Phenomena of Granite Veins. 



487 



ection of granitic materials through amass of granite whil< 



by the inj 



vet in a mastic state 



(22) Granite Veins in Granite ; Whatley 



In No. 23 a coarse vein, made up almost entirely of feldspar, 20 

 inches wide, traverses a rather coarse granite. This vein has been 

 cut off by a fissure crossing it nearly at right angles, and the two 

 parts are separated seven feet. This lateral movement must have ta- 

 ken place after the consolidation of the rock. The case occurs in the 

 extreme southeast part of Newport, R. Island. 



(24) Granite Veins in Granite ; Gay Head. 

 (23) Granite Vein in Granite ;Newport, R. I. 



No. 24 represents an enormous bowlder of granite, from 20 to 30 

 feet diameter, lying at the foot of the clay cliff at Gay Head, Martha's 

 Vineyard, a, b, c, are granite veins of the same epoch ; as is proved 

 by their parallelism. These are all cut off by a vein d t of subse- 



