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Geology and ore deposits of the Philipsburg quadrangle, Montana
William Harvey Emmons, Frank Cathcart Calkins
1913, Professional Paper 78
The Philipsburg quadrangle is bounded by parallels 46° and 46° 30' and meridians 113° and 113° 30'. Its length from north to south is 34.5 miles, its average width east and west 23.8 miles, and its area 827.42 square miles. As shown on the index map (fig. 1), it is not far<br...
The San Franciscan volcanic field, Arizona
Henry Hollister Robinson
1913, Professional Paper 76
LOCATION OF AREAThe San Franciscan volcanic field, which takes its name from San Francisco Mountain, the largest volcano of the group, covers about 3,000 square miles in the north-central part of Arizona, as shown by the shaded space on the index map forming figure 1. The center of the field...