LIST OF ILLUSTRATIONS. 



Frontispiece. — Bear Lodge, looking eastward. 



Page. 



Fig. 1. Section through Rawhide Butte 27 



2. Section of uplift at headwaters of the Niobrara 28 



3. Section through outer foothills at Camp Jenney, east fork of Beaver 34 



4. Head of Golden Valley, illustrating park scenery 56 



5. " Saw teeth," of granite, near Harney Peak 70 



6. Granite forms near Harney Peak 72 



7. Plan and section of schist included in granite 72 



8. Ground plan and section of Granite Lena 74 



9. Section on Spring Creek 82 



10. Section of the Potsdam sandstone on lower Rapid Creek 85 



11. Section of the Potsdam on lower Spring Creek 87 



12. Section of Potsdam sandstone on lower French Creek 90 



I'-i. Section of the Potsdam on Box Elder Creek 91 



14. Section of Potsdam on lower Rapid Creek 94 



15. Ideal section of the Carboniferous Plateau 117 



16. Ideal section across the Carboniferous Plateau at Camp Jenney 119 



17. Section on iVraphibious Creek 122 



18. Section along the lower cafion of Rapid Creek 124 



19. Ideal section across the Red Valley at Camp Jenney 140 



20. Ideal section across the Red Valley on Amphibious Creek 141 



21. Ideal section across the Red Valley on Rapid Creek 142 



22. Ideal section across the Red Valley near Spearfish Crook 144 



23. Ideal section across the Red Valley through Snn Dance Hills 146 



24. Section across the valley of the Belle Fourcho near Bear Lodge 147 



25. Ideal cross-section of the Black Hills 206 



26. Contour map of the Black Hills displacement ." 208 



27. Diagram to exhibit the relation of the drainage system of the Black Hills to the zones 



of hard and soft strata 214 



28. Longitudinal section of the bed of Spring Creek 244 



Plates I-XVI. Paleontology 4C8 



I-II. Microscopic Petrography 528 



XV 



