Transactions . hebottom of the sub-drifts before caving the back. The Pioneer Mine.—This mine is on what is thought to bethe continuation of the Chandler deposit; and, as the pitch iseast, the Pioneer has to do all the pumping for both mines,since the water from the Chandler percolates through theintervening ground. Mines on the Mesabi Range. On the Mesabi range are found occurrences of ore which, atthe time of their discovery, were entirely new to the LakeSuperior region. The deposits are beds of great area andrelatively small depth, dipping to the south at low angles, andcovered with glacial
Transactions . hebottom of the sub-drifts before caving the back. The Pioneer Mine.—This mine is on what is thought to bethe continuation of the Chandler deposit; and, as the pitch iseast, the Pioneer has to do all the pumping for both mines,since the water from the Chandler percolates through theintervening ground. Mines on the Mesabi Range. On the Mesabi range are found occurrences of ore which, atthe time of their discovery, were entirely new to the LakeSuperior region. The deposits are beds of great area andrelatively small depth, dipping to the south at low angles, andcovered with glacial drift, varying in thickness, in the developedmines, from 2 or 3 to 100 ft. One of the largest of thesedeposits, the Biwabik, has been described in our Transactions* Although generally considered to be a district of open-pitmining, the Mesabi has really only five deposits which are * The Biwabik Mine, by H. V. Winchcll and J. T. Jones, Trans., xxi., 951. 358 METHODS OF IRON MIXING IN NORTHERN MINNESOTA. h 3 J. METHODS OF IRON MINING IN NORTHERN MINNESOTA. 359
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
