Longest estuary

Last updated: October 16, 2017 at 14:57 pm

800 km (500 miles) – The Gulf of Ob Estuary, Russia. Maximum width is 80 km (50 miles). The mouth of the Gulf of Ob is in the Kara Sea, which is part of the Arctic Ocean.

SOURCE:
Encyclopedia Britannica. Ob River. Physiography.

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