ox Tin: CRYSTALLINK ROCKS OF TlIK LIZ.VKD DlSTllICT. 



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times apparently twistinj^j up the raf^j^ccl ends into dykc-liko masses, 

 sometimes porliaps breaking off and carryini^;; up liugo fragments. 

 Hero a dyke of serpentine parts two masses of granulitic rock, the 

 outer margins of each being in contact with serpentine, which con- 

 tinues for some distance ; there a tongue of serpentine is forced like 

 a wedgo into a banded mass of the granulitic rock, or is protruded 

 between two of the layers. Here, in a similar mass, the bands are 

 nipped up or cut off obliquely by the serpentine (fig. 1) ; there, in 



Fig. 1. — Section in Quarry near Kildown Point. 



1. Serpentine. 



2. Reddish granitoid rock, with dark bands (Granulitic Group). 



one of less regular structure, the granitic veins may be seen to run 

 up to the serpentine, and be, as it were, cut off by it (fig. 2). So 

 far as structure goes, the relations of the Granulitic Group and the 

 serpentine are identical with those which are exhibited by banded 

 gneisses or schists, and granites intrusive into them. 



Fig. 2. — Section near Cavour/a Roclcs. 



1. Serpentine. 



2. Granulitic Group. The darker part represents the dioritic, tlie lighter 



the granitic rock. 



The serpentine, in the tongues, and near the granulitic rock 

 generally, exhibits little indication of having been crushed : though 

 now and then a faint resemblance to a foliation — recalling to some 



