LIST OF ILLUSTRATIONS. 



FIGS. PAGE 



1. Illustration of rifting in granite at Cape Ann, Mass. After R. S. 



Tarr 12 



2. Open fissure in the Aubrey limestone (Upper Carboniferous) 25 



miles north of Canon Diablo Station, on the A. & P. R. R., Ari- 

 zona. Photographed by G. K. Gilbert, 1892 15 



3. Normal fault at Leadville, Colo. After A. A. Blow 17 



4. Reversed fault at Holly Creek, near Dalton, Ga. After C. W. 



Hayes 18 



5. Illustration of one vein faulting another at Newman Hill, near 



Rico, Colo. After J. B. Farish 20 



6. Banded vein at Newman Hill, near Rico, Colo. After J. B. Farish. 36 



7. Illustration of the oxidized zone, or gossan, the zone of enrichment, 



and the unchanged sulphides, at Ducktown, Tenn. After A. F. 

 Wendt 39 



8. Section of the Hurst limonite bank, Wythe Co., Va., illustrating 



the replacement of shattered limestone with limonite and the 

 formation of geodes of ore. After E. R. Benton 76 



9. Geological section of the Amenia mine, DutchessCo., N. Y., illus- 



trating a Siluro-Cambrian limonite deposit. After B. T. Put- 

 nam 80 



10. View of the Siluro-Cambrian brown hematite bank at Baker Hill, 



Ala. From the Engineering and Mining Journal 83 



11. Map and sections of the Burden Spathic ore mines. After J. P. 



Kimball 90 



12. Clinton ore, Ontario, Wayne Co., N. Y. After C. H. Smyth, Jr. . 93 



13. Clinton ore, Clinton, N. Y. After C. H. Smyth, Jr 94 



14. Clinton ore, Eureka mine, Oxmoor, Ala. After C. H. Smyth, Jr. 95 



15. Cross section of the Sloss mine, Red Mountain, Ala. From the En- 



gineering and Mining Journal 95 



16. Map of the vicinity of Birmingham, Ala. After W. P. Barker. . . 96 



17. Open cut in the Republic mine, Marquette range, showing a horse 



of jasper. From a photograph by H. A. Wheeler 103 



18. Cross sections to illustrate the occurrence and associations of iron 



ore in the Marquette district, Michigan. After C. R. Van Hise. 105 



19. Plan of Ludington ore body, Menominee district, Michigan. After 



P. Larsson . .*. 108 



