates: 51°15′23″N2°39′12″W / 51.25634°N 2.65340°W / 51.25634; -2.65340
InterestBiological and Geological
Area52.7 ha (130 acres)
Notification 1972 (1972)
Natural England website
Priddy Pools by Nick Smith Priddy pond reflective lake.jpg
Priddy Pools by Nick Smith

Priddy Pools (grid reference ST545510 ) is a 52.7-hectare (130-acre) geological Site of Special Scientific Interest at Priddy in the Mendip Hills, Somerset, notified in 1972.

Contents

The pools provided the water supply for the Priddy Mineries [1] which is now a Nature Reserve.

Biological

Great crested newt TriturusCristatus.jpg
Great crested newt

This site supports a very rich invertebrate and amphibian fauna. A wide range of seminatural habitats are present, including valley mire, open water, swamp and tall fen. These habitats have a restricted distribution in the Mendip Hills. Priddy Pools is situated in the central Mendip lead orefield and the ecology of the area bears the mark of the lead industry. The northern pool was dammed in the 1850s to provide a supply of running water for the sifting and washing of slag. Lead was processed at St Cuthbert's Works until 1908. The hydrology of the site is complex. Nutrient-poor water flows from springs in the north of the site to St Cuthbert's Swallet where it disappears before re-emerging at Wookey Hole. A valley mire has developed in the area immediately to the south of the springs. Sphagnum recurvum and Sphagnum auriculatum are the most frequent mosses, and a range of higher plants can be found. Additional interest lies in the flora that can tolerate high concentrations of lead in the soil such as spring sandwort (Minuartia verna) and the moss Ditrichum plumbicola .

Priddy Pools supports a very rich fauna. Fifteen species of dragonfly have been recorded; as well as supporting the only population of downy emerald in the Mendips, the site hosts the notable four-spotted chaser (Libellula quadrimaculata) and ruddy darter (Sympetrum sanguineum). Five British species of amphibian occur and there are good populations of great crested newt (Triturus cristatus), smooth newt (Triturus vulgaris) and palmate newt (Triturus helveticus). Three species of reptile, viviparous lizard (Lacerta vivipara), adder ( Vipera berus ), grass snake (Natrix natrix), and at least two species of fish; European perch, (Perca fluviatilis) and three-spined stickleback (Gasterosteus aculeatus) are present. Breeding birds include moorhen (Gallinula chloropus), coot (Fulica atra), mallard (Anas platyrhynchos), reed bunting (Emberiza schoeniclus) and sedge warbler (Acrocephalus schoenobaenus). Priddy Pools is an important research site. Detailed study of the algae in the northern pool was carried out in the late 1960s and early 1970s, as part of the International Biological Programme. [2]

Geological

The site contains the entrance to St Cuthbert's Swallet cave, and overlies a large part of the cave complex reached through St Cuthbert's Swallet. This cave is an integral part of the Priddy Caves system which contains over 10 miles of surveyed cave passages divided between two major systems and four minor systems, all interconnected. All the caves are sink hole systems, fed by sink holes at the ground surface, and 3 of them exceed 100 metres in depth; in all the caves the detailed disposition and form of the passages can be seen clearly to have followed marked lines of natural weakness in the rocks. St Cuthbert's Swallet was formed by the erosive action of water flowing beneath the water-table at considerable depth (so called "phreatic development"). St Cuthbert's Swallet is a classic example of a deep phreatic cave system, containing inclined bedding plane mazes at many levels, fault-guided rifts and some significant chambers. Nine successive phases of sediment deposition, stalagmite deposition and stream erosion have been recognised in St Cuthbert's Swallet, providing an exceptional record of environmental change through the warm and cold phases of the Ice Age. [2]

Use in literature

In his 1995 book "Our Game", John le Carré uses "Priddy Pool" as the site for the drowning of one of his characters. [3]

Related Research Articles

Wookey Hole Caves Series of limestone caverns in Somerset county, England

Wookey Hole Caves are a series of limestone caverns, a show cave and tourist attraction in the village of Wookey Hole on the southern edge of the Mendip Hills near Wells in Somerset, England. The River Axe flows through the cave. It is a Site of Special Scientific Interest (SSSI) for both biological and geological reasons. Wookey Hole cave is a "solutional cave", one that is formed by a process of weathering in which the natural acid in groundwater dissolves the rocks. Some water originates as rain that flows into streams on impervious rocks on the plateau before sinking at the limestone boundary into cave systems such as Swildon's Hole, Eastwater Cavern and St Cuthbert's Swallet; the rest is rain that percolates directly through the limestone. The temperature in the caves is a constant 11 °C (52 °F).

Mendip Hills Range of limestone hills to the south of Bristol and Bath in Somerset, England

The Mendip Hills is a range of limestone hills to the south of Bristol and Bath in Somerset, England. Running from Weston-super-Mare and the Bristol Channel in the west to the Frome valley in the east, the hills overlook the Somerset Levels to the south and the Chew Valley and other tributaries of the Avon to the north. The hills give their name to the local government district of Mendip, which administers most of the area. The higher, western part of the hills, covering 198 km2 (76 sq mi) has been designated an Area of Outstanding Natural Beauty (AONB), which gives it a level of protection comparable to a national park.

Swildons Hole Cave in Somerset, England

Swildon's Hole is an extensive cave in Priddy, Somerset. At 9,144 metres (30,000 ft) in length, it is the longest cave on the Mendip Hills. It has been found to be connected to Priddy Green Sink and forms part of the Priddy Caves Site of Special Scientific Interest (SSSI).

River Axe (Bristol Channel) River in Somerset, England

The River Axe is a river in South West England. The river is formed by water entering swallets in the limestone and rises from the ground at Wookey Hole Caves in the Mendip Hills in Somerset, and runs through a V-shaped valley. The geology of the area is limestone and the water reaches Wookey Hole in a series of underground channels that have eroded through the soluble limestone. The river mouth is in Weston Bay on the Bristol Channel.

Burrington Combe Limestone gorge in north Somerset, England

Burrington Combe is a Carboniferous Limestone gorge near the village of Burrington, on the north side of the Mendip Hills Area of Outstanding Natural Beauty, in North Somerset, England.

Wurt Pit and Devils Punchbowl Geological Site of Special Scientific Interest in Somerset, England

Wurt Pit and Devil's Punchbowl is a 0.2 hectare geological Site of Special Scientific Interest between East Harptree and the Priddy Circles in the Mendip Hills, Somerset, notified in 1987.

Priddy Human settlement in England

Priddy is a village in Somerset, England in the Mendip Hills, close to East Harptree and 4 miles (6 km) north-west of Wells. It is in the local government district of Mendip.

Brimble Pit and Cross Swallet Basins is a 154.3 hectare geological Site of Special Scientific Interest between Wookey Hole and Priddy in the Mendip Hills, Somerset, notified in 1987.

Priddy Caves is an Area: 67.6 hectare geological Site of Special Scientific Interest at Priddy in the Mendip Hills, Somerset, notified in 1965.

Priddy Mineries Nature reserve in Somerset, England

Priddy Mineries is a nature reserve previously run by the Somerset Wildlife Trust. It is in the village of Priddy, on the Mendip Hills in Somerset.

St. Dunstan's Well Catchment is a Site of Special Scientific Interest, covering 39.8 hectares near Stoke St Michael in the Mendip Hills, Somerset, England. The site was notified in 1967. It is of both geological and biological significance.

Cheddar Complex Site of Special Scientific Interest in Somerset, England

The Cheddar Complex is a 441.3 hectare biological Site of Special Scientific Interest near Cheddar around the Cheddar Gorge and north east to Charterhouse in the Mendip Hills, Somerset, England, notified in 1952.

Thrupe Lane Swallet is a 0.5 hectares geological Site of Special Scientific Interest in Somerset, notified in 1992. It is also a Geological Conservation Review site.

Caves of the Mendip Hills

The caves of the Mendip Hills are formed by the particular geology of the Mendip Hills: large areas of limestone worn away by water makes it a national centre for caving. The hills conceal the largest underground river system in Britain.

St Cuthberts Swallet Cave in the Mendip Hills, Somerset, England

St Cuthbert's Swallet is the second longest, and most complex, cave on the Mendip Hills, in Somerset, England. It forms a major part of the Priddy Caves system and water entering this swallet re-emerges at Wookey Hole. St Cuthbert's Swallet is part of, and lies underneath, the Priddy Pools Site of Special Scientific Interest.

Stoke Lane Slocker Limestone cave in Somerset, England

Stoke Lane Slocker is a cave near Stoke St Michael, in the Carboniferous Limestone of the Mendip Hills, in the English county of Somerset.

Sidcot Swallet is a cave near Burrington Combe, in the Carboniferous Limestone of the Mendip Hills, in Somerset, England.

Rods Pot Cave in Somerset, England

Rod's Pot is a limestone cave above Burrington Combe in the Mendip Hills, in Somerset, England.

Newt Salamander in the subfamily Pleurodelinae

A newt is a salamander in the subfamily Pleurodelinae. The terrestrial juvenile phase is called an eft. Unlike other members of the family Salamandridae, newts are semiaquatic, alternating between aquatic and terrestrial habitats. Not all aquatic salamanders are considered newts, however. More than 100 known species of newts are found in North America, Europe, North Africa and Asia. Newts metamorphose through three distinct developmental life stages: aquatic larva, terrestrial juvenile (eft), and adult. Adult newts have lizard-like bodies and return to the water every year to breed, otherwise living in humid, cover-rich land habitats.

Hunter's Hole is a cave in the Mendip Hills in Somerset, England. It is behind a pub, known as the Hunters Lodge Inn just outside Priddy where visitors can park. It is accessed via a permanent ladder, about 100m behind the pub in a small dip between some trees.

References

  1. Reid, Robert Douglas (1979). Some buildings of Mendip. The Mendip Society. ISBN   0-905459-16-4.
  2. 1 2 "Priddy Pools" (PDF). English Nature. Retrieved 17 July 2006.
  3. "Priddy Pools in John Le Carre "Our Game"". Amazon. Retrieved 17 July 2006.