Carbonate-hosted lead-zinc ore deposits and pyrite thus form. Commonly MVT deposits form by the combination of hydrocarbon pyrolysis liberating zinc-lead ions and sulfur to form an acidic solution which dissolves the host carbonate formation and replaces it with massive sulfide accumulations. This may also take the morphology of fault-hosted stockworks, massive tabular replacements and so forth. Porous limestones may form disseminated ores, however most MVT deposits are massive sulfides with knife-like margins between carbonate and sulfide mineralogies. Ore minerals in carbonate replacement deposits are typically lead sulfide, galena, and zinc sulfide sphalerite. Weathered equivalents form anglesite, cerussite, smithsonite, hydrozincite and secondary galena and sphalerite
Galena, Maryland Galena, Maryland Galena is a town in Kent County, Maryland, United States. The population was 612 at the 2010 census. Galena is located at (39.341680, -75.878444). According to the United States Census Bureau, the town has a total area of , all of it land. Galena was founded in 1763 under the name Down's Cross Roads, after William Downs, a local tavern owner. The name was later changed to Georgetown Cross Roads sometime before 1813, and finally to Galena in 1858. The name comes from a supposed silver mine in the vicinity of the town, which extracted the metal from