Bulletin of the United States Geological Survey--The Nature and Origin of Deposits of Phosphate and Lime . all pits and trenches, rarely exceeding twenty feet in depth, and ofteninterfering considerably with later and larger mining operations. There are two principal districts in Canada where apatite occurs inconsiderable quantities. The first is in Ottawa County, Province of Que- 1 J. D. Dana: Manual of Mineralogy and Litliolojjy, 18d5, p. 213. 2 O. Ramon T. Mniios do Lima: Estudios qminicoa sobre economfa agricola eiigeneral, y particularruente sobre la irnportancia de los abonos fosfatados.
Bulletin of the United States Geological Survey--The Nature and Origin of Deposits of Phosphate and Lime . all pits and trenches, rarely exceeding twenty feet in depth, and ofteninterfering considerably with later and larger mining operations. There are two principal districts in Canada where apatite occurs inconsiderable quantities. The first is in Ottawa County, Province of Que- 1 J. D. Dana: Manual of Mineralogy and Litliolojjy, 18d5, p. 213. 2 O. Ramon T. Mniios do Lima: Estudios qminicoa sobre economfa agricola eiigeneral, y particularruente sobre la irnportancia de los abonos fosfatados. (497) 24 DEPOSITS OF PHOSPHATE OF LIME. [BULL. 46. bee. It consists of a belt running from near the Ottawa River, on thesouth, for over sixty miles in a northerly direction, through Bucking-ham, Portland, Templeton, Wakefield, Denholm, Bowman, Hincks, andother townships. The belt probably stretches still farther to the north,but the country in that direction has been but little explored, and isscarcely known, except to trappers and Indians. The belt averages inwidth from fifteen to twenty-five Fig. 2. Apatite in the Bonanza pit, Union mine, Portland, Ottawa Connty, Quebec, Canada. A, apa-tite; B, mica; C, white feldspar; D, pink and white feldspar, mica, and pyroxene. Scale: 1 inch —16 feet. f The second phosphate district is in Ontario, principally in the countiesof Leeds, Lanark, Frontenac, Addington, and Renfrew. This districtis much larger than that of Quebec. But the apatite is much morescattered, and, though special deposits are in some places much morecontinuous than those of Quebec, the mineral has not yet been discov-ered in such large pockets as occur in the latter district. The beltwhich contains the deposits runs from about fifteen miles north of theSt. Lawrence River in a northerly direction to the Ottawa River, a dis-tance of about one hundred miles. It varies from fifty to seventy-fivemiles in breadth. The above-mentioned districts are the regions wher
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