|Thrupe Lane Swallet|
|Cave survey||Geological Conservation Review|
|Registry||Mendip Cave Registry|
|Site of Special Scientific Interest|
Thrupe Lane Swallet (grid reference 0.5 hectares (1.2 acres) geological Site of Special Scientific Interest in Somerset, notified in 1992. It is also a Geological Conservation Review site.) is a
The name Thrupe Lane comes from the nearby hamlet of Thrupe, which in Anglo-Saxon meant dairy farm.
The swallet is a small, single pothole cave system that is dominated by a series of deep (117 metres (384 ft)) and mainly vertical passages, which follow fault lines, natural joints in the rock and mineral veins. It shows a form of cave development not seen elsewhere in the Mendips and contains the tallest vertical shaft in any known cave on the Mendip Hills, Atlas Pot, which is 60 metres (197 ft) deep. The stream that flows through the cave is one of those that feeds St Andrew's Wells in the grounds of the Bishop's Palace in Wells.
Thrupe Lane Swallet was first entered in 1974 following digging by three caving groups. The entry shaft has been blasted open to ensure a stable entrance.
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).
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.
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).
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 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.
Banwell Ochre Caves are a 12.46-hectare geological Site of Special Scientific Interest near the village of Banwell, North Somerset, notified in 1983.
Banwell Caves are a 1.7-hectare geological and biological Site of Special Scientific Interest near the village of Banwell, North Somerset, England notified in 1963.
Lamb Leer is a 14.59 hectare geological Site of Special Scientific Interest between East Harptree and Priddy in the Mendip Hills, Somerset, notified in 1983. The cavern is a fragment of a very ancient major cave system which now contains one of the largest chambers in the Mendip Hills.
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 Pools is a 52.7-hectare (130-acre) geological Site of Special Scientific Interest at Priddy in the Mendip Hills, Somerset, notified in 1972.
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.
Eastwater Cavern is a cave near Priddy in the limestone of the Mendip Hills, in Somerset, England. It is also known as Eastwater Swallet. It was first excavated in April 1902 by a team led by Herbert E. Balch composed of paid labourers and volunteers from the Wells Natural History Society. Progress was initially slow, but by February 1903 Balch and Willcox had discovered substantial passage, following the streamway down to the bottom of the cave. Dolphin Pot was dug in 1940 by the Wessex Cave Club, with Primrose Pot following in 1950. West End series was the most recent significant discovery, in 1983.
GB Cave is a cave between Charterhouse and Shipham in the limestone of the Mendip Hills, in 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.
Shatter Cave is a cave in Fairy Cave Quarry, near Stoke St Michael in the limestone of the Mendip Hills, in Somerset, England. It falls within the St. Dunstan's Well Catchment Site of Special Scientific Interest.
Stoke Lane Slocker is a cave near Stoke St Michael, in the Carboniferous Limestone of the Mendip Hills, in the English county of Somerset.
Upper Flood Swallet which was originally known as Blackmoor Flood Swallet, is an exceptionally well-decorated cave near Charterhouse, in the carboniferous limestone of the Mendip Hills, in Somerset, England. The cave is part of the Cheddar Complex SSSI.
Rod's Pot is a limestone cave above Burrington Combe in the Mendip Hills, in Somerset, England.
Attborough Swallet is a cave in Chewton Mendip in Somerset, England.