$TRLR ~ Geology - Through the west of the district is a trending belt of Calaveras slate, schist, and quartzite with limestone lenses, while the east consists of a quartz porphyry belt that lies in the central portion, and greenstone and amphibolite schist to the east. Few serpentine lenses are present and the northeastern area is overlain by glacial moraines. There are a series of trending quartz veins that range anywhere from a few feet to as much as 40 feet in thickness. These veins can be found in the metamorphic rock, and the ore bodies contain free gold, pyrite, and minor galena and chalcopyrite. Several fairly magnetic deposits can be found in the north end of the district.!
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