| 词条 | Yr Arddu (South) |
| 释义 |
| name = Yr Arddu | photo = Yr_Arddu.jpg | photo_caption = Yr Arddu from the Rhyd Road | elevation_m = 388 | prominence_m = | parent_peak = Moelwyn Mawr | listing = | language = Welsh | location = Gwynedd, Wales | range = Snowdonia | coordinates = {{coord|52.9958|-4.0479|type:mountain_region:GB|display=inline,title}} | grid_ref_UK = SH627462 | topo = OS Landranger 124, Explorer OL17 | easiest_route = Hike }} Yr Arddu is a 388m high mountain peak in Snowdonia, Wales (Not to be confused with the 589 metre Yr Arddu (North) to the east of Snowdon). It lies approximately 2.5 km south east of the village of Beddgelert and just over 1 km from the rather more famous mountain Cnicht. It is a rugged hill with widespread rock outcrops and cliffs. A small lake, Llyn yr Arddu, is located on the flanks of the mountain. The craggy nature of the summit is due to the presence of lavas and tuffs (volcanic ash deposits) dating from the Ordovician period when Snowdonia was characterised by numerous volcanic eruptions; Yr Arddu is a particularly good location to see the record of Ordovician volcanism. The Yr Arddu Tuffs may be the earliest eruptive phase of the Lower Rhyolitic Tuff Formation.[1] The whole mountain is a site of special scientific interest designated by the Countryside Council for Wales[2]. Yr Arddu is commonly approached by a footpath leaving the minor road that links Nantmor to Nant Gwynant but the final 0.5 km has no marked paths. See Also{{cite web | url=http://www.streetmap.co.uk/map.srf?x=262575&y=346284&z=120&sv=262575,346284&st=4&ar=y&mapp=map.srf&searchp=ids.srf&dn=615&ax=262575&ay=346284&lm=0 | title=Location on Streemap}}References1. ^{{cite journal |author=M. F. Howells, S. D. G. Campbell, A. J. Reedman & S. P. Tunnicliff |year=1987 |title=A fissure-controlled acidic volcanic centre (Ordovician) at Yr Arddu, North Wales |journal=Geological Journal |volume=22 |issue=2 |pages=133–149 |doi=10.1002/gj.3350220206}} {{Gwynedd-geo-stub}}2. ^{{cite web | url=http://naturalresources.wales/media/642535/SSSI_0415_Map0012a48.pdf | title=SSSI Boundary Map}} 4 : Beddgelert|Llanfrothen|Mountains and hills of Gwynedd|Mountains and hills of Snowdonia |
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