Narrabeen group

The Narrabeen group of sedimentary rocks occurs in the Sydney Basin in eastern Australia.

Partly in these rocks plants, fish and amphibious animals are petrified.

The red and green shales of the Narrabeen Group are water-tight over the sandstone bodies and the shale of Bald Hill, which forms the top layer of the Narrabeen Group, forms a regional water-barrier layer.

Over the Narrabeen Group, the younger stratigraphic formation of Hawkesbury sandstones accumulated.

It can also be seen in various places in the Sydney Basin, such as Long Reef near Narrabeen, and at sea level around Broken Bay.