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Geological Eras and Periods

Ordovician Period

About 490 to 434 million years ago

Brachiopod assemblage.
Assemblage of brachiopod Archaeorthis from the Lower Ordovician of Waratah Bay, South Gippsland.
Source: Museum Victoria.
Graptolites.
Graptolite Tetragraptus fruticosus from the Early Ordovician, from Campbelltown, Victoria.
Source: Museum Victoria.


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