GENERALIZED SECTION 



;57:> 



Generalized Section of the Alexandrian Strata in Missouri and 



Illinois 



System 



Series 



Forma- 

 tions 



Location of 

 exposures 



Description of horizons 







^ 













«M# 





* 







c3 



3S 











ci 



2 £ 











5P 



C ^ 











03 



sfe 











2 



o 













A break in sedimentation. 













Feet 









£ •"! 



Ac. Light gray, hard, thick-bedded 











fc'Si 



limestone, with Syringolites cf. 











„C5 C 



huronensis and Spirifer radiatus, 











qtf«[ 



10 feet in Calhoun and Pike 











>><»S 



counties. Pink limestone, 23 











S a .i 



feet, in Alexander County, Illi- 











°H a 



nois 10 to : 



















o 



and 

 Sec. 

 oun 

 imbi 











o 



J^W 











-(-> 



< o 











CO 























° S 2 ° 



O, C c3 



46. Light gray, hard limestone; fos- 









o 





sils numerous in certain layers. 







£ 



CO 



0) 



Rhinopora near verrucosa, Caina- 







«< 



.1 





rotceckia acinus var. convexa, 





< 



2 







Strophonellajilistrlat(i,Stvuldand- 





s 



•5" 





inia triplesiana, Stricklandinia 







M 



% 



n. sp., and Triplecia ortoni com- 





w 



W 





mon about 10 feet below the 









C« 



g m .= - = - 



top, about 



34 







PQ 













co o_ i* -^ cS 











M 

 H 



w 



ander 

 T. 14 



oun C 

 rg anc 

 Coun 



t Hill. 



Coun 



ster P 











O 



H .-j= 3 £ C = ~ 











ft 



o 



E- 



U 

 w 



< U Ph t* 











4a. Light gray limestone containing 

 Pentamerella f manniemia and 











0) £ c« 











1 a 5 5 



Pentamerus sp 



1% 









• S •" a * 













O ~ = 3$ 

























unty 

 seng 

 Cou 

 iew. 

 'ounl 

 fton. 

 kee 

 E. of 













Oi/jC>u«rt . 













Pike C 



ofKi 

 Calhou 



Belle 

 Jersey 



of Gr 

 Rank 



miles 









A possible break in the deposition. 



