Toca da Boa Vista (BA-082) is located within the municipality of Campo Formoso, 11 km east of the town of Lage dos Negros, in the State of Bahia, Brazil.

The area is karstified Salitre formation dolomite bedrock of the Una Group, the brazilian name of the Ediacaran, which is of Precambrian age, about 600 Ma old.

The microorganisms, which later reduced the amount of phosphates and sulfur in the loose sediment on the seabed before diagenesis started, did not yet exist.

[1] This process is called hypogene speleogenesis,[2] where the acid which dissolves the limestone originates from the underground, the rock, instead of from the atmosphere.

20,000 years ago an enormous river transported dead animals into the cave, which formed massive deposits of bones.