The scientist say that this mine was last in use around 48,000 years ago. It was used to mine ochre, which is an a material that was used extensively in human history. It is a natural clay pigment ...

With the resources and expertise from Mizzou, the group, headed by MacDonald, identified the location of the oldest ochre mine in the world and mapped out how ochre from the mine was distributed ...

CHEYENNE – The upcoming Wyoming State Archives Speaker Series will feature a presentation by Kent Hargraves, who will discuss the history and significance of the Red Ochre Mine, one of the world ...