During the Ice Age about 20, 000 years BP, the area now the bay of Port Phillip would have been dry land, and the Yarra and Werribee river would have joined to flow through the heads then south and south west through the Bassian plain before meeting the ocean to the west.

During the Ice Age about 20, 000 years BP, the area now known as Port Phillip would have been dry land, and the Yarra and Werribee river would have joined to flow through the heads then south and south west through the Bassian plain before meeting the ocean to the west.

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