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  2. Glossary of climbing terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_climbing_terms

    A A-grade Also aid climbing grade. The technical difficulty grading system for aid climbing (both for "original" and an adapted version for "new wave"), which goes: A0, A1, A2, A3, A4, A5 and up to A6 (for "new wave"). See C-grade. Abalakov thread Abalakov thread Also V-thread. A type of anchor used in abseiling especially in winter and in ice climbing. ABD Also assisted braking device. A term ...

  3. Mountain formation - Wikipedia

    en.wikipedia.org/wiki/Mountain_formation

    Mountain formation occurs due to a variety of geological processes associated with large-scale movements of the Earth's crust (tectonic plates). [1] Folding , faulting , volcanic activity , igneous intrusion and metamorphism can all be parts of the orogenic process of mountain building. [ 2 ]

  4. Old School RuneScape - Wikipedia

    en.wikipedia.org/wiki/Old_School_RuneScape

    Old School RuneScape is a massively multiplayer online role-playing game (MMORPG), developed and published by Jagex.The game was released on 16 February 2013. When Old School RuneScape launched, it began as an August 2007 version of the game RuneScape, which was highly popular prior to the launch of RuneScape 3.

  5. Tunnel Mountain Formation - Wikipedia

    en.wikipedia.org/wiki/Tunnel_Mountain_Formation

    The Tunnel Mountain Formation is present in the front ranges of the Canadian Rockies of western Alberta, and reaches a maximum thickness of about 200 metres (600 ft). It unconformably overlies the Etherington Formation or the Todhunter Formation of the Mississippian Rundle Group, and is conformably overlain by the Late Pennsylvanian Kananaskis Formation.

  6. Saddle (landform) - Wikipedia

    en.wikipedia.org/wiki/Saddle_(landform)

    A 'saddle point' in mathematics derives its name from the fact that the prototypical example in two dimensions is a surface that curves up in one direction, and curves down in a different direction, resembling a riding saddle or a mountain pass between two peaks forming a landform saddle.

  7. Rock of Gibraltar - Wikipedia

    en.wikipedia.org/wiki/Rock_of_Gibraltar

    The Dockyard Shale Formation is an undescribed variegated shale of unknown age that lies buried beneath the Gibraltar's dockyard and coastal protection structures. [ 6 ] Although these geological formations were deposited during the early part of the Jurassic Period some 175–200 million years ago, their current appearance is due to far more ...

  8. Col - Wikipedia

    en.wikipedia.org/wiki/Col

    A col in geomorphology is the lowest point on a mountain ridge between two peaks. [1] It may also be called a gap or pass. [1] Particularly rugged and forbidding cols in the terrain are usually referred to as notches. They are generally unsuitable as mountain passes, but are occasionally crossed by mule tracks or climbers' routes.

  9. Glossary of geology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geology

    Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...