Transactions . haped trough,made by the junction of a diorite mass and a dike. The hard oreis between these and below the Ishpeming quartzite. On theleft the hard ore again rests on soapstone, which is upon andinterstratified with jasper, and is overlain by the Ishpemingquartzite. Scale, 200 feet to the inch. Fig. 9 is a cross-section of the Barnum mine, showing hardore resting either upon folded soapstone or upon jasper, andoverlain by soapstone. At the right of the figure is seen alayer of ore between two soapstone dikes. Scale, 200 feet tothe inch. Fig. 10 is a longitudinal section of the Q
Transactions . haped trough,made by the junction of a diorite mass and a dike. The hard oreis between these and below the Ishpeming quartzite. On theleft the hard ore again rests on soapstone, which is upon andinterstratified with jasper, and is overlain by the Ishpemingquartzite. Scale, 200 feet to the inch. Fig. 9 is a cross-section of the Barnum mine, showing hardore resting either upon folded soapstone or upon jasper, andoverlain by soapstone. At the right of the figure is seen alayer of ore between two soapstone dikes. Scale, 200 feet tothe inch. Fig. 10 is a longitudinal section of the Queen, Prince ofWales, and South Buffalo mines, showing the soft ore restingupon an impervious foot-wall of Siamo slate, and grading up-ward into jasper. Scale, 200 feet to the inch. THE MARQUETTE RANGE. 545 Fi£. 11 is a cross-section of same mines, showing; how theslate is folded into two troughs, which are shown by the lon-gitudinal section (Fig. 3) to have a western pitch. Scale, 200feet to the inch. Fig. The first definite knowledge of the existence of iron-orein this region dates from the year 1844, when the U. surveyor reported its discovery in running the 546 THE MARQUETTE RANGE. township line south from Teal Lake, near Negaunee. Previousto this time there had been rumors of its existence as well asthat of other metals. Even as early as 1636, in Lagarclesbook of travels, published in Paris, there is a mention of iron;but there is now no generally known account of any attemptto develop the mineral resources of the Lake Superior districtduring the occupancy of the country by the French, when somuch was recorded of the travels of the Jesuit fathers and ofthe traders. The period of occupation by the British also passed without anywork in that direction, except so far as copper was concerned,and this work was entered into by a company of prominentEnglishmen. After a year or more of search for mineral veinsfrom which the float had originally come, the enterpri
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
