WOODFORD COUNTY. 337 



fuel. It might, however, be used as a fertilizer, and where it crops out so as 

 to be readily obtainable, may prove of value. The material of both beds has 

 the odor of well decayed manure.* 



No. 7 resembles the ordinary blue clays of the Drift period. I am indebted 

 to Mr. Wm. Rice, who resides in the neighborhood, for assistance in examin- 

 ing these beds. The peaty layers have been examined, for some distance, by 

 him. 



A bed of light colored sand, of considerable extent and thickness, is reported 

 to lie in the Illinois bluffs in the northern part of township 28, range 3 west. 

 It is said to be too fine to make good mortar, and may prove valuable for glass 

 making. 



Boulders of various kinds, and varying from a few inches to several feet in 

 diameter, are found in the Drift. They consist of granite, syenite, porphyry, 

 trap, hornblende, quartz, limestone, etc., and occasionally a specimen of native 

 copper. 



Coal Measures. All the stratified rocks exposed in Woodford county, belong 

 to the Coal Measures, and they crop out in but very few places. In section 1 , 

 township 27, range 3 west, about four miles northwest of Metamora, some beds 

 of limestone are exposed, for a short distance on Partridge creek. The upper 

 layer is a compact rock, and makes a good building material, but only about 

 three feet in thickness of this was to be seen. The only fossils I obtained from 

 it were, Productus longispinus, and Atliyris subtilita. The lower rock is of poorer 

 quality, and breaks badly on being quarried. From this I obtained a large 

 Aviculopecten, species not known. 



Near to this, a shaft has been sunk over one hundred and thirty feet, and a 

 boring was made nearly eighty feet further. The shaft is located at the foot 

 of the bluff, which is some sixty or eighty feet high. The rocks penetrated 

 give the following section : 



FEET. IN. 



1. Drift 5 6 



2. Clay shale 19 



3. Sandstone , 6 



4. Clay shale ..-, 4 



5. Sandstone , 7 6 



6. Clay shale , 4 6 



7. Sandstone 1 



8. Slate 5 



9. Coal 1 



*These beds are, undoubtedly, the equivalents of similar strata passed through in the shafts 

 at Bloomington, at a depth of about two hundred to two hundred and fifty feet below the sur- 

 face, and being entirely below the true boulder clay, or Drift proper, they may be considered 

 as stratified Post Tertiary deposits, representing the ancient soils and surface conditions, that 

 obtained anterior to the Drift epoch. A. H. W. 



43 



