Low grade metamorphic rock. Marble with several quartz veins running through it. Pyrite associated with the quartz has weathered resulting in a coating of iron oxide on the marble/limestone surface. Weathering of the pyrite has also resulted in the etching of the quartz.
Low grade metamorphic rock. Marble with several quartz veins running through it. Pyrite associated with the quartz has weathered resulting in a coating of iron oxide on the marble/limestone surface. Weathering of the pyrite has also resulted in the etching of the quartz.