Aldan River
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The Aldan River (Russian: Алдан) is the second-longest tributary of the Lena River in eastern Siberia. The river is 2,273 km (1412 mi) long, of which around 1,600 km (994 mi) is navigable.
It rises in the Stanovoy Mountains south west of Neryungri, then north east past Aldan and through Tommot, Ust'-Maya, El'dikan and Khandyga before turning north west and joining the Lena near Batamay.
The river's main tributaries are the Amga River, Uchur River and Maya River. Its basin is known for gold and for Cambrian fossils.