378 



J. F. KEMP — GRANITES OF ATLANTIC COAST 



based on the statistics of the Tenth Census and on several papers which 

 have appeared since 18S5 and which are cited in the foot-notes : 





I. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



IX. 



X. 



Maine .... 



56 



17 

 9 

 9 

 6 

 6 



"i 



5 

 6 



2 



2 

 1 

 1 



1 



2 



7 



17 

 3 

 2 

 2 



I 

 2 



2 

 5 



1 

 5 











New Hampshire. 

 Vermont 



1 

 1 



2 









, 



Connecticut 



1 

 3 



8 

 2 











Massachusetts. . . 



6 







1 

 1 





Rhode Island. . . 









New York 







3 



1 





1 



Pennsylvania . . . 



Maryland 



Virginia 



i 

 1 



2 



2 









9. 



1 







5 











Georgia 







1 





























Totals ... 



115 



15 



35 



9 



21 



13 



2 



7 



2 



3 



Of North Carolina and South Carolina no statistics are available. 



I, biotite-granite ; II, biotite-gneiss ; III, muscovite-biotite-granite ; IV, musco- 

 vite-biotite-gneiss ; V, biotite-horn blende-granite or gneiss ; VI, hornblende-gran- 

 ite ; VII, muscovite-granite ; VIII, biotite-epidote-granite or gneiss ; IX, epidote- 

 granite ; X, hornblende-gneiss. 



K survey of these figures brings out strong!}^ the great preponderance 

 of tlie biotite-granites over tlie otliers, and if to the total for the biotite- 

 granites we add also the totals for the biotite-gneisses, the muscovite- 

 biotite-granites and gneisses, and the biotite-epidote-granite or gneiss, a 

 procedure that is practically justifial)le, the conclusion is emphasized 

 the more strongly. In fact the occurrence of other granites makes one 

 suspect that more or less abnormal rock-types are present and to infer 

 peculiar conditions. This last feature will be further commented on in 

 the remarks on the several provinces or states which are given below. 



REVIEW BY PROVINCES OR STATES 



New Brunswick. — Data are not at hand for detailed statistics of New 

 Brunswick, but biotite-granites are not lacking. In addition, W. D. 

 Matthew * has described a dioritic granite from Saint John. It is in 

 close association with gabbro, possibly as a local differentiation product 

 from a single parent magma. Geological descriptions of other areas have 

 been prepared bj^ L. W. Bailej^ and G. F. Matthew.f and by G. F. Mat- 

 thew alone.J 



* W. p. Matthew : The intrusive rocks near Saint John, New Bruasvvi(i 

 of Sciences, vol. xiii, 1894, p. 185. 

 theological Survey of Canada, 1S70-'71, p. 180. 

 tldem., 1876-'77, p. 345. 



Trans. X. Y. .\cailemv 



