. Transactions . s limestone and the overlying fel-site, with additional or incidental ore-accumulations in the limestonein irregular cavities, directly or indirectly connected with the planeof contact by irregular and often minute conduits, which a carefulsearch reveals. The best examples of this type occur on Iron Hill, in the Iron NOTES OX THE LEADVILLE ORE-DEPOSITS. 283 mine proper, and the Silver-Wave-Silver-Cord property. Inthe former, the simple contact-deposit is well developed and inci-dental ore-accumulations are found in the lime. The Silver-Wave-Silver-Cord property shows the same
. Transactions . s limestone and the overlying fel-site, with additional or incidental ore-accumulations in the limestonein irregular cavities, directly or indirectly connected with the planeof contact by irregular and often minute conduits, which a carefulsearch reveals. The best examples of this type occur on Iron Hill, in the Iron NOTES OX THE LEADVILLE ORE-DEPOSITS. 283 mine proper, and the Silver-Wave-Silver-Cord property. Inthe former, the simple contact-deposit is well developed and inci-dental ore-accumulations are found in the lime. The Silver-Wave-Silver-Cord property shows the same contact-deposit continued onits strike, but the ore-accumulations in the Lime are heavier than inthe Iron mine, probably GO per cent, of the ore extracted havingcome from out of the limestone. The deposit continues on its strikefor more than 3600 feet further south, through the Lime-Smugo-ler,Stone, Rock, and Dome claims; and the larger amount of ore inthese claims has been taken from the contact-deposit. Figs. 5. Scale 100 l showing Contact Carbonate-deposit on Iron Hill. and 6 show the position and relations of the formations here. is a vertical section on the line A A, Fig. 6, at right angles withthe strike of the strata; Fig. 6 is a vertical section on the line BBof Fig. 5, parallel with the strike, and coinciding with the boundarybetween the Lime and Smuggler claims, while the section of Fig. 5is taken through the new south incline of the Lime, into the Smug-gler claim. In these sections the dike has not been delineated,because its outlines have not been determined bv , its existence there has been proved by a series of sur-face pits, excavated along the side line common to the two claims. The main ore-deposits of Carbonate Hill also occur as contact-deposits between the blue limestone and the overlying felsite; but,in addition, a second and lower ore-bearing layer has been found, 284 NOTES ON THE LEADVILLE ORE-DEPOSITS. c
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
