NOVA SCOTIA GEOLOGY — HONEYMAN. 331 
this side of the harbour, in all their windings and dovetailings, 
into the granite, and defined them on the Admiralty Charts of 
Halifax harbour, years ago. Here the granites are strikingly 
porphyritic ; these are roches moutoneés. The ruts in these indi- 
cate transportation and its direction. The deep ruts only sur- 
vive; air, ice and water have so affected the material of the rock 
as to efface fine striation. Coming to a cross road, we turned to 
the right and at length reached the “ Rocking Stone.” Not being 
altogether satisfied, I returned to the N. W. Arm the succeeding 
Saturday and continued the westerly course beyond the bridge, 
going along the St. Margaret’s Bay road. Rocks outcropping on 
the right side are gnessoid. I found one beautiful syenitic 
gneiss boulder on the road. This is the only one that I have 
seen west of H. M. Dockyard. Drift cuttings are observed with- 
out noteworthy boulders. Approaching the Halifax water works 
the granites which extend south to the Atlantic coast came for- 
ward tothe road. They are seen in conjunction with the gnes- 
soid rocks. At adistance of four telegraph poles beyond the 
four mile post, a gnessiod rock is seen on the left side of the 
road, scooped out, with striation on the side of the scooping. 
The position of the striation and the ferruginous character of the 
rock, made it impossible to observe the course accurately with 
the compass. It seemed to be about S. 20 E., N. 20 W., mag. A 
large granite boulder rested above. The granite here is not por- 
phyritic as that in the vicinity of the Rocking Stone ; the con- 
stituent minerals are the same. This is granite transportation 
No. 3. The amygdaloidal and syenitic transportation, which Mr. 
Hare reports on the north, seems to have been intercepted. 
—Paper by Mr. Hare, Transactions, 1879-80. 
CENE. 
In the lake at the Halifax water works, Mr. Keating, the City 
Engineer, reports the existence of an argillaceous deposit, which 
is largely composed of diatoms. Its thickness is about 6 feet. 
(To be continued.) 
