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When three or more of these cirques converge on a central point, they create a pyramid-shaped peak with steep walls. These horns are a common shape for mountain tops in highly glaciated areas. The number of faces of a horn depends on the number of cirques involved in the formation of the peak: three
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The peak of a glacial horn will often outlast the arĂȘtes on its flanks. As the rock around it erodes, the horn gains in prominence. Eventually, a glacial horn will have near vertical faces on all sides. In the
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s). Cirque glaciers have rotational sliding that abrades the floor of the basin more than walls and that causes the bowl shape to form. As cirques are formed by glaciation in an alpine environment, the
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144:
and mass wasting beneath the ice surface. It is widely held that a common cause for headwall steepening and extension headward is the
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and shattering can be seen here by those exploring the crevasses. A cirque is exposed when the glacier that created it recedes.
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735:(2nd ed.). Upper Saddle River, NJ: Prentice Hall. pp. 334â336.
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diverging from a central point. Pyramidal peaks are often examples of
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to four is most common. Horns with more than four faces include the
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that occur between the moving ice and the headwall.
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759:"Illustrated Glossary of Alpine Glacial Landforms"
140:become more steep and defined. This occurs due to
168:. A peak with four symmetrical faces is called a
48:in extreme cases, is an angular, sharply pointed
1439:
547:in Glacier National Park, Montana, United States
490:in Glacier National Park, Montana, United States
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683:. New York: St. Martin's Press. p. 193.
671:
136:and ridges between parallel glaciers called
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79:Cross-section of cirque erosion over time
16:Angular, sharply pointed mountainous peak
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36:, a classic example of a pyramidal peak.
27:
662:
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681:Glacial and Periglacial Geomorphology
116:(sometimes called âcorriesâ - from
13:
14:
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750:
703:"Glossary of Glacier Terminology"
1425:
1405:Template:Periglacial environment
733:Surface Processes and Landforms
724:
695:
1:
655:
650:Pyramid Peak (disambiguation)
807:
731:Easterbrook, Don J. (1999).
70:
52:peak which results from the
7:
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176:, a mountain in the Alps).
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634:, Pirin Mountain, Bulgaria
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1453:Glacial erosion landforms
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337:Grand Teton National Park
757:Lemke, Karen A. (2010).
223:HuascarĂĄn National Park
205:HuascarĂĄn National Park
455:Mount Aspiring/Tititea
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229:
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127:
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1343:Giant current ripples
406:Glacier National Park
235:
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92:Glacier National Park
86:
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44:, sometimes called a
31:
21:Peak (disambiguation)
707:US Geological Survey
574:Store SkagastĂžlstind
19:For other uses, see
1280:Moraine-dammed lake
1107:Subglacial eruption
1112:Subglacial volcano
1095:Volcanic relations
677:King, Cuchlaine A.
673:Embleton, Clifford
281:Crowsnest Mountain
245:
230:
212:
103:
81:
38:
1413:
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1381:
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899:Accumulation zone
765:on 13 August 2012
645:Glacial landforms
545:Reynolds Mountain
494:Nevado Las Agujas
468:Mount Assiniboine
416:The Kitzsteinhorn
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1300:Terminal moraine
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868:Piedmont glacier
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761:. Archived from
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472:British Columbia
272:Greater Caucasus
186:KitzbĂŒheler Horn
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59:due to multiple
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1152:Cirque stairway
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519:, United States
507:Nevado PirĂĄmide
484:, United States
412:, United States
264:in Ancash, Peru
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118:Scottish Gaelic
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751:External links
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742:978-0138609580
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478:Mount Thielsen
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429:The Matterhorn
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311:County Donegal
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236:Muratov peak,
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125:(a bowl) - or
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42:pyramidal peak
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1270:Erratic block
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1040:Overdeepening
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1015:Basal sliding
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894:Ablation zone
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402:Kinnerly Peak
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345:United States
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88:Kinnerly Peak
85:
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1258:Depositional
1248:Zungenbecken
1246:
1177:Glacial lake
1172:Glacial horn
1171:
1086:Mass balance
1074:Measurements
1010:Accumulation
934:Glacier head
929:Glacier cave
873:Rock glacier
767:. Retrieved
763:the original
732:
725:Bibliography
710:. Retrieved
697:
680:
488:Mount Wilbur
178:
169:
158:
104:
46:glacial horn
45:
41:
39:
25:
1363:Outwash fan
1358:Kettle hole
1242:Valley step
1222:Trough lake
1202:Ribbon lake
1162:Finger lake
904:Bergschrund
600:The Pyramid
555:Uttarakhand
463:New Zealand
437:Switzerland
385:Khan Tengri
333:Grand Teton
262:Artesonraju
219:Artesonraju
172:(after the
150:bergschrund
142:freeze/thaw
1442:Categories
1390:Glaciology
1373:Urstromtal
1353:Kame delta
1305:Till plain
1102:Jökulhlaup
1060:Starvation
939:Ice divide
853:Ice stream
769:12 October
712:12 October
656:References
615:, Scotland
604:Antarctica
570:, Scotland
564:Stob Dearg
513:Pilot Peak
448:Mountain,
442:Momin Dvor
393:Kyrgyzstan
389:Kazakhstan
369:Mountain,
268:Belalakaya
240:Mountain,
174:Matterhorn
170:Matterhorn
34:Matterhorn
1448:Mountains
1432:Mountains
1135:Erosional
1127:Landforms
998:Processes
979:Randkluft
974:Penitente
919:Dirt cone
848:Ice shelf
843:Ice sheet
838:Ice field
623:Snowdonia
609:The Storr
595:Australia
540:Greenland
536:Pyramiden
380:Greenland
363:Kamenitsa
324:Patagonia
162:Weissmies
148:known as
146:crevasses
98:state of
71:Formation
1395:Category
1333:Diluvium
1328:Alpentor
1237:U-valley
1081:Ice core
1050:Plucking
1005:Ablation
989:Terminus
914:Crevasse
909:Blue ice
809:Glaciers
689:68-20348
679:(1968).
639:See also
591:Victoria
587:The Horn
568:Glen Coe
551:Shivling
523:Puy Mary
498:Los RĂos
474:, Canada
450:Bulgaria
420:Salzburg
371:Bulgaria
358:Pakistan
320:Fitz Roy
302:Scotland
249:Alpamayo
242:Bulgaria
201:Alpamayo
192:Examples
164:and the
154:Plucking
134:headwall
106:Glaciers
65:nunataks
61:glaciers
50:mountain
1275:Moraine
1265:Drumlin
1192:Nunatak
1055:Retreat
1020:Calving
964:Moraine
949:Icefall
887:Anatomy
858:Ledoyom
833:Ice cap
619:Snowdon
517:Wyoming
509:in Peru
424:Austria
410:Montana
341:Wyoming
315:Ireland
307:Errigal
294:Cuillin
285:Alberta
114:cirques
112:called
100:Montana
94:in the
57:erosion
1418:Portal
1368:Sandur
1212:Suncup
1197:P-form
1147:Cirque
1030:Motion
969:Moulin
828:Cirque
823:Aufeis
739:
687:
632:Vihren
582:Norway
531:France
527:Cantal
482:Oregon
289:Canada
276:Russia
253:Ancash
138:arĂȘtes
110:basins
54:cirque
1338:Esker
1167:Fjord
1142:ArĂȘte
1065:Surge
1025:Creep
984:SĂ©rac
816:Types
627:Wales
559:India
502:Chile
459:Otago
446:Pirin
433:Italy
397:China
376:Ketil
367:Pirin
354:China
238:Pirin
166:Mönch
122:coire
1400:List
1348:Kame
1217:Tarn
1117:Tuya
924:Firn
771:2012
737:ISBN
714:2012
685:LCCN
613:Skye
435:and
395:and
356:and
298:Skye
257:Peru
227:Peru
209:Peru
182:Alps
96:U.S.
32:The
621:in
611:in
602:in
589:in
576:in
566:in
553:in
538:in
525:in
515:in
496:in
480:in
470:in
457:in
431:in
418:in
404:in
387:in
378:in
352:in
335:in
322:in
309:in
296:in
283:in
251:in
221:in
203:in
188:).
128:cwm
90:in
1444::
705:.
675:;
664:^
625:,
593:,
580:,
557:,
529:,
500:,
461:,
444:,
422:,
408:,
391:,
365:,
350:K2
343:,
339:,
326:,
313:,
300:,
287:,
274:,
270:,
255:,
225:,
207:,
67:.
40:A
1420::
801:e
794:t
787:v
773:.
745:.
716:.
691:.
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
