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Baydzharakh (; Yakut language: Бадьараах, Baçaraakh) is a term based in the Yakut language, referring to a roughly cone-shaped natural rock formation. They are usually composed of siltstone, silty peat or loam.
In the first phase of the ice melting process baydzharakhs have a pillar-like shape. When the ice mass in the surrounding rocks is high, they swell and form rounded depressions known as alas (Алаас) in Yakut. These depressions are usually between to in depth, but exceptionally may be deep. Baydzharakhs come often combined with alas depressions.Baydzharakh - Russian Geodictionary (VSEFEI)S.V. Kalesnik, ed. Encyclopedic dictionary of geographical terms. Moscow. 1968
Baydzharakh formations are found in different places across the East Siberian Lowland, such as Muostakh Island, Stolbovoy Island, Kotelny Island and the Ulakhan-Sis Range, as well as in scattered places of the Yana-Indigirka Lowland.Russian Academy of Sciences, Geology Bulletin. (Izvestiya Akademii Nauk. Seriya Geologicheskaya), Issues 1-7. p. 55 In 1950 a baydzharakh was the last vestige of now disappeared Semyonovsky Island in the Laptev Sea. They often occur together with Yedoma (Едома) complexes and in areas with ice-wedges of considerable thickness. The concept of territorial protection of the New Siberian Islands, Bulletin of the Orenburg Scientific Center of the Ural Branch of the Russian Academy of Sciences - 2017
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