BULLETIN OF THE GEOLOGICAL SOCIETY'OF AMERICA 

 Vol. 23, pp. 125-154, PLS. 7-10 MARCH 27, 1912 



PLEISTOCENE OF SIOUX FALLS, SOUTH DAKOTA, AND 



VICINITY ' 



BY B. SIIIMEK 



{Presented by title before the Society December 29, 1910) 



CONTENTS 



Page 



lutroduction ,. 126 



Work and conclusions of previous observers , 126 



Field work 120 



Topography 130 



Geology : 136 



In general 136 



Bluff sections 1.36 



1. Fairview section 1.36 



2. Section four and one-half miles west of Fairview 137 



3. Beloit section 137 



4. Section in the southwest quarter of section 33, township 99 



north, range 48 west 137 



5. Section south of Klondike, Iowa 1.38 



6. Peterson section , 1,38 



7. Nicholson bridge section 138 



8. Exposure in section 1, to'^Tiship 99 north, range 49 west 139 



9. Bankson bluff section 139 



10. Bankson cellar and well section 139 



11. Springdale township section 130 



12. Otis mill-site section 140 



Sections at Sioux Falls 141 



13. Illinois Central Railway section east of Sioux Falls 141 



14. Hamilton sand pit , 142 



15. Collins sand pit : 142 



16. Road cut in section 14, township 101 north, range 49 west. . . . 143 

 Terrace or bench sections 144 



17. Fairview gravel pit 144 



18. Klondike section 144 



19. Section west of Klondike 144. 



20. Section along the north side of section 17, township 99 north. 



range 48 west 144 



21. Granite gravel pit 145 



^Manuscript received by the Secretary of the Society February 23, 1911. 



(125) 



