Lena Plateau

The Lena Plateau, also known as Prilensky Plateau[1] (Russian: Приленское плато, Prilenskoye Plato; Yakut: Өлүөнэтээҕи хаптал хайалаах сир), is one of the great plateaus of Siberia. Administratively it is mostly within the Sakha Republic (Yakutia), with a small sector in the Irkutsk Oblast, Far Eastern Federal District, Russia. The plateau is named after the Lena River, which flows across it.[2]

Lena Plateau
Prilensky Plateau
Приленское плато
View of the Sinyyaya Pillars in the plateau
Highest point
Elevation700 m (2,300 ft)
Dimensions
Length1,000 km (620 mi)
Width200 km (120 mi)
Geography
Location in the Far Eastern Federal District, Russia
CountryRussia
Federal subjectYakutia, Irkutsk Oblast
Range coordinates60°45′N 125°0′E
Parent rangeCentral Siberian Plateau
Geology
Age of rockCambrian and Ordovician
Type of rockLimestone, dolomite, sandstone

There are spectacularly eroded rock formations composed of gypsum-bearing and saline limestone, dolomite and, in some places sandstone, in different spots of the plateau. The Lena Pillars, lining the banks of river Lena in the region, are the most well-known of these features. They were declared a UNESCO World Heritage Site in 2012.[3] Other protected areas in the plateau are the Sinyyaya Pillars by river Sinyaya, and the Turuuk Khaya Rocks by the Lyutenge River.[4] The Olyokma Nature Reserve is located on the eastern side, partly within neighboring Aldan Highlands.[5]

Geography

The Lena Plateau is located in the southern Sakha Republic, between the Lower Tunguska River in the west and the Amga River in the east. It extends roughly to the north along the left bank of the Lena River for more than 1,000 kilometers (620 mi) with an average width of 200 kilometers (120 mi). The Central Siberian Plateau, is located to the northwest and the Central Yakutian Lowland to the north.[2] The average height of the Lena Plateau surface is between 450 meters (1,480 ft) and 500 meters (1,600 ft). Elevations become slightly higher towards the south of the plateau, reaching a maximum height of 700 metres (2,300 ft) at an unnamed summit. The plateau is located in a permafrost zone where the soil freezes down to hundreds of meters. The Namana, Buotama, Menda, Suola, Kenkeme, Bappagay, Kempendyay, Tatta, Tamma, Peleduy, Nyuya, Pilyuda, Sinyaya, Markha, Lungkha, Ulakhan-Botuobuya, Biryuk and Lyutenge are some of the watercourses having their source in the plateau.[6]

The Lena Plateau occupies a very large area, including parts of the districts of Mirny, Suntar, Verkhnevilyuy, Gorny, Khangalassky, Megino-Kangalassky, Lensky, Olyokmin, Amgin and Aldan in the Sakha Republic, as well as parts of Katanga and Bodaybin districts in the Irkutsk Oblast.[6]

Flora and climate

There are taiga forests made up mostly of pine and larch in the higher areas. Wetlands and meadows are common in the river valleys cutting across the plateau.[6]

The plateau is characterized by a harsh continental climate, with long cold winters and sparse amounts of snow. In winter the temperature may drop to −45 °C (−49 °F), and sometimes even down to −60 °C (−76 °F). Summers are moderately warm with temperatures reaching 15 °C (59 °F) to 17 °C (63 °F). Precipitation is between 350 millimeters (14 in) and 450 millimeters (18 in) per year. Most of the yearly precipitation falls in the summer in the form of rain.

Cliffs by the Lena and sparse forest in the winter.
Buotama River Valley.

See also

References
  1. The Thermal State of Soils in Northern Prilensky Plateau
  2. Google Earth
  3. Centre, UNESCO World Heritage. "Lena Pillars Nature Park". whc.unesco.org.
  4. Visit Yakutia
  5. "Olyokma Zapovednik (Official Site)" (in Russian). Ministry of Natural Resources and Environment (Russia). Archived from the original on 22 May 2013. Retrieved 15 November 2019.
  6. Приленское плато, Great Soviet Encyclopedia
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