THE NEBRASKAN ICE INVASION 231 



5. Blue clay, pebbly (Kansan) 65 feet 



4. Sand with fragments of wood, 5 feet vers- fine, coarser below (Aftonian) 15 ' 



3. Blue clay, hard, pebbly (Nebraskan) 65 



2. Sand 116 " 



1. Clay, black, hard, tough, dries like shale (Maquoketa shale) 44 " 



Height of section 340 ' 



In Henry County, on the poor farm at Mt. Pleasant, the bones of a mastodon 

 were found in a well, either in or immediately below the Kansan drift. 26 In 

 Page County, near Blanchard, the bones of a mastodon were found in a well 

 54 feet below the surface and pieces of wood at 90-95 feet (vide Calvin and 

 White). An old soil beneath Kansan drift has been recorded from the follow- 

 ing localities, but no definite species of plants or animals are mentioned. 

 Decatur, 27 Benton, 28 Poweshiek, 29 Wayne, 30 Iowa, 31 Chickasaw, 32 Monroe, 33 

 Mitchell, 34 Kossuth, Hancock, and Winnebago, 35 Cherokee and Buena Vista, 36 

 Clay and Obrien, 37 Henry, 38 Howard, 39 Cedar, 40 Worth, 41 Dubuque, 42 Ply- 

 mouth, 43 Delaware, 44 Johnson, 45 Marshall, 46 Guthrie,' 7 Pottawattamie, 4S Mills, 49 

 Fremont, 50 Lyon and Sioux, 51 and Wapello counties. 52 



M Anderson, Augustana Lib. Pub., No. 5, p. 27. 



» Bain, Geol. Iowa, VIII, p. 286. 



28 Savage, Geol. Iowa, XV, p. 201. 



" Stookey, Geol. Iowa, XX, p. 260. 



£0 Arey, Geol. Iowa, XX, p. 224. 



31 Stookey, Geol. Iowa, XX, p. 172. 



52 Calvin, Geol. Iowa, XII, p. 279. 



33 Beyer, Geol. Iowa, XII, p. 379. 



34 Calvin, Geol. Iowa, XII, p. 326. 



35 Macbride, Geol. Iowa, XII, p. 100. 



36 Macbride, Geol. Iowa, XII, p. 317. 



37 Macbride, Geol. Iowa, XI, p. 483. 



38 Savage, Geol. Iowa, XII, p. 289. 

 38 Calvin, Geol. Iowa, XII, p. 62. 

 40 Norton, Geol. Iowa, XI, p. 343. 



• u Beyer, Geol. Iowa, X, p. 357. 



42 Calvin and Bain, Geol. Iowa, X, p. 463. 



43 Bain, Geol. Iowa, VIII, p. 340. 



44 Calvin, Geol. Iowa, VIII, p. 164. 



45 Calvin, Geol. Iowa, VII, p. 84. 



46 Beyer, Geol. Iowa, VII, p. 230. 



47 Bain, Geol. Iowa, VII, p. 468. 



48 Udden, Geol. Iowa, XVII, p. 496. 



49 Calvin, Bull. Geol. Soc. Amer., XX, p. 344. 



60 Udden, Geol. Iowa, XII, pp. 165-167. 



61 Wilder, Geol. Iowa, X, p. 124. 



■* Shimek, Geol. Iowa, XX, p. 307. 



