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The southern slopes of the Mendip Hills largely follow the flanks of an anticline, a fold in the rock that is convex upwards and has its oldest beds at its core.
On the Mendips the crest of the anticline is truncated by erosion, forming a plateau.
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. 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 waters of the river are used in a handmade paper mill, the oldest extant in Britain, which began operations circa 1610.
The low, constant temperature of the caves means that they can be used for maturing Cheddar cheese.
The temperature in the caves is a constant 11 °C (52 °F).
The caves have been used by humans for around 45,000 years, demonstrated by the discovery of tools from the Palaeolithic period, along with fossilised animal remains.
The total length of passages in this area is about 820 metres (2,690 ft).High level passages here lead to a former resurgence, now blocked, some 45 metres (148 ft) above the current resurgence.An artificial tunnel 180 metres (590 ft) leading off from the third chamber allows show cave visitors to cross the seventh and eighth chambers on bridges, and skirt around the ninth chamber on a walkway, before exiting near the resurgence.Evidence of Stone and Iron Age occupation continued into Roman Britain.A corn-grinding mill operated on the resurgent waters of the River Axe as early as the Domesday survey of 1086.