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Hart Side (''the hill side frequented by harts'') is a subsidiary top on one of the east ridges of Stybarrow Dodd, which is a mountain (or fell) in the English Lake District, west of Ullswater on the main Helvellyn ridge in the Eastern Fells. With a height of 2,480 feet (756 m) Hart Side rises above the col separating it from Green Side by 75 feet (23 m). Some guide-book writers have treated Hart Side as a distinct fell, and have devoted a separate chapter to it. The same writers have treated the lower Watermillock Common as part of (or associated with) the fell. Other writers have simply focussed on routes to and between the many individual tops here and throughout Lakeland. Hart Side and Green Side are the two ends of a ridge which is composed of andesite rock, a sequence of lava flows from ancient volcanoes. A lead vein in the Green Side end of the ridge was exploited by the most successful lead mine in the Lake District until it closed in 1962. ==Topography== The east ridge of Stybarrow Dodd falls about 262 feet (80 m) to a broad col from which the ground rises again. From this point the combined Hart Side and Green Side ridge has a smooth, rounded, grassy top and winds for some 1½ miles (2.5 km) to the north east. After rising 98 feet (30 m) to White Stones, the summit of Green Side (2,608 ft/795 m), it loses 203 feet (62 m) of height before rising again from a broad, gentle col, but regains only 75 feet (23 m) to the summit of Hart Side (2,608ft/756 m). At this point the ridge turns abruptly to the south of east and after losing roughly 66 feet (20 m) again it rises to a broad, rounded, unnamed grassy swelling with a height of about 2,428 feet (740 m). A north-east shoulder of this swelling ends with steeper gradients on all sides and a scattering of broken crags ahead. This shoulder was named Birkett Fell in 1963, but it has just 6½ feet (2 m) prominence〔(【引用サイトリンク】url=http://www.hills-database.co.uk/downloads.html )〕 above the ridge it terminates. This ridge of Stybarrow Dodd continues to the east as Watermillock Common after a further drop of over 656 feet (200 m).〔Ordnance Survey 1:25,000 Explorer map〕 To the north and west of the Hart Side and Green Side ridge, and to the east of Birkett Fell, grassy slopes drop into Deepdale, with an outcrop of rock just beneath the Hart Side summit, called Hart Crag, and the broken crags beneath Birkett Fell. This Deepdale should not be confused with the valley of the same name near Patterdale. These sides of the ridge are drained by Aira Beck into Ullswater. Much steeper crags line the south of Hart Side and the east of Green Side. This is Glencoyne Head, where a corrie glacier formed during the final phase of the last ice age and created these steep cliffs. These slopes drain into Glencoyne and then to Ullswater. To complete the picture, the south side of Green Side also falls steeply and over rocky crags in places into the valley of Stick’s Gill (East), which also drains into Ullswater via the Glenridding Beck.〔 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「Hart Side」の詳細全文を読む スポンサード リンク
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