Chersky Range

The Chersky Range (Хребет Черского, Черскэй хайалара) is a chain of mountains in northeastern Siberia between the Yana and Indigirka Rivers. Administratively, the area of the range belongs to the Sakha Republic, although a small section in the east is within Magadan Oblast. The highest peak in the range is the 3003 m-tall Peak Pobeda, part of the Ulakhan-Chistay Range. The range also includes important places of traditional Yakut culture, such as Ynnakh Mountain (Mat'-Gora) and kigilyakh rock formations.

The Moma Natural Park is a protected area  located in the southern zone of the range.

History
At some time between 1633 and 1642, Poznik Ivanov ascended a tributary of the lower Lena, crossed the Verkhoyansk Range to the upper Yana, and then crossed the Chersky Range to the Indigirka. The range was sighted in 1926 by Sergei Obruchev (Vladimir Obruchev's son) and named by the Russian Geographical Society after the Lithuanian explorer and geographer Ivan Chersky (or Jan Czerski).

Geography


The geographic boundaries of the mountain system are the Yana–Oymyakon Highlands in the southwest, the Upper Kolyma Highlands in the southeast, and the Momo-Selennyakh Depression in the northeast.

Subranges
The system of the Chersky Range comprises a number of subranges running generally from northwest to southeast, including the following:

Between the Yana and Indigirka rivers: In the upper Kolyma river basin: Between the Chibagalakh and Adycha rivers Between the Indigirka and the Nera rivers: Northeastern outliers
 * Burkat Range, highest point 1150 m
 * Khadaranya Range, highest point 2185 m
 * Ymiysky Range, highest point 1048 m
 * Kisilyakh Range, highest point 1548 m, by the confluence of the Adycha and the Yana
 * Tas-Khayakhtakh, highest point 2356 m
 * Kurundya Range, highest point 1919 m
 * Dogdo Range, highest point 2272 m
 * Chemalgin Range, highest point 2547 m
 * Yana-Oymyakon Highlands
 * Elgi Plateau (Эльгинское плоскогорье), highest point 1590 m
 * Oymyakon Plateau, highest point 1400 m
 * Yana Plateau, highest point 1770 m
 * Tirekhtyakh Range and Nelgesin Range, between the Adycha and Sartang rivers
 * Ulakhan-Chistay, highest point 3003 m, near the southern end
 * Okhandya Range, highest point 2337 m, the highest point of Magadan Oblast.
 * Cherge Range, highest point 2332 m
 * Angachak Range, highest point 2293 m
 * Arga-Tas, highest point 2400 m
 * Chibagalakh Range, highest point 2449 m
 * Onyol Range (Онёлский хребет), highest point 2328 m
 * Borong Range, highest point 2681 m (west of the Charky)
 * Nendelgin Range, highest point 1777 m (east of the Adycha)
 * Porozhny Range, highest point 2551 m
 * Silyap Range, highest point Mount Chyon (Гора Чён) 2690 m
 * Tas-Kystabyt, highest point 2341 m
 * Khalkan Range, highest point 1615 m, a southern prolongation of Tas-Kystabyt

In some works, a few roughly-parallel ranges located off the main system to the northeast, such as the Kyun-Tas Range (highest point 1242 m), the Selennyakh Range (highest point highest point Saltag-Tas (2021 m), and the adjacent Moma Range (highest point 2533 m), with the Moma-Selennyakh Depression running along their western side, are included in the Chersky mountain system.

Other ranges of the system include the Irgichin Range, Inyalin Range, Volchan Range, Silen Range, and Polyarny Range, among others.

Hydrography
The Chersky System includes three main river basins:


 * Yana River, covering the western and northwestern parts of the mountain system. It includes rivers Oldzho and Adycha with its tributaries Tuostakh and Charky.
 * Indigirka River, covering the northeastern, central, and southwestern parts of the system, with rivers Selennyakh, Moma, and Nera, among others.
 * Kolyma River, covering the eastern, southeastern, and southern parts of the system, with rivers Zyryanka, Rassokha, Omulyovka, Yasachnaya, Taskan, Debin, and Byoryolyokh, among others.

Some of the higher ranges with alpine relief have glaciers. There are roughly 350 glaciers in the system, with a total area of 156.2 km2. There are also small lakes in the swampy valleys of some rivers, as well as lakes of glacial origin, such as Emanda and Tabanda.

Tectonics
The range lies on the boundary between the Eurasian and North American tectonic plates.

The precise nature of the boundary between the North American and Eurasian tectonic plates in the area of the Chersky Range is still not fully understood and is the subject of ongoing research. By the 1980s, the Chersky Range was considered mostly a zone of continental rifting where the crust was spreading apart. However, the current view is that the Chersky Range is mostly an active suture zone, a continental convergent plate boundary, where compression is occurring as the two plates press against each other. There is thought to be a point in the Chersky Range where the extensional forces coming from the north change to the compressional forces noted throughout most of the range. The Chersky Range is also thought to include a geologic triple junction where the Ulakhan Fault intersects the suture zone. Whatever the exact nature of the regional tectonics, the Chersky Range is seismically active. It connects in the north with the landward extension of the Laptev Sea Rift, itself a continental extension of the Mid-Arctic Gakkel Ridge.

Climate
The Chersky mountains, along with the neighboring Verkhoyansk Range, have a moderating effect on the climate of Siberia. The ridges obstruct west-moving air flows, decreasing the amount of snowfall in the plains to the west.