30 



PKOE. T. G. BONNET ON THE 



[Feb. 1896, 



near the White Rock, a little above sea-level, and the projection with 

 bent bands (fig. 8) 



occurred, like those Fig. 6. — Serpentine and banded granulite, 

 above, in Polbarrow Enys Head. 



Cove. 1 I have, in- 

 deed, sketches and 

 notes of not a few 

 similar cases in my 

 journal, but forbear 

 to multiply like figures 

 and statements. I 

 must, however, once 

 more refer 2 to the 

 remarkable mass in 

 the quarry at Kildown 

 Point, which again 

 has been most care- 

 fully studied. Before the excavation was made, it must have been 

 wholly or almost wholly enclosed in the serpentine. That rock 

 still rests in places on the top ; 

 it forms one or two small tongues 

 between the bands of granulite, 

 and a blunt lobe at the base of 

 the southern side, where some of 

 these bands are bent and inter- 

 cepted. Yet in the immediate 

 neighbourhood of this mass the 

 serpentine does not show the 

 slightest sign of crushing ; it is in 

 a perfectly normal condition, while 

 that in the lobe, though rotten, 

 exhibits a slightly streaked or foliated structure, which, however, 

 makes a high angle with the horizon, though the bands in the granu- 

 lite are inclined at a low angle to 

 the same. But this is not all 

 the evidence. Masses of granu- 



Pig. 7. — Serpentine and banded 

 granulite, Enys Head. 



lite appear to crop out from the 

 serpentine on the almost pre- 

 cipitous slope below the quarry. 

 The descent of this would be so 

 hazardous that I have never made 

 the attempt ; but this year I 

 managed to land from a boat in 

 a little cove at the base of the 

 cliff. Here we find granulite 



Pig. 8. — Serpentine and banded 

 granulite, Polbarrow Gove. 



v.,/,:- 



1 Compare also the projecting mass of granulite in the included mass east of 

 the Lion Bock (fig. 3, p. 27), and note the outlines of the granulitic part and of 

 the micaceous bands. 



2 Quart. Journ. Geol. Soc. vol. xlvii. (1891) p. 469 ; see also vol. xxxiii. 

 (1877) p. 899. 



