The Mirarr were interested in supporting new research into the age of the site and in knowing more about the early human occupants, particularly given environmental threats posed by nearby modern-day mining activities.
Because organic matter turns into gases at high heat, a loss of mass indicated how much matter was in a given sample.
This helped create a picture of the environments across the sedimentary layers of the site.
The team found that when these human ancestors arrived, northern Australia was wetter and colder.
The pigments indicate the use of paint for symbolic and artistic expression, while the tools may have been used to cut bark or food from trees.
Labs in Australia used OSL to identify the age range, Marwick explained.