14 IOWA ACADEMY OF SCIENCES. 



The following condensed statement of the Sioux City well is based upon notes 

 kept by the foreman, furnished me by Mr. J. C. C. Hoskins, and interpreted by 

 samples preserved by Mr. D. A. Magee, and submitted to my examination. The 

 mouth of the well is about thirty-eight ftet above the top of the sand rock exposed 

 by the river near by. 



Sixty-five feet — Soil and gravel. 



Twenty-five feet — Gravel. 



Fifty-four feet- Shale. (Benton.) 



One hundred and ninety-one feet — Sand and sandstone. (Dakota.) 



One hundred feet — " Chalk-rock." 



One hundred and ten feet — Gray limestone. 



One hundred and fitteen feet — Alternation of sand and gray limestones. Water 

 from near top of this rose to within twelve feet of the surface. 



One hundred and fifty feet— White and gray limestones. 



Four hundred and forty-five feet — Limestones and shales in thick layers, alter- 

 nating. 



Twenty feet — Red mass, five feet underlaid with sand. Water rises strongly to 

 surface from 1,250 feet. 



Forty-five feet— Sand and marl. 



One hundred and ninety feet— Hard " micaceous limestone and compressed 

 sandstone." 



Fifteen feet— Hard, brow^n rock; Sioux quartzite? 



Five hundred and fifty feet — Hard, gray granite, or gneiss, a five foot layer of 

 white limestone at 1,860. 



My knowledge of the Le Mars boring has been derived from communications 

 from Mr. Maurice Vincent, for a time resident of the place, and Mr. M. A, Moore, 

 who was largely interested in the enterprise. I have also examined samples from 

 various depths and visited the locality. 



Seven feet— Soil. 



Thirteen feet — Yellow clay. 



Forty-four feet— Blue clay. 



Twenty-seven feet — Sand and gravel, hardened above. (Tertiary?) 



Eight} -nine teet — " Soapstone and slate. (Niobrara?) 



One hundred and thirty-eight feet — Alternating strata of sandstone and clays, 

 some lignites. (Benton?) 



One hundred and forty-seven feet — Sandstone with some shale. (Dakota?) 



At 1,060 red rock 2-3 feet, from that to 1,400 gray granite with three 

 thin layers of white limestone in the upper part. 



What little I know of the Cherokee well was learned from Prof. G. W. Foster, 

 and specimens kindly saved for me oy Mr. A. Z. Wellman. 



It was bored in the center of the city of Cberokee and being out of the old 

 channel which had furnished a fine flow from moderate depth, a little noith, and 

 nearer the Little Sioux, it failed to strike any artesian water. 



After penetrating 400 feet of light blue limestone, at 700 feet it passed into blue 

 clay or soapstone, which continued to the bottom, 960 feet irom the surface. 



The Peterson boring was for coal. Mr. J. A. Kirchner, who had an interest, 

 gave me a record of the boring and specimens showing plant remains similar to 

 those at Sioux City and Ponca were scattered about the mouth of the shafc. 



Fifty-seven feet— Bouldery drift clay. 



Eighty-eight feet — Sandstone and shaly clay layers alternating with some 

 layers of lignite. The shaft was abandoned because of water. Veins of lignite 

 3-4 feet thick are said to have been passed through near the bottom of the shat't. 



