FULTON COUNTY. 



93 



within the county, and all, except the upper one, have been worked to a greater 

 or less extent. The aggregate thickness of these seams is about twenty-five 

 feet, and their individual range is from twenty inches to six feet in thickness. 

 The three lower seams outcrop in the southern and western portions of the 

 county, especially along the bluffs of Spoon river, and as the general dip of the 

 strata is to the eastward, they pass below the level of the Illinois river, and are, 

 therefore, not seen on the eastern borders of the county. The upper seams 

 underlie nearly all the central and eastern portions of the county, and one of 

 them, No. 4, is found south of Spoon river, underlying the high lands in the 

 vicinity of Astoria. The following section, compiled from careful measure- 

 ments made at the outcrops seen in various portions of the county, will show 

 the relative position of these coals with each other, and the character and thick- 

 ness of the strata with which they are associated : 



Section of the Coal Measures in Fulton County: 



4 to G feet. Thin bedded gray limestone. 



15 to 20 feet. 



37 feet. 



3 to 5 feet. 



5 to 10 feet. 



15 to 20 feet. 



2 to 3 feet 



25 to 30 feet. 



2 to 6 feet. 



Shales but partially exposed. 

 Coal seam No. T. 



Shale and shaly sandstone. 



Argillaceous limestone and bltumiuou* shale, 

 Coal seam No. 6. 



Fire clay and nodular limestone. 

 Sandstone and shale. 



Black shale and nodules of limestone. 

 Coal seam No. 5. 



Sandy and argillaceous shales. 



Bituminous shale and limestone. 

 Coal seam No. 4. 



3 to 6 feet. Clay shale and septaria. 



GO to SO feet. 



Sandstones and sandy shales. 



