140 J. \V. Beede — Correlation of tke Gtiadahipian. 



would expect the Gnadaliipian faunas to cease as abruptly 

 n]>oii the strata chaii<>;iii<j; to the red beds as the Kansas faunas 

 do upon entering the Oklahoma red beds. 



At the same time, owing to the very nature of the origin of 

 the red beds, their extreme southwestern part may have been 

 deposited slightly later than the main mass farther to the north 

 and east. However, this is regarded more in the nature of a 

 possibility than a probability. 



The accompanying map (fig. 3) indicates the probable rela- 

 tionship of the marine areas during Council Grove-Chase and 

 Guadalupian time in the immediate area under consideration. 

 No attempt is made to show the full extent of deposits laid 

 down at this time. The full lines indicate marine conditions 

 and the lines alternating with stippled ones eontinental-maYine 

 deposition. The extent to wiiich the two factors contributed 

 to the formation of the red beds is at present unknown. The 

 area of marine conditions in Central Texas is to represent the 

 Albany sea. 



Bloomington, Indiana. 



