A CONTRIBUTION TO THE GEOLOGY OF SOUTHERN MAINE 543 



Table VIII — Continued. 

 Analyses and Molecular Proportions of Monzonites 



Norms. 



I. 



II. 



III. 



Or 



32.80 



Or 



39-47 



Or 





22.24 



Ab 



17.81 



Ab 



27.77 



Ab 





48.40 



An 



22.24 



An 



5-84 



An 





3.06 



C 



•31 

















Di 



7.06 



Di 





5-83 



Hy 



15-55 



Hy 



13-47 



Hy 





i5-8o 



01 



2-34 



11 



3-85 



11 





3-54 



11 



4-31 



Mg 



.46 



Mg 





.70 



Ap 



1.96 



Ap 



•13 



Ap 





2-33 



I. Monzonite from Campbell Pond, Maine. Position in the quantitative 



system II. 5.3.4. Lincolnose. 



II. Schist. Analyses I and II of Table VII combined in the proportions 



of 2 : 3. Position in the quantitative system II. 5.2.3. Monzonose. 



III. Monzonite from South Newcastle, Maine. Position in the quantitive 



system II. 5.1.4. Umptekose. 



This group of rocks presents similarities to the shonkinites, 

 yogoites and monzonites of the Bearpaw and Little Belt 

 Mountains, and with the prowersose of Two Buttes, Col. It also 

 has affinities with the ciminites and vulsinites of Italy. It has 

 no close allies near at hand, except the prowersose described by 

 Bastin, which is probably part of the same rock-body. 



The similarity with the distant rocks is chemical only. The 

 other types are unmetamorphic and in some cases surface 

 volcanics. The Maine rocks are evidently of deep-seated origin, 

 and highly metamorphic, the resulting mineralogy and structure 

 departing widely from those of the allied types. The mode 

 departs widely from the norm for the same reason, namely that 

 the minerals actually present are in large part the result of 

 dynamic processes, and are in general those of higher specific 

 gravity than the normative ones. 



THE ■ SALFEMANES. 



Meta-auvergnose. III. 5. 4. 3. Hornblende Schist. Occur- 

 rence. — Hornblende schists are common on the coast of Maine and 

 common also on the Boothbay quadrangle. They are involved 



