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16-649: The Allakh-Yun arises at an elevation of around 1,070 metres (3,510 ft) as the outflow from the mountain lake Amparyndzha, in the south-eastern Verkhoyansk Range . It flows generally in a south-westerly direction through a narrow valley along the Yudoma-Maya Highlands , to the east of the Sette-Daban range. The river cuts through the Ulakhan-Bom Ridge, before flowing into the Aldan by

32-601: Is quite deep snow cover for most of the year. The mountain range is home to an alpine tundra , supporting various species of mosses and lichens. Some sparsely-wooded forests of mainly larch and dwarf Siberian pine are found on smooth slopes. Yuri Alexandrovich Bilibin Yuri Alexandrovich Bilibin ( Russian : Ю́рий Алекса́ндрович Били́бин ; 19 May 1901 in Rostov – 4 May 1952 in Leningrad )

48-537: Is very sparsely settled, with the few settlements that do exist on the river, such as Allakh-Yun , Zvyodochka and Solnechny , having originated as gold-mining centres in the 1930s. With the economic crisis arising after the breakup of the Soviet Union and subsequent cessation of mining activities, the area's population dropped from over 8,000 in 1989 to around 1,500 in 2010. The 300-kilometre (190 mi) long unsealed road connecting Eldikan with Yugoryonok on

64-726: The Orulgan Range , display a typical Alpine relief. There are coal , silver , lead , tin , and zinc deposits in the mountains. Rising from the shores of the Buor-Khaya Gulf in the north, it runs southwards spanning roughly 1000 km (600 mi.) across Yakutia , east of the Central Yakutian Lowland , and west of the Chersky Range , reaching the Lena Plateau to the south and

80-464: The Orulgan Range . The Ulakhan-Bom , highest point 1,600 metres (5,200 ft), Sette-Daban , highest point 2,012 metres (6,601 ft), and Skalisty Range (Rocky Range), highest point 2,017 metres (6,617 ft), are located at the southern end and were also considered separate ranges in classical geographic works. The two ranges were surveyed in 1934 by geologist Yuri Bilibin (1901–1952) together with mining engineer Evgeny Bobin (1897–1941) in

96-856: The Volkovo Cemetery in the Literary Bridges section. Bilibino town and Bilibino District in Chukotka Autonomous Okrug , as well as the mineral Bilibinskite , were named in his honor. He also was awarded the Medal "For Valiant Labour in the Great Patriotic War 1941–1945" , as well as the Stalin Prize in the I degree, for his exploration and discovery of new gold deposits in the Far East of

112-586: The Yudoma River crosses the Allakh-Yun on a concrete bridge north of Solnechny. This bridge has been repeatedly destroyed or damaged by floods, most recently in 2008. Verkhoyansk Range The Verkhoyansk Range ( Russian : Верхоянский хребет , Verhojanskiy Hrebet ; Yakut : Үөһээ Дьааҥы сис хайата , Üöhee Caaŋı sis xayata ) is a mountain range in the Sakha Republic , Russia near

128-612: The Yudoma-Maya Highlands to the southeast. It forms a vast arc between the Lena and Aldan rivers to the west and the Yana River to the east. The Verkhoyansk Range has a higher southeastern prolongation than the Suntar-Khayata Range , which is occasionally considered as a separate range system. Thus the highest point of the range in a restricted geographical sense is an unnamed 2,409-metre (7,904 ft)-high peak in

144-616: The Orulgan, the system of the range comprises a number of subranges, as well as a plateau, including the following: The Verkhoyansk mountain system separates the basins of the Lena River to the west and southwest and the Omoloy and Yana to the east and northeast. It is deeply cut by riverine intermontane basins . Many right tributaries of the Lena flow westwards, having their sources in

160-633: The course of an expedition sent by the government of the Soviet Union. After conducting the first topographic survey of the area, Bilibin established that the Skalisty and Sette-Daban mountain chains belong to the Verkhoyansk Mountain System. Bilibin and Bobin also explored for the first time the Yudoma-Maya Highlands , located to the southeast of the Ulakhan-Bom/Sette-Daban/Skalisty ranges. Besides

176-576: The last unmapped areas of continental USSR , the Sette-Daban and the Yudoma-Maya and Aldan highlands, in the course of an expedition sent by the Soviet government in 1934. Bilibin wrote more than 60 scientific papers, including the authoritative Fundamentals of placer geology (Основы геологии россыпей, 1938). He died in Leningrad in 1952 from an intracerebral hemorrhage and was buried at

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192-656: The range in its southern part, flowing from its source in the Suntar Khayata. The valley of the Aldan is located to the south, where the river makes a wide bend. From the eastern slopes flow the rivers Dulgalakh and Sartang , which form river Yana further north, as well as its tributaries Bytantay , Nelgese , Derbeke , and Baky , among others. Rivers in the mountainous areas are usually frozen between September and May. The world's lowest temperatures for inhabited places have been recorded in this region, and there

208-607: The range, including the Kyundyudey , Undyulyung , Begidyan , Sobolokh-Mayan , Menkere , Dzhardzhan , Uel-Siktyakh , Kuranakh-Siktyakh , Byosyuke , Tikyan , Dyanyshka , Lyapiske , Belyanka , Munni , Kele , Tukulan , Tumara , Nuora , and Baray , among others. To the northeast flow left tributaries of the Omoloy such as the Kuranakh-Yuryakh , Arga-Yuryakh , Bukhuruk , and Sietinde . The Tompo cuts across

224-688: The settlement of Verkhoyansk , well-known for its frigid climate . It is part of the East Siberian Mountains . The range lies just west of the boundary of the Eurasian and the North American tectonic plates . The mountains were formed by folding , and represent an anticline . The Verkhoyansk Range was covered by glaciers during the Last Glacial Period and the mountains in the northern section, such as

240-466: The southern end of the Kyllakh Range , at an elevation of 146 metres (479 ft), approximately 20 kilometres (12 mi) from the settlement of Eldikan . At its mouth, the Allakh-Yun is about 150 metres (490 ft) wide and 2 metres (7 ft) deep. The Allakh-Yun freezes over from mid-October until late May. The river is navigable on its lower and middle sections. The surrounding area

256-602: Was a Soviet geologist. Between 1919-1921 he served in the Red Army . In 1926 he graduated from the Leningrad Mining Institute . He later became a member of the Soviet Academy of Sciences and in 1946 was awarded the Stalin Prize for his contribution in the discovery of gold deposits in northeast Siberia . Together with mining engineer Evgeny Bobin (1897—1941), Bilibin surveyed and charted

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