T. 8. Hunt—The Decay of Rocks. 199 
which has escaped the action that denuded ani striated the sur- 
face of the other parts of the mountain. 
Numerous examples of similar remaining portions of 
decayed feldspathic rock have been observed farther southward, 
s in northwestern Connecticut (described in § 7), and among 
the Laurentian rocks of the South Mountain in Pennsylvania, 
n another example in the same region, about two miles south 
“bowlders of decomposition,” from t to twelve inches in 
diameter, consisting of undecayed gneiss, the laminated struc- 
ture which was clearly continuous wi at seen in the 
since noticed the decay of the Montalban rocks near Atlanta in 
eorgia, where, with local exceptions of undecaye areas (as 
aaa ay 1. 5 p. 250.5 
