MEETINGS. 13 



Hint grains up to J of an inch in diameter. This would seem 

 to be a marine deposit probably occupying an inlet connected 

 with the Marais depression. It may be noted that the yellow 

 earth in the upper pit at the Brickfield is also underlaid by 

 sand. It does not, however, follow that the pit sand (which lies 

 at a higher level) is connected with or of the same origin as 

 that under the road. The Geological Section has not so far 

 been convinced that the sand in the upper pit is marine. 



4. — At the bottom of Guelles Road, an unexpected 

 deposit of sand and pebbles occurred. The sand arose from 

 decomposed rock, but was free from earthy particles and iron 

 stained. Some of the pebbles were five or six inches in 

 diameter, the material being diorite and gneiss. The deposit 

 was about 20 yards long and at least 9 feet deep, and was 

 well stratified. As it was not seen exposed by any member of 

 the Geological section, no positive opinion as to its nature can 

 be given, but from the description given and the appearance of 

 the material, it would seem to be an ancient high level beach. 

 The surface of the deposit was about 74 feet above mean sea 

 level. Various beaches of similar elevation will be found 

 recorded in these Transactions. 



B. — Yellow Earth or Sandy Loam. 



This was found in many spots. 



1. — At Petit Bouet, between Arculons lane and Orange- 

 vine, at least nine feet thick in some places, but lying in 

 irregular pockets. This deposit consisted of sandy and clayey 

 layers alternating. 



2. — Opposite Vrangue Brickfield, a deposit of yellow 

 earth was found underlaid by sand as above stated. This 

 deposit seems connected with that in the upper pit of the 

 brickfield. 



3. — A pocket ten or twelve feet deep near upper Vrangue 

 mill. 



4. — Another similar pocket a little to the east of the dip 

 in Rue des Thomas. 



ROCKS. 



Outcrops of undecomposed rock occur at Hougue-a-la- 

 Perre, the end of Ivy Castle Lane, the hill near Bouet Post 

 Office and near Caledonia Nursery. The three first belong 

 to the Hornblende gabbro variety, which was also met with in 

 Guelles Road. In all other parts the rock is decomposed, 

 especially in Rozel Road, St. Jacques, Gibauderie, Rocquettes 

 Road, also at Croutes and St. Stephen's Road. The rock is 

 chiefly diorite, of which undecomposed nodules frequently 



