West of the Alleghany Mountains. 



229 



The discrepancy between the two Ohio sections will be 

 discussed in another portion of the paper. 



Taking Coal VIII of the Ohio section as our basis, we 

 have a definite starting point, as that is the Pittsburg.^ VIII a 

 is present at Wheeling ; does not appear at Wheeling creek, 

 owing probably to imperfect exposure, but reappears on the 

 east side as the Redstone. VIII b is seen in all the sections 



