AGE OF THE KILLARNEY GRANITE. 
9 
well proven. With the immediate object of searching for such 
proof a visit was paid to the vicinity of Killarney. Killarney 
was selected for this purpose because the writings of earlier ob- 
servers in that locality (Murray 1849, Bell 1876, and Barlow 
1893) referred to a granite intrusive in sediments, the descriptions 
of which suggested the Bruce series although they had not been 
differentiated from the pre-Huronian sediments. 
GEOLOGICAL RELATIONSHIPS NEAR KILLARNEY. 
The time spent near Killarney was devoted altogether to 
reconnoitring the neighbourhood with the object of locating 
Huronian sediments which could be certainly recognized as 
such, and then determining the relation of these to the Killarney 
granite. No attempt was made to map all the rocks in the 
locality. 
A nearly complete sequence of the Bruce series was soon 
found in McGregor bay, on the large island immediately south 
of McGregor island (see Figure 1). The strata in this bay, as 
elsewhere in the neighbourhood, are nearly on edge and strike 
about north 75 degrees east. The southern part of McGregor 
island is underlain by a thick quartzite formation. Towards 
the south the quartzite is followed conformably by a dark boulder 
conglomerate about 150 feet thick. The conglomerate gives 
place abruptly but conformably to nearly 100 feet of siliceous 
limestone, which, in its turn, grades into dark, greenish grey- 
wacke, the weathered surface of which is peculiarly corrugated. 
The greywacke is several hundred feet thick and in its southerly 
portion becomes by degrees interbedded with quartzite, by which 
it is finally wholly replaced. This quartzite is also of important 
thickness. In the order given these formations agree closely 
with the upward succession of the Bruce series, that is, the 
quartzite on McGregor island corresponds to the Mississagi 
quartzite, the boulder conglomerate to the Bruce conglomerate, 
the limestone to the Bruce limestone, the greywacke to the 
Espanola greywacke and limestone, and the quartzite on the south 
to the Serpent quartzite. That the top of the sequence actually 
lies to the south in this place was confirmed by examining ripple- 
marks in the upper quartzite. 
