. The ore deposits of Utah. A. PHOTOMICROGHAPH OF SAMDSTONE COPPER OKK. Lifrht areas,quartz grains; dark ;oi)i)er siilphiilos (€lialco<!ilcand chalcopyrile).. B. PHOrOMICROCiKAPH OF SAiNDSTONK COPPER ORESHOWING COPPER SULPHinE MATRIX. Black areas, quartz grains. Gray mettled areas, copper sulphide; light areas, chalcopy rite; dark areas, chaleociu;.

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectminesandmineralresou