THE PERMIAN SYSTEM IN KANSAS. 45 



and Mr. Fares informed the writer that when fires were 

 made in a fire-place that was built of it, the stone began to 

 "pop" and crack in pieces, showing its unfitness for use 

 where it would be subjected to much heat. From the skirt 

 of Mount Prospect and the region of the junction of Hack- 

 berry and Bluff creeks, the exposures of the Day Creek 

 dolomite extend almost uninterruptedly westward, past East 

 and West Bear creeks, including the vicinity of the Fares 

 place, to Little Sand creek, west of which they are less 

 continuous. The formation appears, however, in the ravine 

 that heads just west of Little basin, and it seems probable 

 that the ledges recorded (I.e., page 142) by Professor St. 

 John "on Gjpsum creek a few miles above Cash City, on 

 the borders of Clark and Meade counties," as well as a less 

 characteristic ledge which the writer recently observed on 

 Crooked creek near the present location of Odee postoffice, 

 should be referred to the Day Creek formation. A num- 

 ber of years ago, the writer observed a stratum of dolomite 

 capping the so-called Centennial mound* on the old trail 

 from Kinsley to the Salt plain, in what is now Woodward 

 county, Oklahoma. Some of the field-notes of that 

 reconnaissance have been lost; but if it be remembered 

 correctly, this Centennial mound dolomite was correlated 

 with that which is here called the Day Creek. 



At one locality in Clark county, a point on the Little 

 Sand creek drainage passed by the road from the Fares 

 ranch to "St. Jacob's well," the Day Creek stratum presents 

 a peculiar variation . It there becomes a homogeneous, semi- 

 translucent white rock of remarkably pure aspect, unlike 

 any other rock with which the writer is acquainted, but 

 bearing more or less resemblance to fine-grained mar- 

 ble, or to onyx or chalcedony. In honor of Mr. Henry 

 Fares, formerly of the Fares ranch, to whom the writer is 

 indebted for most enthusiastic and valuable assistance in 



*Forraerly called Sentinel mound? 



