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The Chains is the name given to the north-west plateau of Exmoor, Somerset, England. This plateau lies above the contour line, and includes the source of the River Barle. It lies roughly within a triangle of land between Simonsbath, Challacombe and Lynton and has few distinguishing features. The highest point is at Chains Barrow - . It is a Geological Conservation Review site,〔(【引用サイトリンク】url=http://jncc.defra.gov.uk/default.aspx?page=4174&gcr=2020 )〕 recognised as being nationally important for its south-western lowland heath communities and for transitions from ancient semi-natural woodland through upland heath to blanket mire. The Chains provides a palynological record of a mid to late Flandrian vegetation history on Exmoor. The pollen sequence in the peat is calibrated by radiocarbon dating.〔(【引用サイトリンク】 work=English Nature )〕 On the Chains above Simonsbath is a reservoir known as Pinkery Pond. It was formed by John Knight and his son in the 19th century by damming the River Barle. The pond was originally intended to be . Its purpose is unknown but close to the pond are the remains of a small canal. Long Chains Combe is the site of several standing stones which have been designated as scheduled monuments. ==References== 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「Chains (geological site)」の詳細全文を読む スポンサード リンク
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