DIFFERENTIATION OF THE SYENITE-GRANITE MAGMA 251 



1. Basic syenite (andose near shoshonose) from near Raquette Falls. E. W. 

 Morley, analyst. Described by H. P. Gushing, New York State Museum Bul- 

 letin 115, pages 513-514. 



2. Augite-syenite (harzose), 3% miles north of Tupper Lake Junction. E. W. 

 Morley, analyst. Described by H. P. Gushing, New York State Museum Bul- 

 letin 115, pages 514 and 516. 



3. Augite-syenite (adamellose). Ticonderoga, Essex, Gounty. M. K. Adams, 

 analyst. Described by J. F. Kemp, New York State Museum Bulletin 138, 

 pages 45-46. 



4. Augite-syenite (pulaskose). Loon Lake. Franklin Gounty. E. W. Morley, 

 analyst. Described by H. P. Gushing, Geological Society of America Bulletin, 

 volume 10, pages 177-192. 



5. Syenite (adamellose). Whitehall, New York. W. F. Hillebrand, analyst. 

 Described by J. F. Kemp, New York State Museum Bulletin 138, pages 45-46. 



6. Quartz-hornblende syenite (adamellose). One mile northwest of North- 

 ville. E. W. Morley, analyst. Described by W. J. Miller, New York State 

 Museum Bulletin 153, pages 14-17. 



7. Augite-syenite (toscanose). Little Falls, New York. E. W. Morley, 

 analyst. Described by H. P. Gushing, New York State Museum Bulletin 115, 

 pages 514-515 and page 518. 



8. Quartz-syenite (toscanose). Two and one-half miles south of Willis 

 Pond, Altamont, Franklin Gounty. E. W. Morley, analyst. Described by H. P. 

 Gushing, New York State Museum Bulletin 115, pages 514 and 519. 



9. Laurentian granite (toscanose). Two miles east of Theresa. E. W. 

 Morley, analyst. Described by H. P. Gushing, New York State Museum Bulle- 

 tin 145, pages 176-177. 



10. Biotite-granite porphyry (toscanose). One and three-fourths miles north- 

 northwest of Northville. E. W. Morley, analyst. Described by W. J. Miller, 

 New York State Museum Bulletin 153, pages 17-20. 



11. Laurentian granite (toscanose). One-fourth of a mile south of Alex- 

 andria Bay. E. W. Morley, analyst. Described by H. P. Gushing, New York 

 State Museum Bulletin 145, pages 176-177. 



;. i'l ' : 



Considering the pronounced textural and miner alogical variations of 

 these rocks and their wide distribution in the Adirondack region, they 

 show decidedly close chemical relationships as indicated by their posi- 

 tions in the quantitative system. Thus, while some are persalanes and 

 some dosalanes, this difference is very largely due simply to the variations 

 in quartz and feldspar contents and, even so, several of the rocks are 

 close to the border between the two classes. In their respective classes 

 all these rocks fall in order 4 or 5, rang 2 or 3, and subrang 3 or 4. Such 

 close chemical relationships of the members of the great syenite-granite 

 series strongly corroborates the conclusion reached by field and micro- 

 scopical study, that the syenite-granite series represents a single great 

 intrusive body. 



