28 B GEOLOGICAL SURVEY OF CANADA

showing the presence of a low anticline. In this stretch several dykes of
fine-grained, diakase cut the strata in a direction of N. 50°-75° HK.
These dykes are from two to three feet thick and sometimes stand up
as walls along the beach.

Approaching the mouth of the Honna, which enters the harbour
inside Lena island, the dip of the shales, which on the small point
east is to the north at an angle of 30 degrees, gradually swings
round to southwest < 30°-40°. A fourth of a mile west of the mouth
of the river, near the commencement of the Narrows separating Lena
island from Graham island, a heavy mass of conglomerate comes in and
forms high hills to the north and a rough shore for some hundred yards
westward. This rock also appears on the west side of Lena island. It
separates the lower series of shales, just described, from what has been
called the ‘‘upper shale and sandstone series’’ by Richardson and Dawson.
It conforms in dip with the underlying shales and is an integral part of
the series. In the lower part, it contains beds of grey grit which, by the
addition of pebbles, soon passes into conglomerate proper.

The pebbles in this rock are of all sizes, and comprise granite, dia-
base, sandstone and shale. The conglomerate extends along the shore
past the Narrows for half a mile, and then passes up into the upper
series. The rocks of this upper series closely resemble portions of the
lower series, and continue westward along the shore to within half a
mile of Slate Chuck creek. The intervening upper shales, about mid-
way of this distance, show a synclinal structure. They are usually
greyish, but in places become reddish-brown, and are sometimes thin

and papery. The dip near the intermediate conglomerate is about S.
20° W. 10°-30°.

Just west of a deep bay about one mile from the edge of the conglomer-
ate belt the shales, which have been dipping uniformly to the southwest,
show local foldings, and are probably near the centre of the synclinal just
mentioned. A short distance farther on, the dip changes to the east and
continues thus to within a short distance of the Slate Chuck, where the
conglomerates of the Honna area again appear. As elsewhere, the slates
are cut across by dykes of basalt, and traces of fossils are seen at several
places. The conglomerates east of Slate Chuck contain well-rounded
pebbles of igneous rocks and fragments of slate, and are evidently the
equivalents of the large area of these rocks seen at the Narrows, forming
here the under portion of the shale synclinal. Mixed bands of slate and
conglomerate with intrusive dykes extend thence along the shore to a
point several hundred yards west of the creek, where they are much
faulted. At the mouth of a small creek half a mile west of Slate