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Peninnis Head
Peninnis Head is the southernmost point of St Mary’s, Isles of Scilly.〔Ordnance Survey: Landranger map sheet 203 ''Land's End'' ISBN 978-0-319-23148-7〕 The headland is within the Isles of Scilly Area of Outstanding Natural Beauty and part of the Heritage Coast. It is also a Geological Conservation Review site for its Quaternary geomorphology and was first designated a Site of Special Scientific Interest (SSSI) in 1971 for both its biological and geological interests.〔(【引用サイトリンク】url=http://www.sssi.naturalengland.org.uk/citation/citation_photo/1001894.pdf )〕 On the tip of the headland is a squat lighthouse built in 1911 by Trinity House as a replacement for the 17th century lighthouse on St Agnes.
The ''Gilstone'', a prominent rock off the eastern side of Peninnis Head, should not be confused with a rock of the same name in the Western Rocks.
==Geology==
The headland is composed of coarse–grained Hercynian granite which has weathered to form cairns and natural sculptures with names such as the Pulpit Rock. In places head deposits have accumulated and thin podzolic soils have formed over the granite which is ideal for the formation of waved maritime heath vegetation. Peninnis Head is a Geological Conservation Review site because of the lack of glacial features which makes it possible to compare with sites, such as on Tresco in the north of the islands, where the granite has had some contact with glacial ice.〔
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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