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iceway
::''This page is about the geomorphological feature. For other uses of the term see Nordic skating or Csilla (Star Wars planet).''
An iceway is a linear channel eroded through bedrock by the passage of glacial ice. The term was coined by geographer Ronald Kay Gresswell in a paper in 1964 in relation to the origins of the Dee and Mersey estuaries on the boundary of northwest England and northeast Wales. Gresswell identified several such sub-parallel features running in a northwest to southeast direction from Liverpool Bay through Merseyside into Cheshire. The Dee estuary and its landward continuation south of Chester as far as Farndon along with the Mersey estuary are the two largest iceways discerned in this region. Further iceways were identified underlying the lower Gowy valley and the Alt-Ditton depression east of Liverpool. Each of these have also been referred to as tunnel valleys.〔R K Gresswell, 1964 Origins of the Dee and Mersey Estuaries〕
==References==
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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