Undiuliung

Undiuliung

 

(also Iundiuliun), a river in the Yakut ASSR, a right tributary of the Lena River. The Undiuliung is 414 km long and drains an area of 12,800 sq km. It rises in the Orulgan Mountains. In its upper course it is a mountain river with many rapids; in its lower course it flows along the Central Yakut Plain, dividing into two branches as it approaches its mouth. The river is fed by snow and rain. The Undiuliung has numerous Aufeis formations. The total area of the formations is about 23 sq km.