ROCKS OFF THE LIZARD, 



313 



south-west extremity of these ledges shows a fine granulitic rock 

 approaching the '* Wiltsliire " type. 



Fig. 0. — Southern Dijlce in " Quadrant " Island, faulted on north- 

 west side of extreme summit. 



The " Wiltshire " Rock is accessible from the mainland at dead 

 low water. This and the surrounding rocks are composed of a light- 

 banded granulitic gneiss with sundry exposures of basic porphyritic 

 rocks in their immediate vicinity. The strike of these " Wiltshire 

 rocks" appears to be north of east and south of west with a 

 southerly dip. 



" Shag Eock " is partially gneissic. " Men Par " is an isolated 

 rock of coarse gneiss 450 yards south of Pistil Ogo. 



The *' Clidgas " are a group of three rocks from 650 to 800 yards 

 south of Pistil Ogo. The inner of these, marked No. 1 on the map, 

 is traversed by two almost parallel basic dykes with crystals of fel- 

 spar scattered sparingly through their ground-mass. These dykes 

 are from 18 inches to 24 inches wide, running N.N.E. and S.S.W. 

 with an E.S.E. dip of about 50°. These three rocks are all com- 

 prised of coarse gneiss. 



" Men Hyr " and " Vasiler " are about 900 yards due south of 

 Polpeor Cove, and are both composed of typically coarse gneiss. 



" Pen Ervan " is a boss of somewhat coarse gneiss, with a band of 

 softer micaceous rock at its extreme base on the west. 



•' Enoch Rock," or " St. Enoch, " as the fishermen call it, and the 

 Q.J.G. S. No. 174. T 



