Summary: Axe grinding grooves and water channels along a creek below the Topham Trail.

Along a small creek near the Topham Trail are a few Axe Grinding Grooves (AGGs).

Between some of the potholes in the creek bed are channels, which direct water seepage into and around the potholes. Research by Jo McDonald found that: “water channels occur on a small proportion of engraving sites (c.3%). All sites with water channels also have grinding grooves present. Of the sites which contain engravings and grinding grooves, 23% also have water channels”.

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Aboriginal Sites by National Park

The Greater Blue Mountains World Heritage Area protects over 3,000 known Aboriginal heritage sites, and many more which are yet to be recorded. This area includes the Blue Mountains National Park, Gardens of Stone, Wollemi National Park and Yengo National Park.
Located to the north-west of Sydney, just south of the Dharug and Yengo National Parks, Maroota has a high concentration of (known) Aboriginal sites. Many more Aboriginal heritage sites are located in the Marramarra National Park. The original inhabitants of the area were the Darug people.
Over a hundred Aboriginal sites have been recorded in the Hornsby region, with many of these in the Berowra Valley National Park and around the suburb of Berowra.