| | Journal (article/letter/editorial) | STUDIES, PROVIDENCIA ZACATECAS, MEXICO • OF FLUID MINE, F. J. SAWKINS ABSTRACT In the Providenciaarea...bodiesis comparativelysimple; sphalerite, galenaand pyrite are the major sulfideminerals,and calcite and quartz...000 metersbelow the surfaceoutcrops. / COAItUI LA • Monterre¾ ß Torreon •'" s•.•i•.•.o '"'"• ,<...lenses. This marker horizon within formation the mine. Mediumbedded (10-100 cm) grey and blue-grey, TARAISES...(1-10 100 m LA CAJA SHALE ZULOAGA L•MESTONE (base not exposed) in the map and San Marcos ore cm) |
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