Australia: The Land Where Time Began

A biography of the Australian continent 

Wianamatta Group

This is the uppermost of the series, Narrabeen Group, Hawkesbury Sandstone and the Wianamatta Group. The Ashfield Shale at the St Peters brick pits in Sydney's inner western suburbs is one of the most fossiliferous units in the Wianamatta Group is comprised of shale and sandstone layers. Kear & Hamilton-Bruce suggest it was deposited in palaeoenvironment that probably began as freshwater lacustrine but was gradually changed to brackish and eventually shallow marine conditions. 

Sources & Further reading

1. Kear, B.P. & Hamilton-Bruce, R.J., 2011, Dinosaurs in Australia, Mesozoic life from the southern continent, CSIRO Publishing.