718 



INDEX 



Wheeler, W. M., 630. 



White, D., 569. 



White River formation, 604. 



Willis, B., 575. 



Williston, S. W., 682. 



Wilson, A. W. G., 118. 



Wind, abrasion by, 34. 



and sand, 44-52. 



deflation by, 44. 

 Wind cave, South Dakota, 70. 

 Wind gaps, 108. 

 Wind River formation, 604. 

 Wisconsin ice sheet, 666. 

 Wisconsin stage, 649. 

 Worms, Cambrian, 415,, 



Proterozoic, 397. 



Worthenella cambria, 415. 

 Worthenia tabulata, 482. 



Yarmouth stage, 649. 



Yellowstone National Park, 66, 67, 323. 



Young rivers, 109-110. 



Youthful shore line, 231. 



Youthful topography, 109. 



Zambezi River, course of, 260. 

 Zeuglodon, 59S~597- 

 Zinc minerals, 687. 

 Zone of flow, 258. 



of fracture, 58, 258. 

 Zygospira recurvirostris, 432. 



3839 



t \ 



