 bolshoy lyakhovsky island (), or great lyakhovsky, is the largest of the lyakhovsky islands belonging to the new siberian islands archipelago between the laptev sea and the east siberian sea in northern russia. it has an area of 4,600&nbsp;kmÂ², and a maximum altitude of 270 m (emy tas).anonymous, 1911, new siberia archipelago the peninsula projecting towards the west of the island is the kigilyakh peninsula (poluostrov kigilyakh). off bolshoy lyakhovsky island's southwestern cape lies a small islet called ostrov khopto-terer. the lyakhovsky islands are named in honour of ivan lyakhov, who explored them in 1773. ==geology== bolshoy lyakhovsky island consists of highly folded and faulted precambrian metamorphic rocks and turbidites; mesozoic turbidites and igneous rocks; and cenozoic sediments. exposed in southeastern part of this island, the older precambrian. early proterozoic, metamorphic rocks consist of schists and amphibolites. small exposures of late proterozoic schistose, quartzose sandstones and phyllitic, sericite-quartz schist (turbidites) also occur in the southeastern part of bolshoy lyakhovsky island. the bulk of this island consists of late jurassic to early cretaceous turbidites composed of interbedded fine-grained sandstones, thinly bedded siltstones, and argillites. the precambrian and late jurassic to early cretaceous rocks are intruded by late cretaceous granites and granodiorites.kos'ko, m.k., b.g. lopatin, and v.g. ganelin, 1990, major geological features of the islands of the east siberian and chukchi seas and the northern coast of chukotka. marine geology. vol. 93, pp. 349â367.fujita, k., and d.b. cook, 1990, the arctic continental margin of eastern siberia, i
New_Siberian_Islands Prehistory_of_the_Arctic