CATSKILL DIVISION. 

 I'u to of the Head of the Gorge at Summit. 



187 



V. CATSKILL DIVISION ; 

 OR OLD RED SANDSTONE OF THE NEW- YORK REPORTS. 



DEVONIAN. SYSTEM (IX 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* 



