DALY: GEOLOGY OF THE NORTHEAST COAST OF LABRADOR. 215 



the granitite contact, is replaced by a band of metamorpbic sandstone. 

 The structural features are here identical with those of the conglomerate. 

 Part of the cement of both rocks is made up of epidote, which colors the 

 rock an intense green, especially marked where myriads of epidote 

 crystals have formed along the joint-planes. 



The limited time at our disposal, the extensive covering of elevated 

 beach deposits and of land-wash at the inner edge of the bench, and, in 

 an important degree, the disturbing influence of clouds of mosquitoes, 

 prevented the discovery of the actual contact between sandstones and 

 granitite. The granitite^pebbles in the conglomerate are very similar in 

 character to the rock of the great ridge and suggest that they were 

 derived from it. The deformation of the conglomerate is represented in 

 the granitite by the appearance, especially near the contact, of a schistose 

 structure, with a trend common to that of the conglomerate ; the two 

 rocks have evidently been squeezed together. 



A sharp lookout was kept for fossiliferous bands, but no organic remains 

 were discovered. Thus no conclusion could be made as to the age of 

 the sediments. They have a close superficial resemblance to the 

 Archaean metamoi-phic conglomerate series of Finland which the writer 

 had already seen in the field. These Labrador sediments are cut by 

 diorite, granite porphyry and diabase dikes and by many pegmatite and 

 quartz veins. 



Sedimentary rocks in Aillik Bay. — Aillik Bay opens at a point about 

 fifteen miles northwest of Pomiadluk Point. It is a picturesque inlet 

 some five miles in length and three-quarters of a mile in width. Its axis 

 is directed north and south. The bay is rimmed about with massive 

 rocks; diorites cut by granite porphyry dikes on the west; diorite intru- 

 sive into amphibolites and hornblende granite on the south ; and coarse 

 hornblende granite on the east. These various rocks compose high 

 encircling ridges ; at the base of these a narrow and interrupted belt of 

 variegated banded quartzites outcrops on all sides of the bay. On the 

 west, to north and south of our anchorage at Summer Cove, the quartz- 

 ites could be traced at least two miles along the shore, but they were 

 never found more than about one hundred yards from the beach. The 

 white, red, and purplish layers often exhibited the cross-bedding of a 

 typical sandstone. The strike of the beds is variable, changing from 

 X. G0° W. to N. 20° W., the dips remaining low and constantly directed 

 toward the land. The total thickness of the beds exposed was measured 

 at one hundred feet. The belt terminates at the mouth of the bay in a 

 veritable museum of rock-types, the quartzites being cut by an inter- 



