236 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
of the tectonic axis of the system can be made in the broad areas of 
eruptive granites, diorites and gabbros so plentifully distributed along 
the coast. In the northern part, from Cape Chidley to Cape Mugford, 
the structural trend is represented in the present day topography of the 
Torngats and, to a less degree, of the Kaumajets. Elsewhere, there are 
only subordinate ranges of bills the directions of which lie parallel to 
the strike. The peculiar attitude of the east-west crest-line of the Kig- 
lapait cannot be explained until the constitution of that range is known. 
It would be of great interest to determine the relation between this 
Labrador trend and the structural axes of the Appalachian system. A 
hint of that relation was suggested by the structures observed at Great 
Bréhat Harbor in Newfoundland (twenty miles south of Cape Bauld). 
There a series of slates and feldspathic sandstones of unknown age but 
very similar to the Cambrian (!) sediments of Kirpon, shows stratifica- 
tion striking on the average N. 65° W. while a later and beautifully 
developed slaty cleavage strikes N. 35° E. The cleavage has an Appa- 
lachian trend; the folds show what may be regarded as the Labrador 
trend. Ifthe future survey of northern Newfoundland proves that this 
association of structures is general, it may not be too bold to consider 
the region as at the nodal point of intersection of the two master struc- 
ture lines of eastern North America. 
These structural lines are likewise related respectively to the Labra- 
dor and Appalachian continental shelves which are so typically devel- 
oped. Where the two shelves meet, we have the Grand Bank of New- 
foundland. Although not accentuated among the theories of the Bank so 
far formulated, the possibility that the plateau on which it stands owes 
its origin to tectonic movements at the intersection of the Labrador 
and Appalachian structural axes, should not be overlooked. Thoulet 
seems to have thrown final discredit on the older view of Maury that the 
Bank has been built up from the deep sea by iceberg droppings ; but 
Thoulet’s replacing icebergs by coast-ice as the carrying agents still 
leaves the question open as to whether the materials dredged up from 
the Bank may not represent but a very shallow veneer coating the sur- 
face of a submerged mountain-plateau. 
Observations on the Surface Geology. 
The most important problems in connection with the surface geology 
of the coastal belt relate to glaciation and postglacial crustal movements. 
These processes became most interesting, perhaps, when viewed in the 
