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

Red Hands Cave, Glenbrook (Blue Mountains)
The Blue Mountains National Park (and surrounding areas along the Great Western Highway) is thought to have over a thousand indigenous heritage sites, although much of the park has not been comprehensively surveyed. The Aboriginal rock sites in the Blue Mountains include grinding grooves, stensils, drawing and rock carvings.
Hornsby Shire - which is the largest LGA in the Greater Sydney Metropolitan region - contains approximately 600 recorded Aboriginal rock art sites (and over 1,200 Aboriginal heritage sites). These date back from thousands of years to post-European contact art.
Over 40 sites have been recorded within the park; many were located along the river bank and were flooded by the building of the weir in 1938.