REPORT OF THE CHIEF ASTRONOMER 

 SESSIONAL PAPER No. 25a 



465 



perthite by orthoclase; so that this granite is a normal biotite granite rather 

 than a soda granite. The greater homogeneity of the dominant feldspar may 

 explain the fact that the Park granite is somewhat more resistant to the weather 

 than the Older phase of the Cathedral batholith. A few prisms of dark green 

 hornblende are accessory in much the same proportion as in the Younger phase 



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Figcbe 33.— Map showing relations of the Remrnel batholith, Park granite, and Basic 

 Complex. Scale :— 1 : 110,000. 



of the Cathedral. With these exceptions, both essential and accessory constitu- 

 ents are, in individual properties and in relative amounts, practically identical 

 in the type specimens of stock and the Older phase of the batholith. The specific 

 gravity of the Park granite is 2-673. 



A second, very small boss of the Park granite occurs within the mass of 

 the Remmel batholith some 5 miles west-southwest of the Park granite stock. 

 This boss is circular in plan and measures not more than 250 yards in diameter. 

 25 a— vol. ii— 30 



