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St. Dunstan's Well Catchment : ウィキペディア英語版 | St. Dunstan's Well Catchment
St. Dunstan's Well Catchment () is a Site of Special Scientific Interest, covering near Stoke St Michael in the Mendip Hills, Somerset, notified in 1967. It is of both geological and biological significance. Formerly known as Stoke St Michael Slocker, it contains nine SSSI units consisting of rock and calcareous grassland.〔(【引用サイトリンク】url=http://www.sssi.naturalengland.org.uk/special/sssi/unitlist.cfm?sssi_id=1000377 )〕 == Geological ==
St Dunstan's Well Catchment is an important and well-known cave system which includes a series of spectacularly-decorated caves which in total extend to about 4 miles of mapped passage. The caves at Fairy Cave Quarry were formed mainly by the erosive action of water flowing beneath the water-table at considerable pressure (so called 'phreatic' development), but as the water table has fallen many of the caves now lie well above it and the system now contains a variety of cave formations (stalagmites, stalactites and calcite curtains) which in their extent and preservation are amongst the best in Britain. Shatter Cave and Withyhill Cave are generally considered to be amongst the finest decorated caves in Britain in terms of their sheer abundance of pure white and translucent calcite deposits.
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