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This photo shows some of the rock wall formations in what is thought to be a local sulfur mine in Boa Vista.

The mineral exposed here is presumed to be sulfur that lies in a local mine of Boa Vista.

Here is a close up displaying the inner walls of a local mine. It is speculated that the abundant mineral here is sulfur.

Five unidentified individuals stand in front of a local mine in Boa Vista. The identification of the mineral is uncertain, however, it may be sulfur.