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Hawkesbury Sandstone

0.25 x 0.25 x 0.05 m

Hawkesbury Sandstone forms the spectacular cliffs that span the Sydney Basin from the Watagans to the Illawarra. During Triassic times (200 million years ago) in a vast braided river system extended across South Eastern Australia, depositing up to 200m of quartz rich sand. This sand has been compacted and cemented to form a very hard sandstone. The warm golden colour and interesting patterns in the stone are the result of siderite, an iron rich mineral, being deposited around the sand grains as water moves through the stone.

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