CLASSIFICATION OF THE MISSISSIPPIAN SERIES 307 



The stratigraphic elements included in the Kinderhook group 

 are varied in their physical characteristics. There are limestone, 

 sandstone and shale formations. The formations are local in 

 their distribution and characters, and consequently the dif- 

 ferent minor assemblages of organisms preserved in the strata 



Fig. A. 



are more or less local in their distribution. The Kinderkook 

 fauna as a whole is known only in a very general way, no 

 detailed investigation of it has ever been attempted. It is in 

 many respects related to the Devonian faunas, and especially to 

 that fauna which had found its way into the region from the 

 northwest. 



During the progress of the Kinderhook epoch the land was 

 sinking to the south, and the southern shore line was migrating 

 in that direction. The margins of the successively younger 

 sediments transgressed further and further to the south over the 

 ancient land surface. In central Missouri, strata of late Devo- 

 nian age rest directly upon the old Ordovician land surface. 

 In southern Missouri, strata of Kinderhook age occupy the same 



