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Bixslade, occasionally written Bix Slade, is a short, steep-sided, valley in the Forest of Dean, Gloucestershire. It begins on high ground at Bixhead, near Broadwell, and descends sharply to meet the Cannop Valley at Stonyhill Green. Bixslade has been quarried or mined continuously for over 500 years and has been described as ''"one of the country's finest areas of extractive industrial heritage"''.〔(The Industrial Heritage of Bixhead & Bixslade in the Forest of Dean. Page 17 )〕 Many abandoned workings are still evident in the valley and are now home to a variety of wildlife, lichens, mosses and other plant life. Three quarries and a Freemine also continue to operate, largely hidden by the picturesque woodland. == Geology == The Forest of Dean sits on a basin plateau, formed of a fractured asymmetrical syncline composed of Upper Palaeozoic rocks from the Silurian, Devonian and Carboniferous periods.〔(Gloucester Geology Trust website )〕 The rocks of the Bixslade valley consist of massive Pennant Sandstone, interbedded with shale and coal seams. Iron-ore is present in the sandstone along the northern side of the valley, giving it a distinctive pink colour (see photograph). This is unusual for the Forest of Dean, where iron-ore is normally found in limestone. Two coal seams can be accessed from Bixslade; the'' 'Yorkley Seam' ''and the'' 'Coleford High Delph'.'' Both ascend from the foot of the valley, rising with the valley floor. The Yorkley seam outcrops roughly one third of the way up, while the underlying Coleford High Delph continues towards Coleford without outcrop. 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「Bixslade」の詳細全文を読む スポンサード リンク
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