Mountain Ranges, Deserts and Landforms of Tajikistan

Geology and geological history

The geological history of the Tibetan Plateau is closely related to that of the Himalayas. The Himalayas belong to the Alpine orogeny and are among the younger mountain ranges on the planet, consisting mostly of uplifted sedimentary and metamorphic rock. Their formation is a result of a continental collision or orogeny along the convergent boundary between the Indo-Australian plate and the Eurasian plate.

India began drifting northward from Gondwana in the Upper Cretaceous, about 70 million years ago (Mya), moving at about 15 cm (6 in) per year; its collision with the Eurasian plate is most commonly dated to around 55–50 Mya, near the Paleocene–Eocene boundary, though the exact timing remains debated.

Human history

Archaic Denisovans lived on the plateau from around 200,000 to 40,000 years ago, according to a study published in Nature. Archaeological evidence suggests that the earliest human occupation of the plateau occurred between 30,000 and 40,000 years ago.

Since the plateau's earliest settlement, Tibetan culture has adapted and flourished in the western, southern, and eastern regions. The Changtang is generally too high and cold to support permanent population. The Tibetan Empire existed from the 7th century to the 9th century AD. Nomadic pastoralism, once practiced widely across Asia and Africa, has persisted among these communities on the plateau. Pastoral nomads constitute about 40% of the ethnic Tibetan population.

Description

The Tibetan Plateau is surrounded by the massive mountain ranges of high-mountain Asia. The plateau is bordered to the south by the inner Himalayan range, to the north by the Kunlun Mountains which separate it from the Tarim Basin, and to the northeast by the Qilian Mountains, which separate it from the Hexi Corridor and Gobi Desert. To the east and southeast are the Salween, Mekong, and Yangtze rivers in northwest Yunnan, western Sichuan, and southwest Qinghai. In the west, the rugged Karakoram range of northern Kashmir curves around the plateau's edge. The Indus River originates in the western Tibetan Plateau in the vicinity of Lake Manasarovar.

Geography and relation to Xinjiang

Xinjiang consists of two main geographically, historically, and ethnically distinct regions with different historical names, Dzungaria and the Tarim Basin (Altishahr), until it was merged into the Chinese Province of Xinjiang in 1884. At the time of the Qing conquest in 1759, Dzungaria was inhabited by steppe-dwelling, nomadic Mongolic Buddhist Dzungars, while the Tarim Basin (Altishahr) was inhabited by sedentary, oasis-dwelling, Turkic-speaking Uyghur Muslim peasants. Dzungaria and the Tarim Basin were each governed separately until the creation of Xinjiang province.

The Chinese called this the Tien Shan Nan Lu or Tien Shan South Road, as opposed to the Bei Lu north of the mountains. Along it runs the modern highway and railroad while the middle Tarim River is about 100 km south.

Geology

The Tarim Basin is the result of an amalgamation between an ancient microcontinent and the growing Eurasian continent during the Carboniferous to Permian periods, a process which ended in the earliest Triassic with the closure of the Palaeo-Asian Ocean. At present, deformation around the margins of the basin is resulting in the microcontinental crust being pushed under Tian Shan to the north, and Kunlun Shan to the south.

A thick succession of Paleozoic, Mesozoic and Cenozoic sedimentary rocks occupy the central parts of the basin, locally exceeding thicknesses of 15 km (9 mi). The source rocks of oil and gas tend to be mostly Permian mudstones and, less often, Ordovician strata which experienced an intense and widespread early Hercynian karstification.

History

It is speculated that the Tarim Basin may be one of the last places in Asia to have become inhabited: It is surrounded by mountains and irrigation technologies might have been necessary.

The Northern Silk Road on one route bypassed the Tarim Basin north of the Tian Shan mountains and traversed it on three oases-dependent routes: one north of the Taklamakan Desert, one south, and a middle one connecting both through the Lop Nur region.

The northern Tarim route ran from Kashgar via Aksu, Kucha, Korla, through the Iron Gate Pass, then Karasahr, Jiaohe, Turpan, Gaochang and Kumul to Anxi.

The southern Tarim route ran from Kashgar through Yarkant, Karghalik, Pishan, Khotan, Keriya, Niya, Qarqan, Qarkilik, Miran and Dunhuang to Anxi.

Geography

The three highest mountains in the Pamirs core are Ismoil Somoni Peak (known from 1932 to 1962 as Stalin Peak, and from 1962 to 1998 as Communism Peak), 7,495 m (24,590 ft); Ibn Sina Peak (still officially known as Lenin Peak in Kyrgyzstan), 7,134 m (23,406 ft); and Peak Korzhenevskaya (Russian: Пик Корженевская, Pik Korzhenevskoi), 7,105 m (23,310 ft). In the Eastern Pamirs, China's Kongur Tagh is the highest at 7,649 m (25,095 ft).

Remark: The summits of the Kongur and Muztagata Group are in some sources counted as part of the Kunlun, which would make Peak Ismoil Somoni the highest summit of the Pamir.

There are many glaciers in the Pamir Mountains, including the 77 km (48 mi) long Vanch-Yakh Glacier, the longest in the former USSR and the longest glacier outside the polar regions.

Tourism

In December 2009, the New York Times featured articles on the possibilities for tourism in the Pamir area of Tajikistan. 2013 proved to be the most successful year ever for tourism in the region and tourism development continues to be the fastest growing economic sector.

Geography and geology

The Fergana Valley is an intermountain depression in Central Asia, between the mountain systems of the Tien Shan in the north and the Alay in the south. The valley is approximately 300 kilometres (190 mi) long and up to 70 kilometres (43 mi) wide, forming an area covering 22,000 square kilometres (8,500 sq mi). Its position makes it a separate geographic zone. The valley owes its fertility to two rivers, the Naryn and the Kara Darya, which unite in the valley, near Namangan, to form the Syr Darya. Numerous other tributaries of these rivers exist in the valley including the Sokh River.

Climate

The climate of this valley is dry and continental, being mostly a cool arid climate (Köppen BWk) or a cool semi-arid climate (BSk) in less shielded areas. In March the temperature reaches 20 °C (68 °F), and then rapidly rises to 35 °C (95 °F) in June, July and August. During the five months following April precipitation is rare, but increases in frequency starting in October. Snow and frost, down to −20 °C (−4 °F), occurs in December and January.

History

Fergana, on the route to Tarim Basin from the west, remained at the boundaries of a number of classical era empires.

As early as 500 BC, the western sections of the Fergana Valley formed part of the Sogdiana region, which was ruled from further west and owed fealty to the Achaemenid Empire at the time of Darius the Great. The independent and warlike Sogdiana formed a border region insulating the Achaemenid Persians from the nomadic Scythians to the north and east. It was forcibly settled by exiled Greeks from the Anatolian coast, who had rebelled or otherwise given Persia trouble. Eventually, it had a significant Greek community. The capital of the region was known to the Greeks as Cyropolis, named after Cyrus the Great.