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157:. At over half a mile long, it is thought to be the largest landslide in the United Kingdom. The name "castles" comes from the debris from the landslide, which has produced several gritstone mounds that tower over the valley and appear from the distance to look like castles. Viewed from a distance the largest of these, the "Tower", resembles a full-scale
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The exact cause of the landslide is still debated. One theory is that the soft shales below are too weak to support the weight of the heavy sandstone above and collapse under it, or that, because water can run through gritstone but not shale rock, trapped water may have "lubricated" the rock to the
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deposits. Further turbidite flows eroded into previous ones, resulting in the type of deposit seen at Alport Castle. As the delta prograded (the mouth of the river moved further out to sea), the deposits become coarser. In the Peak
District this coarse material is the
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that flowed into the sea. The deposits were sorted such that the finest material travelled the furthest and was deposited in the deep ocean as black shales. Further deposits accumulated on the slopes of the oceans and collapsed, resulting in
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steepened the sides of the valley, leaving unstable slopes that failed after the glacier melted, causing the landslide. However, immediately upstream is a normal river valley so any glacier would have been small.
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The rock faces and cliffs are unstable and unsuitable for climbing and scrambling; however, the site is accessible along some well-trodden
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Alport
Castles has been selected for geological conservation as one of the most significant landslips in Britain.
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point where one layer slid over another, causing the landslide. A further possibility is that a valley
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This article is about landslip feature in North
Derbyshire. For other uses, see
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393:. Geological Conservation Review Series. Peterborough: JNCC. p. 20.
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below the site. This is the farm where the suffragette
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The site is also of interest for birdwatchers, as both
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that caps high points, protecting them from erosion.
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167:The Alport Castles are on the eastern side of the
195:300 million years ago, the area now known as the
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251:The remote Alport Castles Farm lies on the
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274:One of the outcrops known as "The Tower"
50:One of the outcrops known as "The Tower"
286:Layers of rock exposed by the landslide
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248:have been known to nest on the crags.
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1000:Derbyshire Dales Narrow Gauge Railway
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237:, and is a popular site for walkers.
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424:. Peakland Heritage. Archived from
359:"Peakland Heritage: Alport Castles"
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259:was born in 1871 and brought up.
1118:Landslides in the United Kingdom
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1060:Royal Crown Derby Visitor Centre
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494:Places of Interest in Derbyshire
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330:. National Trust. Archived from
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279:
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67:
60:
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387:Mass Movements in Great Britain
328:"Peak District: Alport Castles"
985:Cromford and High Peak Railway
609:Derby Museum & Art Gallery
414:
377:
1:
1040:Millennium Walkway, New Mills
604:Buxton Museum and Art Gallery
306:
568:Chesterfield's Crooked Spire
556:Churches and religious sites
190:
7:
1035:Midland Railway – Butterley
1015:Ecclesbourne Valley Railway
702:Longdendale Reservoir Chain
508:Ardotalia (Melandra Castle)
151:Peak District National Park
10:
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582:Museums and cultural sites
501:Castles and military sites
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788:Nine Ladies Stone Circle
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179:; they lie north of the
1045:National Tramway Museum
652:Buxton Pavilion Gardens
619:Pickford's House Museum
20:Alport (disambiguation)
980:Barrow Hill Roundhouse
973:Transport and industry
81:Location in Derbyshire
1099:Derbyshire portal
939:Sutton Scarsdale Hall
766:Prehistoric landmarks
384:Cooper, R.G. (2007).
1010:Derwent Valley Mills
459:at Wikimedia Commons
235:public rights of way
171:valley, part of the
742:Shining Cliff Woods
697:Ladybower Reservoir
185:Ladybower Reservoir
105: /
1025:Leawood Pump House
1020:High Peak Junction
757:Treak Cliff Cavern
682:Heights of Abraham
677:Foremark Reservoir
630:and outdoor spaces
599:Buxton Opera House
365:on 29 October 2007
183:and north-west of
109:53.4209°N 1.7884°W
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1005:Derwent Reservoir
959:Willersley Castle
778:Hob Hurst's House
707:Longdendale Trail
628:Natural landmarks
455:Media related to
400:978 1 86107 481 2
246:peregrine falcons
139:
138:
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1096:
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949:Thornbridge Hall
929:St Helen's House
839:Chatsworth House
809:Barlborough Hall
747:Speedwell Cavern
727:Ogston Reservoir
687:Howden Reservoir
657:Carsington Water
647:Blue John Cavern
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528:Melbourne Castle
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428:on 25 April 2016
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361:. Archived from
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159:motte and bailey
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954:Tissington Hall
874:Hartington Hall
854:Elvaston Castle
814:Bradbourne Hall
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712:Longshaw Estate
667:Derby Arboretum
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589:Buxton Crescent
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513:Bolsover Castle
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894:Melbourne Hall
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884:Kedleston Hall
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445:External links
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422:"Suffragettes"
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173:National Trust
143:Alport Castles
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1123:Peak District
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869:Hardwick Hall
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90:Coordinates:
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934:Sudbury Hall
924:Riber Castle
909:Parwich Hall
899:Norbury Hall
819:Bradley Hall
752:Thorpe Cloud
692:Kinder Scout
636:
594:Buxton Baths
430:. Retrieved
426:the original
416:
404:. Retrieved
386:
379:
367:. Retrieved
363:the original
336:. Retrieved
332:the original
253:River Alport
250:
239:
232:
224:
215:
194:
169:River Alport
166:
142:
140:
15:
1030:Magpie Mine
864:Haddon Hall
829:Calke Abbey
824:Bretby Hall
732:Peak Cavern
722:Monsal Dale
642:Black Rocks
201:river delta
112: /
1112:Categories
783:Minninglow
432:9 February
406:9 February
307:References
181:Snake Pass
155:Derbyshire
129:Derbyshire
97:53°25′15″N
1055:Peak Rail
1050:Odin Mine
879:Ilam Park
859:Eyam Hall
773:Arbor Low
211:gritstone
206:turbidite
191:Formation
100:1°47′18″W
37:Landslide
1074:See also
672:Dovedale
147:landslip
125:Location
717:Mam Tor
219:glacier
133:England
397:
242:ravens
162:castle
145:are a
391:(PDF)
369:3 May
338:3 May
229:Today
434:2018
408:2018
395:ISBN
371:2013
340:2013
244:and
141:The
135:, UK
175:'s
153:in
1114::
348:^
315:^
187:.
164:.
131:,
486:e
479:t
472:v
436:.
410:.
373:.
342:.
22:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
