04 



FKOSTBURG COAL FORMATION. 



the sandstone (No. 1,) in situ about 500 feet above the creek, 

 and 1300 feet above the estimated inferior limits of the series, 

 it is succeeded at 467 feet as follows : 



No. Thickness. Name. 



2. 1.5 ft. Shale. 



3. 2. Coal. 



4. 31. Slate. 

 6. 18. Slate. 



6. 4. Coal. 



7. 6. Sandstone, (fine grained.) 



8. 41. A covering of detritus, containing fragments of 



limestone, slate and sandstone. It is believed 

 that one of the six feet beds of limestone which 

 have been opened in the vicinity, in the same 

 relative position exists here. 



Coal. 



Similar to No. 41. Slates and slaty sandstones 

 appeared where the strata which had not suf- 

 fered disintegration were reached. 



Hard sandstone. 



Slate. 



Shale. 



Coal. 



Shale. 



Coal. 



Shale, containing vegetable impressions. 



Coal, (the principal bed.) 



Shale. 



Clay containing nodules of iron ore. 



Slate. 



Sandstone, (exclusively siliceous.) 



Clay. 



Sandstone, (fine grained.) 



Nodular iron ore in clay. 



Detritus, except in the lower part, where fine 

 grain sandstone appears in situ. 



Iron ore stratified sp. gr. 2.946. 



Coal, (called the 8 feet bed.) 



Shale. 



