shallow, salt-crusted depression of 70 sq mi (180 sq km), in the Mallee district, northwestern Victoria, Australia, 195 mi (314 km) northwest of Melbourne. Usually dry, it is occasionally fed by Tyrrell Creek. An extraction plant at Sea Lake, a town on the lake's south shore, harvests the salt deposits. The lake was visited (1838) by Edward Eyre, who was seeking new grazing lands, and was named after an early settler in the Port Phillip area of South Australia.