Prelims ask
Border river, Songhua, Pacific, Okhotsk. Not north-flowing.
Asia
Amur
Longest Pacific-bound river of the Russian Far East on textbook lists.
- Source
- Confluence of the Shilka and the Argun.
- Countries
- Russia and China for the long border course. The Argun headwater basin touches Mongolia.
- Direction
- East and southeast.
- Mouth
- Tatar Strait, Sea of Okhotsk — Pacific drainage.
- Length
- About 4,440 km.
- Major tributaries
- Zeya, Bureya, Songhua (China), Ussuri.
- Delta or estuary
- Estuary-like mouth into the Tatar Strait.
- Basin
- Russia–China boundary. The Songhua is the great Chinese tributary (Harbin).
- One exam fact
- Pacific, not Arctic. That single fact separates it from Ob, Yenisei and Lena.
Mains use
The east-flowing exception among the great Siberian rivers, and a boundary river.