Transactions . ity and Leavenworth, Kan., where coal is minedat a depth of 804 ft. The present developed length of this bedis therefore 75 miles, and the dip 10 ft. to the mile. On thewestern edge of the Kansas coal-field the outcrop is againnoticeable, as at Osage City and Scranton, 75 miles from thedeepest operation. This curvature of the coal was no doubtcaused by a subsidence, the center of which, theoretically, wasin Iowa and Kansas, and after which the depression was filledand the surface leveled from the surrounding country. The Ozark Region.—The area to which this name is appliedi>
Transactions . ity and Leavenworth, Kan., where coal is minedat a depth of 804 ft. The present developed length of this bedis therefore 75 miles, and the dip 10 ft. to the mile. On thewestern edge of the Kansas coal-field the outcrop is againnoticeable, as at Osage City and Scranton, 75 miles from thedeepest operation. This curvature of the coal was no doubtcaused by a subsidence, the center of which, theoretically, wasin Iowa and Kansas, and after which the depression was filledand the surface leveled from the surrounding country. The Ozark Region.—The area to which this name is appliedi> a great elliptical dome-shaped elevation, extending from theMissouri river S. to Arkansas, the highest point being at CedarGap in Wright county, Mo. From this point W. to Joplinthere is a descent of 631 ft. in 100 miles, and from the samepoint southwards a descent of 700 ft. in 75 miles. There aremany evidences of an upheaval in the region. It contains much :;s I Till; MISSOURI AND ARKANSAS ZINC-MINES. Fig. 1. Coal Area Zinc-Lead Area bvV»;1 Map Showing Coal-Area, and Contiguous Zinc- and Lead-Area in Missouri andAdjacent States. (From Mines and Minerals, Scranton, Pa., vol. xviii., February, 1898.) rock of older origin than the surrounding country in general,such as granite, porphyry, and Silurian limestone that is moreor less fractured. Among the important minerals of economicvalue are iron- and copper-ores. Tin: MISSOURI AND ARE LNfl Lfl UNO-MI] head Z .—This ares extends from the coal-m<urea od the west to the miles wideon a Line through Joplin. The formation is Lower Carbonifcu- Limestone, with intercalated and intermittent bedsof chertIt is conformable with the coal-measures, having an equal dipnorthwest to where it disappears under the that it belongs to the Burlington and Keokuk group-tin. Augusta Beri( s. The following List of Localities in the three areas ahscribed, with elevations in feet abo -level, will show their relations to th
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
