CATSKILL DIVISION. 

 View of the Head of the Gorge at Summit. 



187 



V. CATSKILL DIVISION; 

 OR OLD RED SANDSTONE OF THE NEW-YORK REPORTS. 



DEVONIAN SYSTEM (iN PARt) OF ENGLISH AUTHORS. 



So f;ir as agriculture depends on the composition of tlic soil, the separation of the rocks 

 below the Tully limestone, from those above, is of but little consequence. There is 

 throughout a great preponderance of sand in these rocks; but tliis element is modified hv 

 alumine, even in the thick-bedded sandstones, and more especially in the thin beds of 

 shales and slates with which the beds of sandstone alternate, 



24* 



