386 Adams — Carboniferous and Permian Age, etc. 



unbroken sequence. From what is known of the Permian 

 limestones of Kansas, they will be found, when followed south- 

 ward, to diminish in thickness, and this change will be accom- 

 panied by a transition to more sandy beds. This is in accord- 

 ance with the observations made by Mr. Gould. The age of 

 that portion of the Red Beds which is in strike with the 

 Permian of Kansas may confidently be expected to be found 

 to be of Permian age. This is in accordance with the evidence 

 already furnished by the vertebrate fossils. Above the 

 Permian limestones in Kansas occur the Wellington shales, 

 which are bluish and greenish gray in color. They are prob- 

 ably represented southwestward by formations which are red. 

 The succeeding formations are typical Red Beds, and have 

 thus far yielded only Permian fossils. Upon the accompany- 

 ing map (p. 385) the approximate line of transition in color has 

 been drawn with the purpose of showing that it is diagonal to 

 the strike of the Carboniferous and Permian formations. 



