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Ebbor Gorge
Ebbor Gorge is a limestone gorge in Somerset, England, designated and notified in 1952 as a biological Site of Special Scientific Interest in the Mendip Hills. It was donated to the National Trust in 1967 and is now managed by Natural England as a National Nature Reserve.
The gorge was cut into the Clifton Down Limestone, an example of Carboniferous Limestone, by water. The floor of the gorge is impermeable Millstone Grit and Lower Coal Measures. The rare mineral mendipite has also been found. The site was occupied by humans in the Neolithic Era and their tools and flint arrow heads have been discovered, along with pottery from the Bronze Age. There are also fossils of small mammals from the Late Devensian. The nature reserve provides a habitat for a variety of flora and fauna, including flowers, butterflies and bats.
==Geology==
Ebbor Gorge lies on the southwest-facing slope of the Mendip Hills and consists of a steep-sided ravine cut into 350-million-year-old Carboniferous Limestone of the Dinantian. The gorge was cut into Clifton Down Limestone by meltwater in the Pleistocene Epoch.〔(【引用サイトリンク】url=http://www.bgs.ac.uk/mendips/localities/wookey.html )〕 The rocks of the area lie above a thrust fault formed during the Variscan orogeny. Millstone Grit and Lower Coal Measures form an impermeable floor to this valley. An example of the rare mineral mendipite was found at the head of the gorge.
A stream issuing to the west of the site runs down the tributary valley of Hope Wood before joining the main gorge. The original watercourse which may have cut the gorge into the limestone became diverted underground and now emerges at Wookey Hole Caves to form the River Axe.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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