GRUNDY COUNTY, 197 



FEET. IN. 



Blue clay and sandy shale, with ferns .... , 20 



Coal 3 



Soft black shale 6 to 8 



Fire clay, with rootlets 6 " 8 



Hard, sandy clay 8 



Fireclay , , 2 6 



At this place, the coal is about eight feet below the bed of the creek. 

 Near the water level, an offshoot from the main seam, about seven inches 

 thick, is exposed in the bank ; the shales immediately over it afforded a few 

 plants. 



Near the center of section 18, township 33 north, range 8 east, Mr. John 

 Holderman's artesian well has afforded the following section, kindly furnished 

 by Mr. A. J. Henry, who had charge of the boring : 



FEET. 



Gravel 15 



Sandstone 34 



Coal 3 



Sandy shale , 88 



Limestone 185 



It will be noticed that this section gives the sandstone as immediately over- 

 lying the coal. This condition of the seam has been elsewhere noticed, so far as 

 I can learn, only in a shaft recently sunk near the southeast corner of section 

 9 of the same township, and in one shaft in the adjoining part of Will county. 



Mr. Henry has also furnished me the section of the well bored by him at 

 the railroad station in Morris, from which an abundance of water is now 

 flowing, as follows : 



FEET. IN. 



Shale, with sandstone layers 63 



Coal 2 10 



Fire clay. 4 



Shales and clays 100 



Hard limestone, " Trenton." 200 



White sandstone, " St Peters." 37 



On the north side of the Illinois river, in the neighborhood of Morris, the 

 coal outcrops in the bank of the canal, and in the stretch of low land about 

 one mile to the northward. The overlying beds are here mostly blue clay 

 shales, with occasional irregular layers of sandstone. The iron nodules, above 

 mentioned, occur here at the same level, but not in so great numbers as at the 

 Mazon locality. The shales immediately above the coal frequently yield mag- 

 nificent specimens of fossil ferns and other plants. The following section of 

 the seam and its overlying beds was obtained at the shaft of Messrs. Symonds 

 & Jones, just south of the railroad station at Morris : 



