Figure 3-29. Jarosite Concentrations
Jarosite concentrations (yellowish color) that formed due to oxidation in this drained marsh soil containing sulfides.
Drained or excavated marsh soils that contain large amounts of sulfides commonly have yellow efflorescences of the mineral jarosite on the exteriors of clods. Sulfides, mainly iron sulfide, occur in some tidal marsh soils and in some sedimentary rocks, such as those associated with coal or shale. When these materials are exposed (e.g., when marsh soils are drained or sulfide-bearing rock is excavated), oxidation commonly produces sulfuric acid.
Figure 3-29. Jarosite Concentrations
Jarosite concentrations (yellowish color) that formed due to oxidation in this drained marsh soil containing sulfides.
Drained or excavated marsh soils that contain large amounts of sulfides commonly have yellow efflorescences of the mineral jarosite on the exteriors of clods. Sulfides, mainly iron sulfide, occur in some tidal marsh soils and in some sedimentary rocks, such as those associated with coal or shale. When these materials are exposed (e.g., when marsh soils are drained or sulfide-bearing rock is excavated), oxidation commonly produces sulfuric acid.