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Hackpen, Warren & Gramp's Hill Downs is a Site of Special Scientific Interest in Letcombe Bassett in Oxfordshire, England. Its grid reference is . It is composed of three separate sloping areas of unimproved chalk downland, representing a type of habitat now uncommon in the Berkshire Downs.〔It is in an area which was formerly in Berkshire, and is part of the area of chalk hills still known as the Berkshire Downs.〕 It was formerly notified as ''Hackpen Hill and Crowhole Bottom''. Eleven species of butterfly have been recorded, including chalkhill blue, brown argus and marbled white.〔(Natural England Citation, Hackpen, Warren & Gramp's Hill Downs )〕 The site has extensive views over rolling countryside. ''Gramp's Hill Down'' is the most easterly area, and the closest to Letcombe Bassett. The main grass is upright brome, and it has a rich variety of herbs, including yellow rattle, chalk milkwort and kidney vetch.〔 The eastern half of the central area, ''Warren Down'', is also dominated by upright brome, with herbs including bulbous butteercup and salad burnet. The main grass in the western half is meadow grass, with bare patches and rabbit damaged areas which have been colonised by plants of disturbed ground such as henbane.〔 At the western end is ''Hackpen Down'', the largest part of the site, which has a wide variety of aspects and gradients. The main grass is red fescue, and herbs include horseshoe vetch and common rockrose. A narrow strip to the east contains hawthorns and elder scrub.〔 ==Hackpen Hill bowl barrow== Hackpen Hill bowl barrow is a Bronze Age barrow a few metres north of Hackpen Down. It is approximately 21 metres in diameter and 1.4 metres high, surrounded by a quarry ditch from which material was taken to construct it, but which is now largely infilled. There is a depression at the top probably caused by an excavation by antiquarians, although no record of this survives. It is a Scheduled monument, and its grid reference is .〔(English Heritage, Monument No. 229179 )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hackpen, Warren & Gramp's Hill Downs」の詳細全文を読む スポンサード リンク
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