314 



TRANS. OF THE ACAD. OF SCIENCE. 



Section on Missouri River (continued). 



5 

 4 6 



10 

 5 

 1 4 



5 



7 



2 6 



7(1 



17 



L0 



409 

 413 



414 

 424 



429 

 430 



435 

 442 



450 

 451 

 461 



433 6 



480 6 



485 

 486 



488 



496 

 506 



511 

 624 



534 



Light blue thick-bedded shales, mostly 

 argillaceous and micaceous. 



Sandstone and shales ; upper 2i feet is 

 gray ; useful for building and for ma- 

 king grindstones : 1 ft. shales in the 

 middle, and 1 ft. hard sandstone at the 

 base. 



Buff and earthy limestone. 



Slope, probably all shales and sand- 

 stone. 



Limestone, mostly blue and bluish-gray; 

 good for building purposes. 



Bluish graj* limestone ; hard and tolera- 

 bly fine-grained ; weathers with a 

 rough, sandy appearance ; contains Or- 

 thisina robusta. 



Green clay or shales ; contains limestone 

 nodules. 



Shelly ferruginous limestone; 1' of brown 

 limestone at top, and 2' of brown and 

 blue shales in the middle, with lime- 

 stone at bottom ; contains Productus 

 Rogersii, Pr. cequicostatus, Archeocida- 

 ris, &c. 



Shales at top, limestone below. 



Bluish-drab limestone. 



Slope— limestone and sandy shales, the 

 lower 5' shales. 



Bed of Tutenmergel, from 1" to 2\". 



Ashy-blue limestone, divided thus: 

 No. 1, 3" thinly laminated brownish- 

 gray limestone. 

 No. 2, 10" ashy-blue limestone ; con 



tains blue chert. 

 No. 3, 4' brown shales. 

 No. 4, blue limestone somewhat mot 

 tied. 



Limestone, mostly in irregular beds ; 

 ashy-gray and ashy buff, with occa- 

 sional thin beds interstratified; abounds 

 in Orthis hemiplicata ; in the upper stra- 

 ta are beautiful univalves. 



Shales. 



Bituminous shales. 



Ashy grayish-drab limestone; is fine- 

 grained and would look well polished ; 

 is often a uniform gray crystalline. 



Green argillaceous shales. 



Upper part thin-bedded brownish lime- 

 stone ; the middle brown and thick- 

 bedded ; below it is soft and whitish ; 

 the lower 3 feet very soft and decom- 

 posing. 



Ripple-marked sandstone and shales. 

 6j Shales. 

 6| Sandy and argillaceous shales. 



Four miles 

 below Forest 

 City, and on 

 blufls below, 

 and capping 

 tbe hills near 

 Nodaway riv- 

 er as far up 

 as Ohio Mills. 



