In 1985, primary sedimentary sulfates were discovered in Precambrian deposits of the Baltic Shield. The search for sedimentary sulfates was based on previous identification of the protoevaporite character of certain early ...
Originally sedimentary sulfate-bearing rocks in the Precambrian of the Baltic shield were first identified in 1985. Sulfate sulfur was found in significant amounts only in chemogenic metacarbonate rocks and metamorphosed ...