In geography and geology, a cliff 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 formed by rock that is resistant to weathering and erosion. Sedimentary rocks 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 or landslides, or maybe by rock slides by falling rock which biologically changes the differential erosion of rock layers of selectioning or deforming hardness.
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 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'.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").
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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.
The highest very steep non-vertical cliffs in the world are Nanga Parbat's Rupal Face and Gyala Peri's southeast face, which both rise approximately 4,600 m, or 15,000 ft, above their base. According to other 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,at 1,010 m high. Another contender is the north face of Mitre Peak, which drops 1,683 m to Milford Sound, New Zealand. 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.
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.
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 [ 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.
Other notable cliffs include:
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,often driven by the defensibility of these locations as well as absence of certain predators.
The population of the rare Borderea chouardii , during 2012, existed only on two cliff habitats within western Europe.
K2, at 8,611 metres (28,251 ft) above sea level, is the second-highest mountain on Earth, after Mount Everest. It lies in the Karakoram range, in part in the Gilgit-Baltistan region of Pakistan-administered Kashmir and in part in a China-administered territory of the Kashmir region included in the Taxkorgan Tajik Autonomous County of Xinjiang.
The Karakoram is a mountain range spanning the borders of China, India, and with the northwest extremity of the range extending to Afghanistan and Tajikistan; its highest 15 mountains are all based in India. It begins in the Wakhan Corridor (Afghanistan) in the west, encompasses the majority of Gilgit-Baltistan, and extends into Ladakh and Aksai Chin. It is the second highest mountain range in the world and part of the complex of ranges including the Pamir Mountains, the Hindu Kush and the Himalayan Mountains. The Karakoram has eighteen summits over 7,500 m (24,600 ft) height, with four of them exceeding 8,000 m (26,000 ft): K2, the second highest peak in the world at 8,611 m (28,251 ft), Gasherbrum I, Broad Peak and Gasherbrum II.
Masherbrum is located in the Ghanche District, Gilgit Baltistan, Pakistan. At 7,821 metres (25,659 ft) it is the 22nd highest mountain in the world and the 9th highest in Pakistan. It was the first mapped peak in the Karakoram mountain range, hence the designation "K1".
Rakaposhi is a mountain in the Karakoram mountain range in the Gilgit-Baltistan territory of Pakistan. Its front side is situated in the Bagrote valley, Nagar valley and danyor, approximately 100 km (62 mi) north of the city of Gilgit. Rakaposhi is also known as Dumani. It is ranked 27th highest in the world.
Chogolisa is a trapezoidal mountain in the Karakoram range in the Gilgit-Baltistan region of Pakistan. It lies near the Baltoro Glacier in the Concordia region, which is home to some of the highest peaks of the world. Chogolisa has several peaks: the highest, on the SW face, rises to 7,668 metres (25,157 ft); the second highest at 7,654 metres on the NE side is the one named Bride Peak by Martin Conway in 1892.
Baltistan, also known as Baltiyul or Little Tibet, is a mountainous region in Gilgit-Baltistan, Pakistan-administered Kashmir. It is located near the Karakoram mountains just south of K2, and borders Gilgit to the west, China's Xinjiang to the north, Ladakh to the southeast, and the Kashmir Valley to the southwest. Its average altitude is over 3,350 metres (10,990 ft).
The Karakoram 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, atat maximum elevation of 4,714 m (15,466 ft) near Khunjerab Pass. Due to its high elevation and the difficult conditions in 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.
Skardu is a city located in Gilgit−Baltistan, Pakistan, and serves as the capital of the Skardu District. Skardu is situated at an elevation of nearly 2,500 metres in the Skardu Valley, at the confluence of the Indus and Shigar Rivers. The city is an important gateway to the eight-thousanders of the nearby Karakoram mountain range. The Indus River running through the region separates the Karakoram from the Himalayas.
The Trango Towers are a family of rock towers situated in Gilgit-Baltistan, in the north of Pakistan. The Towers offer some of the largest cliffs and most challenging rock climbing in the world, and every year a number of expeditions from all corners of the globe visit Karakoram to climb the difficult granite. They are located north of Baltoro Glacier, and are part of the Baltoro Muztagh, a sub-range of the Karakoram range. The highest point in 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, at 63 km (39 mi) in length, is one of the longest glaciers outside the polar regions. It is located in the Shigar district Gilgit-Baltistan region of Pakistan. It runs through part of the Karakoram mountain range. The Baltoro Muztagh lies to the south and east of the glacier, while the Masherbrum Mountains lie to the south. At 8,611 m (28,251 ft), K2 is the highest mountain in the region, and three other Eight thousanders within 20 km. Siachen Glacier is separated from the Baltoro glacier by the Conway Saddle.
The Baltoro Muztagh is a subrange of the Karakoram mountain range, in Baltistan region of the Gilgit-Baltistan, northernmost political entity of Pakistan; and in Xinjiang, China. The crest of the range forms part of the Pakistan-China border.
The Rakaposhi-Haramosh Mountains are a subrange of the Karakoram range. They are located in the Bagrot Valley Gilgit and Nagar Districts, in the Gilgit-Baltistan of Pakistan. They are bordered by Barpu and the Chogo Lungma Glaciers in the north, by the Shigar River in the east, by the Gilgit and Indus Rivers in the south, and by the Hunza River in the west.
Askole, Askoli, or Askoly is a small town located in Shigar Valley, in the Gilgit–Baltistan region of Pakistan. Askole is located in a remote region of the Karakoram mountains 3040 meters above sea level. It is notable for being the final settlement before one enters the wilderness of the high Karakorams.
Trango Glacier is a glacier in the Baltoro Muztagh range of the Karakoram in Baltistan, Gilgit-Baltistan, Pakistan. It flows from north to south on the west side of the Trango Towers and joins the Baltoro Glacier. Trango towers has been declared 2nd almost vertical slope in the world and has a height of about 6,200 metres (20,300 ft).
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 high 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 has been under Pakistan administration since 1947 and was given self-governing status on August 29, 2009. Gilgit-Baltistan comprises 10 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.
Safar Hai Shart is a travelogue television show on-air on Express News. The show was hosted by Waqar Ahmed Malik and Mukkaram Kaleem. Safar Hai Shart was an exclusive travelogue produced by Waqar Ahmed Malik, completed on nothing but motorbikes. Two guys on bikes explored the wonders of the Karakoram Highway in Pakistan. The Karakoram Highway (KKH) is the highest paved international road in the world and often known as 9th wonder of the world. The travels started from Rawalpindi and end on Khunjerab Pass, the highest paved international border crossing in the world and the highest point on the Karakoram Highway. The show comprises the adventure, thrill and depiction of native culture of Kohistan, Gilgit and Hunza. Safar Hai Shart also showed Nanga Parbat and the related expedition stories specially of Hermann Buhl, Reinhold Messner in 6th and 7th episodes. This program was produced with the cooperation of Frontier Works Organisation and World Wide Fund for Nature.
Tourism in Gilgit-Baltistan, an administrative unit of Pakistan, focuses on the mountains. Gilgit-Baltistan borders Pakistan's Khyber Pakhtunkhwa Province to the west, a small portion of the Wakhan Corridor of Afghanistan to the north, Xinjiang, China to the northeast, the Indian territory Jammu and Kashmir and Ladakh to the southeast, and the Pakistani-administered state of Azad Kashmir to the south.