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, Illinois city was $24,117. About 5.9% of families and 7.9% of the population were below the poverty line, including 13.8% of those under age 18 and 7.0% of those age 65 or over. Galena is a popular tourist destination hosting well over one million visitors each year. Galena is also popular with Chicagoans, many of whom keep second homes in the area. 85 percent of the structures in Galena are within the Galena Historic District, which is listed on the National Register of Historic Places and greatly contributes to the city's popularity. The Old Market House State Historic Site, built in