Fine-grained massive sulfide
By Pacific Coastal and Marine Science Center
June 2022 (approx.)
Detailed Description
Close up of fine-grained massive sulfide containing the primary minerals pyrrhotite, sphalerite, and barite. Weathering has produced secondary minerals, including iron oxide and possibly jarosite. Second image shows the same rock under an ultraviolet light source, revealing the minerals that fluoresce under the light.
Sources/Usage
Public Domain.