82 



ME. C. E. TILLET OX THE CtEAXITE-GXKISSES [yo\. Ixxvii, 



(see fig. 2), The intricate foliation of the acid gneiss is faith- 

 fully followed by the plastic amphibolite. This structure is not 

 to be interpreted as a case of the intrusion of a heterogeneous 

 magma, in which the basic band represents a liquid layer conforming 

 to the intricate foliation. The significance of this point will be 

 dealt with in the discussion of the origin of the amphibolites. 



Fig. 2. — Therman y-meta morjplwsed hasic ijich'sion. (Ircifn out 

 into a Tibhon-liTce hand, and contorted witli the jlov:ing 

 movement in tlie magma. Point Soston. 



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The disi-uj^tion of the amphibolites into numerous smaller in- 

 clusions can be adequately traced on the rock-sui-faces exposed to 

 view along the coastline between low- and high- water mark. The 

 m.asses are broken up by veins of the gneiss, and the remains of an 

 amphibolite inclusion maybe traced in the small angular fragments 

 separated by Teinlets of the enclosing gneiss (Hg. 3, p. S3). 

 AYhere foliation of the amphibolite-band has been pronounced, the 

 influence of the invadino- solutions has been such that an intimate 



