Well that is hard to say, only the people who made the marks could say for sure. Aboriginal people had many levels of knowledge; some of which were available to anyone and others which could only be revealed to people initiated in the right way.
I remember meeting Aboriginal elders in northern NSW who talked about much of the ‘dreaming’ of their people which had been lost. It was lost because their parents and grandparents had refused to pass it on to even their own relatives because they had not been properly initiated in the old ways.
However given that the hand prints were all of young people ‘coming of age’ was probably part of the story. But it was most likely more complex, the platform the shelter sits above has an amazing view far out into the northern plains.
Now a little more ‘down to earth’
Susan Flett Swiderski asked of my last post “I take it you have a LOT of waterfalls in your area?”

Victoria, the state I live in, is Australia’s second smallest. It is about the size of Minnesota in the USA or about the same size as the United Kingdom
The waterfalls I have posted in the past few months are in an area 473km (295 miles) across. To a Victorian that seems like a huge space but to a Queenslander like me it seems a relatively short distance. Queensland our second largest state is bigger than Alaska (or in European terms bigger than France, Germany, Spain and Italy put together).
Now as a reward for making you sit through all that some piccies of Trentham Falls that I took on Sunday.