-32- 



1. Limestone - gray, shaly, fossilif erous. 



2. Shale - dark gray to gray, calcareous. 



3. Siltstone - gray to brownish gray, non-fossilif erous. 



4. Shale - greenish gray, poorly exposed. 



5. Shale - greenish gray, calcareous, fossilif erous. 



6. Limestone - light gray, argillaceous, massive, very f ossilif erous ; 

 contains abundant brachiopods as well as pelecypods, gastropods, 

 and sharks' teeth. 



7. Shale - dark gray to black, soft; 4 inches of irregular soft coal at 

 bottom. 



8. Clay - gray to very dark gray, calcareous, blocky; uppermost 6 

 inches contains carbonaceous impressions, is noncalcareous , and 

 is laminated. 



9. Shale - red, laminated, sandy, micaceous. 



O 



cr 



CD 

 O 



cr 

 o 



CD 

 CO 



-z. 

 < 



UJ 



_l 



-b: 



LITTLE 

 VERMILION LS. 



t 



fi 



specimen frequency 

 ♦100 50 15 5 



5 FT 



LA SALLE 

 LS. 



10. Shale - greenish gray, sandy, 

 micaceous; the lowermost 6 inches 

 consists of red and gray limestone 

 concretions. 



11. Shale - greenish gray, calcareous, 

 and gritty. 



12. Limestone - brownish gray, dolo- 

 mitic, massive, dense, micritic, 

 fossilif erous. 



13. Shale - gray, calcareous; contains 

 abundant nodules of fossilif erous 

 limestone. 



14. Limestone - gray, crystalline, algal, 

 crinoidal, fossilif erous; con- 

 tains brachiopods and gastropods. 



Fig. 14 - LA SALLE EAST, section in abandoned quarry, north of U.S. Route 6, 

 just east of cemetery. SW^ NE% Sec. 14, T. 33 N., R. IE., La 

 Salle County, La Salle Quadrangle. The histogram indicates the 

 number of conodonts found per kilogram of sample; the bars are 

 divided to show ratios between the genera Gondolella (line pattern) , 

 Strep tognathodus (white) , and Cavusgnathus (black) . 



