In geography and geology, a cliff or rock face is an area of rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually composed of rock that is resistant to weathering and erosion. The sedimentary rocks that are most likely to form cliffs include sandstone, limestone, chalk, and dolomite. Igneous rocks such as granite and basalt also often form cliffs.
An escarpment (or scarp) is a type of cliff formed by the movement of a geologic fault, a landslide, or sometimes by rock slides or falling rocks which change the differential erosion of the rock layers.
Most cliffs have some form of scree slope at their base. In arid areas or under high cliffs, they are generally exposed jumbles of fallen rock. In areas of higher moisture, a soil slope may obscure the talus. Many cliffs also feature tributary waterfalls or rock shelters. Sometimes a cliff peters out at the end of a ridge, with mushroom rocks or other types of rock columns remaining. Coastal erosion may lead to the formation of sea cliffs along a receding coastline.
The British Ordnance Survey distinguishes between around most cliffs (continuous line along the topper edge with projections down the face) and outcrops (continuous lines along lower edge).
Cliff comes from the Old English word clif of essentially the same meaning, cognate with Dutch, Low German, and Old Norse klif 'cliff'. [1] These may in turn all be from a Romance loanword into Primitive Germanic that has its origins in the Latin forms clivus / clevus ("slope" or "hillside"). [2] [3]
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Given that a cliff does not need to be exactly vertical, there can be ambiguity about whether a given slope is a cliff or not and also about how much of a certain slope to count as a cliff. For example, given a truly vertical rock wall above a very steep slope, one could count just the rock wall or the combination. Listings of cliffs are thus inherently uncertain.
Some of the largest cliffs on Earth are found underwater. For example, an 8,000 m drop over a 4,250 m span can be found at a ridge sitting inside the Kermadec Trench.
According to some sources, the highest cliff in the world, about 1,340 m high, is the east face of Great Trango in the Karakoram mountains of northern Pakistan. This uses a fairly stringent notion of cliff, as the 1,340 m figure refers to a nearly vertical headwall of two stacked pillars; adding in a very steep approach brings the total drop from the East Face precipice to the nearby Dunge Glacier to nearly 2,000 m.
The location of the world's highest sea cliffs depends also on the definition of 'cliff' that is used. Guinness World Records states it is Kalaupapa, Hawaii, [5] at 1,010 m high. Another contender is the north face of Mitre Peak, which drops 1,683 m to Milford Sound, New Zealand. [6] These are subject to a less stringent definition, as the average slope of these cliffs at Kaulapapa is about 1.7, corresponding to an angle of 60 degrees, and Mitre Peak is similar. A more vertical drop into the sea can be found at Maujit Qaqarssuasia (also known as the 'Thumbnail') which is situated in the Torssukátak fjord area at the very tip of South Greenland and drops 1,560 m near-vertically. [7]
Considering a truly vertical drop, Mount Thor on Baffin Island in Arctic Canada is often considered the highest at 1370 m (4500 ft) high in total (the top 480 m (1600 ft) is overhanging), and is said to give it the longest vertical drop on Earth at 1,250 m (4,100 ft). However, other cliffs on Baffin Island, such as Polar Sun Spire in the Sam Ford Fjord, or others in remote areas of Greenland may be higher.
The highest cliff in the solar system may be Verona Rupes, an approximately 20 km (12 mi) high fault scarp on Miranda, a moon of Uranus.
The following is an incomplete list of cliffs of the world.
Above Sea
Above Land
Several big granite faces in the Arctic region vie for the title of 'highest vertical drop on Earth', but reliable measurements are not always available. The possible contenders include (measurements are approximate):
Mount Thor, Baffin Island, Canada; 1,370 m (4,500 ft) total; top 480 m (1600 ft) is overhanging. This is commonly regarded as being the largest vertical drop on Earth [2] [ citation needed ]ot:leapyear at 1,250 m (4,100 ft).
of Baffin Island, rises 4,300 ft above the flat frozen fjord, although the lower portion of the face breaks from the vertical wall with a series of ledges and buttresses. [8]
Other notable cliffs include:
Above Sea
Above Land
Above Sea
Above Land
Submarine
Above Sea
Above Land
Cliff landforms provide unique habitat niches to a variety of plants and animals, whose preferences and needs are suited by the vertical geometry of this landform type. For example, a number of birds have decided affinities for choosing cliff locations for nesting, [21] often driven by the defensibility of these locations as well as absence of certain predators. Humans have also inhabited cliff dwellings.
The population of the rare Borderea chouardii , during 2012, existed only on two cliff habitats within western Europe. [22]
K2, at 8,611 metres (28,251 ft) above sea level, is the second-highest mountain on Earth, after Mount Everest at 8,849 metres (29,032 ft). It lies in the Karakoram range, partially in the Gilgit-Baltistan region of Pakistan-administered Kashmir and partially in the China-administered Trans-Karakoram Tract in the Taxkorgan Tajik Autonomous County of Xinjiang.
The Karakoram is a mountain range in the Kashmir region spanning the border of Pakistan, China, and India, with the northwestern extremity of the range extending to Afghanistan and Tajikistan. Most of the Karakoram mountain range falls under the jurisdiction of Gilgit-Baltistan, which is controlled by Pakistan. Its highest peak, K2, is located in Gilgit-Baltistan, Pakistan. It begins in the Wakhan Corridor (Afghanistan) in the west, encompasses the majority of Gilgit-Baltistan, Pakistan and extends into Ladakh and Aksai Chin. It is part of the larger Trans-Himalayan mountain ranges.
Chogolisa is a trapezoidal mountain located in the Karakoram range within the Gilgit-Baltistan region of Pakistan. It is situated near the Baltoro Glacier in the Concordia region, which is renowned for hosting some of the world's tallest peaks.
Terich Mir is the highest mountain of the Hindu Kush range, and the highest mountain in the world outside of the Himalayas–Karakoram range, at 7,708 meters (25,289 ft) above sea level. It is located in the Chitral District of Khyber Pakhtunkhwa, Pakistan.
The Karakoram Highway, also known as the KKH, National Highway 35, N-35, and the China–Pakistan Friendship Highway, is a 1,300 km (810 mi) national highway which extends from Hasan Abdal in the Punjab province of Pakistan to the Khunjerab Pass in Gilgit-Baltistan, where it crosses into China and becomes China National Highway 314. The highway connects the Pakistani provinces of Punjab and Khyber Pakhtunkhwa plus Gilgit-Baltistan with China's Xinjiang Uyghur Autonomous Region. The highway is a popular tourist attraction and is one of the highest paved roads in the world, passing through the Karakoram mountain range, at 36°51′00″N75°25′40″E at maximum elevation of 4,714 m (15,466 ft) near Khunjerab Pass. Due to its high elevation and the difficult conditions under which it was constructed, it is often referred to as the Eighth Wonder of the World. The highway is also a part of the Asian Highway AH4.
The Trango Towers are a family of rock towers situated in the Gilgit-Baltistan region, in the northern part of Pakistan. The Towers have some of the world's largest cliffs and offer some of the most challenging big wall climbing opportunities. Each year, climbers from around the world embark on expeditions to the Karakoram region to climb these granite faces. The Trango Towers are situated to the north of the Baltoro Glacier and are part of the Baltoro Muztagh, which is a sub-range within the Karakoram mountain range. The highest point within the group is the summit of Great Trango Tower at 6,286 m (20,623 ft), the east face of which features the world's greatest nearly vertical drop.
The Baltoro Glacier is a glacier located in the Shigar District of the Gilgit-Baltistan region in Pakistan. It stretches for 63 km (39 mi) in length. It is one of the longest glaciers outside the polar regions. It is home to some of the world’s highest mountains. It runs through the Karakoram mountain range, close to K2, which is the second highest peak in the world, reaching an elevation of 8,611 meters. Within a 20-kilometer radius, there are three more mountains with elevations exceeding 8,000 meters.
Mount Thor, officially gazetted as Thor Peak, is a mountain with an elevation of 1,675 m (5,495 ft) located in Auyuittuq National Park, on Baffin Island, Nunavut, Canada. The mountain is located 46 km (29 mi) northeast of Pangnirtung and features Earth's greatest vertical drop of 1,200 m (4,100 ft), with the cliff overhanging at an average angle of 105 degrees. Despite its remoteness, this feature makes the mountain a popular rock climbing site. Camping is allowed, with several designated campsites located throughout the length of Akshayuk Pass. For climbers looking to scale Mount Thor, there is an established campsite a few kilometres north of its base, complete with windbreaks and emergency shelters.
The Baltoro Muztagh is a subrange within the Karakoram mountain range. It spans across the Baltistan region of Gilgit-Baltistan, which is the northernmost political entity of Pakistan, and extends into Xinjiang, China. The crest of this range also serves as part of the border between Pakistan and China.
The Rakaposhi-Haramosh Mountains are a subrange of the Karakoram range. They are located in the Bagrot Valley in the Gilgit and Nagar districts of the Gilgit-Baltistan region, Pakistan.
Askole, Askoli, or Askoly is a small town located in Braldo Valley, in the Gilgit–Baltistan region of Pakistan. Askole lies in a remote region of the Karakoram mountains 3,040 meters above sea level. It is notable for being the final settlement before the wilderness of the high Karakorams begins.
Trango Glacier is a glacier in the Baltoro Muztagh range of the Karakoram in Baltistan, Gilgit-Baltistan, Pakistan.
Hainablak Glacier is a glacier near Trango Tower mountain in Baltistan, Gilgit-Baltistan, Pakistan.
Central Karakoram National Park is a national park located in Skardu district of Gilgit-Baltistan in Pakistan. It encompasses some of the world’s highest peaks and largest glaciers. Internationally renowned for mountaineering, rock climbing and trekking opportunities, it covers an area of about 10,000 sq. km and contains the greatest concentration of some of the tallest mountains on Earth. It has four peaks over 8,000 m including K2 (8611 m), Gasherbrum-I (8068 m), Gasherbrum-II (8035 m) and Broad Peak (8051 m), and sixty peaks higher than 7,000 m. The park was placed on the World Heritage Site Tentative List in 2016.
Gilgit-Baltistan is an administrative territory of Pakistan in the northern part of the country. It was given self-governing status on August 29, 2009. Gilgit-Baltistan comprises 14 districts within three divisions. The four districts of Skardu Kharmang Shigar and Ghanche are in the Baltistan Division, four districts of Gilgit Ghizer Hunza and Nagar districts which were carved out of Gilgit District are in the Gilgit Division and the third division is Diamir, comprising Chilas and Astore. The main political centres are the towns of Gilgit and Skardu.
Tourism in Gilgit-Baltistan, an administered territory of Pakistan, focuses on its access to various mountain ranges and alpine terrain. Various tourist destinations attract millions of travelers from within Pakistan. On the other hand, tourists from other countries also routinely visit GB. An estimated 1.72 million tourists visited the region in 2017 according to the Pakistan Tourism Development Corporation (PTDC). Travelers had contributed Rs.300 million to the local economy in 2017. The authorities were expecting 2.5 million tourists in 2018 which would have meant an additional Rs.450 million to the economy.
Kutiah Lungma Glacier is a glacier that stretches for approximately 12 km in length and has a width of about 3 km. It is situated within the Karakoram mountain range in the Stak Valley of District Skardu, Gilgit-Baltistan, Pakistan. This glacier is located in the Stak Valley, which is sometimes referred to as Staq, and it falls within the subdivision of Roundu in district Skardu, Gilgit-Baltistan.