The ore deposits of Utah . A. VIEW OF BINGHAM CANYON IN 1900, SHOWING LOCATION OF DISSEMINATED B. VIEW OF BINGHAM CANYON IN 1914 FROM SAME POINT AS SHOWN IN were produced by operations of Utah Copper Co. Photographs furnished by Utah Copper Co. OQUIRRH RANGE. 349 gained the black limestone thickens and thegray limestone correspondingly thins till inplaces it has been almost wholly displaced. Many of the limestone beds are siliceous, thesilica bemg present either as sand grains or aschert. In some beds the chert appears assmall nodular masses; in other beds it formsthe grea
The ore deposits of Utah . A. VIEW OF BINGHAM CANYON IN 1900, SHOWING LOCATION OF DISSEMINATED B. VIEW OF BINGHAM CANYON IN 1914 FROM SAME POINT AS SHOWN IN were produced by operations of Utah Copper Co. Photographs furnished by Utah Copper Co. OQUIRRH RANGE. 349 gained the black limestone thickens and thegray limestone correspondingly thins till inplaces it has been almost wholly displaced. Many of the limestone beds are siliceous, thesilica bemg present either as sand grains or aschert. In some beds the chert appears assmall nodular masses; in other beds it formsthe greater part. In the vicinity of some of the intrusive massesand in some places where the intrusives are notknown to be in close proximity the limestoneshave been recrystallized to white marble andcontain lime-iron silicates in small contact silicates, however, are much lessabundant in this district than in several others. The following tables ^ show the compositionof some of the limestones and the chemicalchanges resulting from their alteration: Analyses showing changes undergone by limeston
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectminesandmineralresou
