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Hornchurch Cutting is an 0.8-hectare geological Site of Special Scientific Interest in Hornchurch in the London Borough of Havering. It is at the southern edge of the Anglian ice sheet 450,000 years ago, the most extreme ice age during the Pleistocence ice ages of the last 2.58 million years. (Technically, the most southerly point reached by an ice sheet during the Quaternary was ''The Dell'', a few metres south of St Andrew's Church.)〔(【引用サイトリンク】publisher=The Essex Field Club )〕 It is the type site for ''Hornchurch Till'', boulder clay laid down by the ice sheet in the Ingrebourne Valley.〔(【引用サイトリンク】 publisher=The Essex Field Club )〕 The site was discovered by geologist T. V. Holmes during construction of the Romford to Upminster railway line in 1892. He found a five-metre thickness of boulder clay overlaid by sand and gravel. An excavation in 1983 revealed extensive Jurassic fossils and rocks that had been carried from the Midlands by the ice sheet.〔 The site is very important for establishing the glacial stratigraphy of southern Britain.〔(Natural England, Hornchurch Cutting citation )〕 It featured briefly in the Channel 4 TV series ''Birth of Britain'' with Tony Robinson in 2011.〔(Network Rail team help uncover ‘Birth of Britain’, 2011 )〕〔(Channel 4, ''Birth of Britain, Episode 2, Ice'', 2011 )〕 It is between Woodhall Crescent to the north and St Andrews Park and Maywin Drive to the south.〔(【引用サイトリンク】publisher= Natural England )〕 ==See also== *List of Sites of Special Scientific Interest in Greater London 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「Hornchurch Cutting」の詳細全文を読む スポンサード リンク
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