Tas-Kystabyt

(also Sarychev Range), a mountain range in the interfluve of the upper Indigirka River and one of its right tributaries, the Nera, in the Yakut ASSR. The Tas-Kystabyt is about 175 km long and rises to a maximum elevation of 2,341 m. It is composed of aleurolites and argillites, with intrusions of granite. Sparse larch forests grow on the lower slopes.