284 



NOTES ON GEOLOGICAL RESULTS. 



Mr. Hill refers to this inclusion in these words : " I found 

 a piece of what seemed to he gneiss imbedded in it " (the long- 

 grain). When examining the rock I saw the piece but I did 

 not recall to my mind Mr. Hill's observation, and after 

 examining the embedded piece I called the attention of 

 the members to it, believing it to be syenite. The point is one 

 of interest as, if it is different from the local rock, it must 

 have been torn from lower rocks. 



One feature I call attention to is the fact that an 

 inclusion of acid rock (whether granite or syenite I could not 

 determine, not being able to obtain a specimen), quite distinct 

 from the gneiss of the locality was found. This must have 

 been introduced from below the gneiss by the intruding green- 

 stone. 



There was a peculiarity which might easily have con- 

 siderably altered the character of the bay. The almost black 

 long-grain rock stretched right across the bay from point 

 to point, and had it not been associated with softer rocks and 

 thus lost its support, the bay Avould have been closed by a 

 wall open below by the action of the sea and probably forming 

 a kind of Creux. 



Another very interesting feature of the bay is the 

 numerous " pot holes " in the softer greenstone rock. 



The bed lies under the cliff, and pieces of harder stone 

 have fallen on it. There the sea and wave action have 

 enabled the hard rocks to wear away the dyke into a nearly 

 flat surface and then into numerous holes, the stones which 

 have fallen having also been worn into globular shapes. 



One of these holes is a kind of " Venus' Bath " and offers 

 a chance (taken by two of our members) of a glorious bath on 

 a hot day. The water is four to five feet deep and the pond 

 is an oval cavity of about twenty by ten feet in size. All 

 around are holes in all stages of erosion, one of which may be 

 described as a perfect hemisphere, hollow and smooth. Inside 

 it was a globe of stone, nearly as perfect in shape as a school 

 globe and of some 8 inches in diameter. 



On the occasion of the motor-boat excursion the green- 

 stone dykes were noted to occur all the way to Pleinmost 

 Point, most of the caves and gullies marking the places where 

 this rock had been washed away and giving rise to the 

 openings in the cliffs and to the coves. 



In one place, to the east of the natural arch to the east 

 of Les Tielles, I noticed that two dykes of different 

 appearances laid conformably on eaeh other. I think that if 

 the upper one (the beds were horizontal) which weathers 



