At the base of a tall waterfall on a tributary of Middle Harbour Creek are a number of what may be deep axe grinding grooves. (They are likely to be in the vicinity of an engraving a site documented by McCarthy, which has not been located since it was documented in the 1940s – but grooves my hve been naturally formed).

There are three grooves located directly under the base of the falls.

The surrounding rocks have more grinding grooves.
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