1C, ECONOMICAL GEOLOGY. 



Ft, In. 



No. 34. Limestone C2 4 



. Sandstone 8 



No. 36. Gray limestone ' 



No. 37. Sandstone 2 



No. 38. Limestone 2 3 



No. 39. Sandstone ia 



No. 40. Drub clay shale < 6 



No. 41. Sandyshale 5 3 



No. 42. Shaly limestone 4 1 



No. 43. Quartzband 4 



No. 44. Shaly limestone 3 8 



No. 45. Clay shale 6 



No. 45. Shaly limestone 16 9 



No. 47. Yellow flint band 1 



No. 48. Clayshale 3 7 



No. 49. Hard gray limestone 4 I 



No. 50. Shaly limestone 6 2 



No. 51. Shale with bryozoans 2 2 



No. 52. Shaly limestone 4 7 



449 6 



The coal from No. 8 of this boring appeared to be of excellent 

 quality, and if the roof proves to be sufficiently firm, the seam can 

 be worked to good advantage. Nos. 16 to 24 represent the horizon 

 of coal No. 1, divided here into five thin seams of only a few inches 

 in thickness, and too thin in the aggregate to be of any practical 

 value. 



The base of the Coal Measures is probably the hard silicious rock 

 No. 30, while Nos. 31 to 39 represent the St. Louis and Warsaw 

 beds, and all below and including No. 40 belong to the Keokuk 

 limestone. 



An unsuccessful attempt to obtain coal was made at Farmer City, 

 by sinking a shaft to the depth of 163 feet without reaching bed- 

 rock, and then boring to the depth of about 813 feet below the 

 bottom of the shaft, making a total depth of 476 feet. For the 

 details of this boring I am indebted to Mr. Sowdon, under whose 

 supervision it was made. 



Ft. In. 



Shaft 163 



Blue clay 7 



Hardpan 18 



Clay shale 2 



Sandstone . 4 5 



Clay shale 4G 3 



Black shale 2 4 



Coal . 1 e 



Fire c-lay 8 10 



Gray sandstone 3 10 



Clay shale 2 1 



