7i 



— 



No. 4. 



No. 5. 



No. 6. 



No. 7. 



No. 8. 



Si0 2 



Ti0 2 



AI2O3 



Fe203 



FeO 



MnO 



50-00 



0-82 



18-84 

 2-57 

 5-5i 

 0-08 



10-65 



4-63 

 1 -18 

 4-46 

 o- 10 



0- 10 



0-03 



48-81 

 0-74 



16-62 

 1-17 



7-47 

 o- 12 

 10-30 

 8-28 

 0-76 

 3-3i 

 o-55 

 0-03 

 0-06 



50-86 



15-72 

 9-77 



2-48 



50-73 

 i-59 



19-99 

 3- 20 

 4-66 

 0-05 

 8-55 

 3-48 

 1-89 

 4-03 



48-85 

 2-47 



19-38 

 4-29 



4-94 

 o- 19 



7-98 



2- OO 



1-91 



5-44 



CaO 



MgO 

 K2O 

 Na 2 

 C0 2 



10-52 



3-55 

 0-90 



3-89 



CI 







not det. 



s 









P 2 Os 





o-8i 

 0-77 



1-23 

 o-68 



H 2 



I -00 



o-95 



2-53 





99-97 



99-17 



IOO -22 



ioo- 13* 



99-36 



"Including BaO 0-27. 



No. 4. Amphibolite resulting from the alteration of 

 limestone — Maxwell's Crossing, Lot 5, Range VI, Township 

 of Glamorgan, Ontario. 



No. 5. Dyke cutting limestone — Lot 27, Range VIII, 

 Township of Methuen, Ontario. 



No. 6. Gabbro, near Baptism river, Minnesota, U.S.A. 

 (Wadsworth, Geol. Survey of Minn., 2 p. 79, 1887). 



No. 7. Diorite — Big Timber creek, Crazy mountain, 

 Montana (Wolff, Bull. U.S.G.S., 148, p. 144, 1897). 



No. 8. Normal essexite — Mount Johnson, Quebec 

 (Adams, Jour, of Geol., April-May, 1903.) 



In connection with this alteration of limestone to 

 amphibolite it is to be noted that the change is not one of 

 solution or digestion of the limestone by the granite, for 

 the fragments preserve their sharp and well-defined forms 

 even when the alteration is complete. 



The limestone, at a distance from the granite, is a 

 white crystalline marble, containing scarcely any impurities 

 and effervescing freely in fragments with cold dilute 

 hydrochloric acid, showing that it is an essentially pure 

 carbonate of lime. 



