REPORT ON FIELP WORK IN GKOLOGY. Ill 



The next formation met with in ascending the river is a limestone 

 system from 12 to 15 feet thicl<, which is first seen on the hill-top 

 south of Strawn and which passes under the surface a short distance 

 above Hartford. It is number 8 in figure 2 of plate IV. The rock is 

 very porous, and probably has but little economic value. Above 

 limestone number S there is a system of sandy shales about 75 feet 

 thick, but which covers comparatively little surface along the line of 

 this section on account of the ground rising so rapidly above Hartford. 



At the church just south of the junction of the Cottonwood and 

 Neosho rivers limestone number 9 is seen on the top of the hills, 

 from which place it extends up the river almost to Emporia before 

 passing out of sight beneath the surface. It is exposed at the end of 

 Sixth Avenue four miles east of Emporia and at the Humphrey ford 

 in section 28, township 19, range 12. It forms a vertical wall over 20 

 feet high. The same limestone system is also exposed on the north 

 side of the hill north of Emporia. It has been quarried extensively 

 in different places, and fairly good dimension stone has been obtained. 

 It is also quite noted for the large and well preserved fossil crinoids 

 which it contains. On account of its great exposure in the vicinity 

 of Wyckoff, it may be called the IVyckoff limestone. 



Above the Wickoff limestone there is a bed of shale from 50 to 60 

 feet thick which carries a great deal of sandstone. It covers the 

 whole country for miles around. Immediately on top of this is the 

 limestone system numbered 10, in plate IV. This limestone is first 

 observed on the hill-tops about four miles south and one mile east of 

 Emporia. It is also exposed on top of the hill just south of the 

 church in section t^-^-: township 19, range 11, at which place the whole 

 system is only about 5 feet thick. It continues westward a few miles, 

 but as the surface is rapidly rising it soon passes under ground. It 

 is last seen about two miles northwest of Emporia. It is character- 

 ized by being so full of seams that no large pieces can be obtained. 

 Mr. Curtis has a quarry in section 29 of the township just mentioned. 

 He finds a considerable market for the rock in Emporia, where it is 

 used for walling cellars and wells and for making other structures 

 for which large dimension stone is not required. 



Above limestone number 10 we found a thin system of shales 

 measuring about 40 feet in thickness. On top of this is limestone 

 system number ir, which is first seen on the hill-tops from four to 

 five miles northwest of Emporia. It is composed of two different 

 strata, each of which is less than 2 feet in thickness. They are sep- 

 arated by about 4 feet of shale, which is not represented in the drawing. 

 The lower stratum produces a 16-inch layer of solid white limestone, 

 which is extensively used for bridge building and other purposes. 



