HAWORTH: THE STRATIf; RAPH V OF THE KANSAS COAE MEASURES. 289 



spoken of to this, we would have a condition which would admit of 

 the western portions of such systems being elevated so that parts of 

 them were far above sea level without giving them an inclination to 



the east. Figure 2 will make this plain. Let O' be the point coin- 

 ciding with O in figure i and the lines OA, OB, etc., represent the 

 horizontal at different periods in Coal Measure time. Now while OA 

 was horizontal suppose the Cherokee shales were deposited on an 

 ocean bottom that was about horizontal. While OB was horizontal 

 suppose the Tola limestone was formed on an ocean bottom inclined 

 10 feet to the mile. But to obtain the latter, OA must have been 

 depressed. In a similar manner let each succeeding higher formation 

 have a slightly increasing dip due to ocean subsidence until 20 feet 

 to the mile is reached by the upper Permian. The Flint Hills are 

 about 150 miles west of the probable location of the point O'. Now 

 if we elevate O' about 1000 feet, and E an equal amount plus 10 feet 

 to the mile, the Flint Hills will be lifted 2500 feet above sea level and 

 still have an inclination to the west of 10 feet to the mile for their 

 strata. If this explanation is the correct one we would have to find 

 that the upper members of the Permian have a less dip to the west than 

 the lower Coal Measures, for the total angular elevation cannot 

 have equalled the depression. Mr. Adams has shown that this 

 is true. The upper surface of the Mississippian dips to the west 

 fully 21.5 feet to the mile. Above this there is a general decrease, 

 the lola limestone dipping 17 feel to the mile, while in the Flint Hills 

 region the dip is about 10 feet to the mile. 



The only reason why in this explanation it is assumed that the 

 lower members were deposited more nearly horizontal than the 

 upper ones is that the difference is so slight, as they are now found, 

 that had each been given the same dip when formed the continued 

 subsidence to the west would have given the lower members 9. much 

 greater excessive inclination than they now possess. 



