CATSKILL DIVISION, 
View of the Head of the Gorge at Summit. 
V. CATSKILL DIVISION ; 
OR OLD RED SANDSTONE OF THE NEW-YORK REPORTS. 
DEVONIAN SYSTEM (iN PART) OF ENGLISH AUTHORS. 
So far as agriculture depends on the composition of the 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 this element is modified by 
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* 
