How the world's biggest iron ore miner destroyed two sacred Aboriginal cavesHow the world's biggest iron ore miner destroyed two sacred Aboriginal caves ...

It’s a natural clay pigment that’s rich in iron compounds ... at least 48,000 years ago. People appear to have returned to the surrounding region for ochre mining for thousands of years ...

Because iron ore can be found near the surface people could mine down for it in open pits ... This is Clearwell Caves. And these are the tools they would have used to dig it out.