ROGERS, GEOLOGY OF THE CORTLANDT SERIES 



61 



ANALYSES. 



1. Granite, Cornell Dam Quarry. Analyst, Elwyn Waller. Privately com- 



municated by C. P. Berkey. Magmatic symbol, I. 4. 2. 4. Lassenose. 



2. Granite. Mohegan Quarry. Idem. Lassenose. (Near Toscanose.) 



3. Diorite, Buchanan. Analyst, G. S. Rogers. Symbol, III. 6. 3. 4. Limburgose. 



4. Gabbro, S. E. of Salt Hill. Analyst, H. T. Vulte. J. F. Kemp, Handbook of 



Rocks, 1908, p. 72, No. 3. Symbol, II. 5. 3. 3. Shoshonose. 



5. Norite proper, l£ miles S. of Peekskill. Analyst, G. S. Rogers. Symbol, II. 



5. 3. 4. Andose. 



6. Biotite Norite, 2 miles E. of Montrose Point. Analyst, G. S. Rogers. Symbol, 



II. 5. 4. 3. Hessose. 



7. Biotite Augite Norite, Montrose Point. Analyst, M. S. Munn. J. D. Dana. 



Amer. Jour. Sci. (3), XXII, 104. Symbol, II. 5. 3. 4. Andose. 



Modes. 



