As I shared a tree with a scar here, I thought I'd share this photo of the scar trees at Griffith Pioneer Park Museum.
These two trunks were moved to the Museum in the early 1970s from outside Darlington Point, which is a township south of Griffith on the northern side of the Murrumbidgee River.
In the foreground is a trunk with many coolamon-shaped scars, while through the hollow the scar for a canoe can be seen.
An indigenous heritage officer told me the number of coolamon-shaped scars would suggest this tree sat on a boundary. This makes sense to me as I'd expect it would be interpreted by someone visiting the region that many people live in this area.