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Afon Crawnon : ウィキペディア英語版 | Afon Crawnon The Afon Crawnon is a river in the Brecon Beacons National Park in the county of Powys, Wales. The headwaters rise on the hills north of Trefil and flow northeast down a valley known as Dyffryn Crawnon for 7km to a confluence with the River Usk just west of Llangynidr. 〔Ordnance Survey Explorer maps OL12 & OL13 'Brecon Beacons National Park: western area & eastern area'〕 The valley is notable for being at the centre of a major green energy initiative known as The Three Green Valleys project and which involves the construction of several micro-hydro schemes. Dyffryn Crawnon is translated from Welsh to mean "Valley of the Garlic River". ==Geology== The river flows through a valley carved into the mudstones and sandstones of the Old Red Sandstone laid down during the Devonian period. 〔British Geological Survey 1:50,000 map sheet 232 'Abergavenny' & accompanying memoir〕
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「Afon Crawnon」の詳細全文を読む
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