Transactions . Fleet.) tons of merchantable ore; assuming a shrinkage of one-third in gradingand washing, the orebody originally contained about 18,000 tons of form of this large orebody is shown in plan and cross-sections, inFig. 5, a, b, c by J. R. Van Fleet, the engineer in charge of the mine. * It is reported by Dr. P. Frazer in Vol. CCC (Lancaster County) of the SecondGeol. Survey of Pa., p. 192, that 95,000 tons of chrome ore was removed from theWood mine in Lancaster County, Pa. The mine was opened in 1828. 112 U10(-i:\T STUDIES OF DOMKSTIC CIIUOMITK DETOSITS Sketches of chromit
Transactions . Fleet.) tons of merchantable ore; assuming a shrinkage of one-third in gradingand washing, the orebody originally contained about 18,000 tons of form of this large orebody is shown in plan and cross-sections, inFig. 5, a, b, c by J. R. Van Fleet, the engineer in charge of the mine. * It is reported by Dr. P. Frazer in Vol. CCC (Lancaster County) of the SecondGeol. Survey of Pa., p. 192, that 95,000 tons of chrome ore was removed from theWood mine in Lancaster County, Pa. The mine was opened in 1828. 112 U10(-i:\T STUDIES OF DOMKSTIC CIIUOMITK DETOSITS Sketches of chromite bodies in eastern Oregon by L. G. Westgate (, d, e), further ilkistrate the variabihty in form, size and border of chro-mite orebodies. Other large bodies have been found in Fresno, San LuisObispo, and I]ldorado Counties in CaHfornia, as well as in Josephine andGrant Counties in Oregon, although in some of these cases the ore iscontained in a series of overlapping lenses so near together as to be easily. P^iG. od.—Section of chromite orebody, Brannan claim. (L. G. Weslgdle.) operated as one mine. The majority of chrome orebodies mined outin the United States within the last few years were relatively number of chrome mines in the United States which contributed tothe total output of ore in 1918 was about 240; the average yield, calculatedat 50-per cent, grade, was therefore about 270 tons. Veiy few minesworked upon the same body of ore throughout the year, and many minesoperated on five or more orebodies. As compared with the extensive sw FirmSerpentine NEl
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
