The quicksilver resources of California . is, however, to the /^ -longing tTa//^ -foor Wa// Fig 48. The ore makes as a rule in a more or less metamorphicsandstone, but occasionally in metamorphic shale. This depositis strongly marked at the surface by a line of very bold crop-pings, in places standing out over 100 feet above the general course of these croppings is about S. 80° material of these croppings is a highly metamorphosedsandstone, wherein some less altered sandstone occurs and 142 QUICKSILVER RESOURCES OF CALIFORNIA. mixed with some indurated shale, in plac
The quicksilver resources of California . is, however, to the /^ -longing tTa//^ -foor Wa// Fig 48. The ore makes as a rule in a more or less metamorphicsandstone, but occasionally in metamorphic shale. This depositis strongly marked at the surface by a line of very bold crop-pings, in places standing out over 100 feet above the general course of these croppings is about S. 80° material of these croppings is a highly metamorphosedsandstone, wherein some less altered sandstone occurs and 142 QUICKSILVER RESOURCES OF CALIFORNIA. mixed with some indurated shale, in places containing agreat amount of pj^rites and their oxidation products. Therock, especially the softer parts, is impregnated with cinnabar,and small aggregates of cinnabar crystals are found dissemi-nated through very hard rock. The fissures and cracks areoften found filled with cinnabar, accompanied with calcite andsome quartz. The ledge matter contains sensible amounts ofsulphur. Near the western edge of the croppings a very good expo-sure of the formation is foun
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