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Mountain Terminology Guide

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Mountain Terminology Guide

Mountain Terminology Guide

01

May

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By Subodh Choudhary

Mountain Terminology Guide – Learn Key Trekking Terms

Knowledge of correct mountain terminology is very important for a mountaineer. Uniformity is required in climbing terms so that climbers from different places can understand each other and maintain a common standard.

1.Summit:

Highest point top of the mountain.

Summit
Summit

 

2. Ridge:

 The highest natural linear feature connecting two mountain tops.

3. Spur:

A small descending ridge coming out from the main ridge.

Spur
Spur

 

4. Re-entrant:

A terrain feature formed by two parallel spurs with low ground in between them. The area of low ground itself is the re-entrant, and it is defined by the spurs surrounding it. Re-entrants are similar to valleys on a smaller scale, however while valleys are by nature parallel to a ridgeline, a reentrant is perpendicular to the main ridge.

5. Range:

Series of mountains joined together.

6. Massif:

 A compact portion of a mountain range, containing one or more summits.

Massif

Massif

7. Valley: 

Wide depression between two mountains.

8. Arête:

 A sharp ridge of rock.

9. Doon:

A very wide valley. 

10. Gorge:

Narrow deep alley with steep sides.

Gorge

Gorge

 

11 Plateau:

 Flat plain ground on top of a mountain.

12. Meadow: 

Open, grassy plain ground on slopes of mountain.

13. Pass/LA:

Generally, the lowest point connecting two valleys and is usually used to cross from one to the other.

14. Col:

 A pass which requires technical equipment or knowledge to cross.

15. Knoll:

 Small, round hill.

 Knoll
 Knoll

 

16. Tower:

A rock projection that is flat on top.

17. Pinnacle:

A rock projection that is tapering at the top.

18. Alp:

 Grassland below the snow line.

19. Tree Line:

The tree line is the edge of the habitat at which trees are capable of growing

Tree Line
Tree Line 

 

20. Glacier:

A large, perennial accumulation of ice, snow, rock and sediment originating on land and moving down slope under the influence of its own weight and gravity; a dynamic river of ice.

21. Accumulation:

 The addition of ice and snow into a glacier system. This occurs through variety of processes, including precipitation, firnification, and wind transportation of snow into a glacier basin from an adjacent area.

22. Snow Line:

The Climatic Snow Line is the boundary between a snow-covered and snow-froe surface. The actual snow line may adjust seasonally, and be either significantly higher in elevation, or lower. The Permanent Snow Line is the level above which snow will lie all year

23. Névé (Nei Vei):

 Nevé is a young, granular type of snow which has partially melted, refrozen and compacted, yet precedes the formation of ice. Névé that survives a full season of ablation turns into firm, which is both older and slightly denser. Firn eventually becomes glacial ice the longlived, compacted ice that glaciers are composed of

24. Firn:

 An intermediate stage in the transformation of snow to glacier ice. Snow becomes Firn when it has been compressed so that no pore space remains berween flakes or crystals, a process that takes less than a year.

25. Crust:

 Top hard layer on snow.

26. Bergschrund:

It is a type of crevasse, a gap between the mountain and the start of the glacier

Bergschrund

Bergschrund

 

27. Raindkluft:

 The depression between glacier and adjacent snow/ rock face.

28. Cwm:

 A rounded, glaciated valley, also known as a corrie or cirque

29. Cornice:

 Overhanging slab of snow over a ridge, formed by wind blowing from the windward side to leeward side of a mountain.

Cornice
Cornice

 

30. Moraine:

A moraine is debris left behind by a moving glacier. This debris is usually soil and rock. Just as rivers carry along all sorts of debris and silt, that eventually builds up to form deltas, glaciers transport all sorts of sand and rocks, that build up to form moraines

31. Snow Plume:

 Snow that gets blown by wind from a peak and looks like clouds.

Snow Plume
Snow Plume

 

 

32 .Snow Field:

 A large flat ground covered with a thick layer of snow.

33. Crevasse:

 Big cracks on glaciers tapering at the bottom. Maybe horizontal, vertical, or diagonal, and open or closed.

34. Snow Bridge:

 A bridge of snow over which a crevasse can be crossed

Snow Bridge
Snow Bridge

 

35. Hanging Glacier:

 A body of ice or neve that breaks off abruptly at the edge of a precipice or steep slope

36. Ice Serac:

 Vertical blocks or columns of ice.

37. Ice Cliff:

 A very steep, vertical, or overhanging face of ice. Also called the Precipice

38. Ice Fall:

 Part of a glacier, where the ice flows over a bed with a very steep gradient, typically at a higher rate than both above and below. As a result, the surface is fractured and heavily crevassed. In a river system, tia would be a waterfall

39. Icicle:

 A hanging, apering mass of ice formed by the freezing of dripping water

Icicle

Icicle

 

40. Moulin/Glacier Mill:

A narrow, tubular chute or crevasse through which water enters a glacier from the surface. Occasionally, the lower end of a moulin may be exposed in the face of a glacier or at the edge of a stagnant block of ice.

41. Glacial Table:

 A rock that is balanced on a pedestal of ice, and elevated above the surface of a glacier. The rock protects the pedestal of ice from melting by insulating it from the sun.

Glacial Table

Glacial Table

 

42. Glacial Stream:

 A channelized accumulation of liquid water on (supraglacial), in (englacial), or under (subglacial) a glacier, moving under the influence of gravity.

43. Glacial Pool:

 Any pond of water on the top of a glacier formed by melting of snow or ice

44. Tarn:

High altitude mountain lake.

Tarn
Tarn

 

45. Ice Cave:

A natural cave or tunnel in ice, especially one formed in a glacier by water streams

46. Ablation:

The loss of ice and snow from a glacier system. This occurs through a variety of processes including melting and runoff, sublimation, evaporation, calving, and wind transportation of snow out of a glacier basin.

47. Snout:

 Terminus of a glacier, where the glacier ends and water stream emerges. Ablation point of a glacier.

48. Calving:

 The process by which pieces of ice break away from the terminus of a glacier, which end in a body of water, or from the edge of a floating ice shelf, which end in the ocean. Once they enter the water, the pieces are called icebergs.

Calving

Calving

 

49.. Avalanche:

 Huge mass of unstable snow, ice or debris, that starts moving down slope gathering momentum from a particular point due to various factors.

50. Avalanche Wind:

A wind caused by an avalanche.

51. Convex Slope:

 A terrain feature that is curved or rounded like the exterior of a sphere or circle. i.e. goes from less steep to more steep. Convex slopes generally tend to be less safe than concave slopes, but concave slopes can also be prone to avalanches.

52. White Out:

Cloud conditions leading to extreme poor visibility, in which the horizon is indistinguishable from the featureless, white sky. In extreme forms, white-outs can disorient a person to a point where he/she cannot figure out any directions, and thus obviously pose an immediate danger to mountaineers.

53. Snow Blizzard:

 Storm with snow fall blowing at excessive speeds, with restricted visibility and extreme cold conditions.

Snow Blizzard
Snow Blizzard

 

54. Snow Blindness:

Painful eye condition caused due to over exposure to ultra violet (UV) light. It causes temporary blindness as the affected person is not able to open his/her eyes. Can be prevented by wearing UV protecting sun glasses during day time.

55. Verglas:

A slippery thin coating of frozen ice on rock.

Verglas

Verglas

 

56. Acclimatization:

Is the process in which an individual adjusts to a gradual change im environment/altitude.

57. Bucket Step:

While ascending on snow using zig zag pattern, a broader step made by climbers

58. Balling Up:

Ball of snow that forms on the base of the crampons while walking on snow. This can be dangerous for the climber and cause a fall.

59. Dry Tooling:

Using tools like crampons and ice axes on mixed surface with rock and ice/ snow.

Dry Tooling
Dry Tooling

 

60. Base Camp:

The lowest and the largest fixed camp on a major ascent in mountains. It acts as the logistics base at a suitable height, where climbers can fall back for rest or in case of bad weather.

61. Bivouac/Bivvy:

Temporary shelter to stay, a camp or the act of camping. 

Bivouac/Bivvy
Bivouac/Bivvy

 

62. Benightment:

Compelled or emergency night halt, camping without adequate shelter without a pre plan.

63. Snow Cave/Igloo:

A snow cave is a shelter constructed in snow by certain animals in the wild, human mountain climbers, winter recreational enthusiasts, and winter survivalists. It is particularly effective at providing protection from wind as well as low temperatures. A properly made snow cave can be 0 °C or warmer inside, even when outside temperatures are -40 °C.

64. Cairn:

A distinctive pile of stones placed to mark a route, often above the treeline.

Cairn

Cairn