416 E. S. MOORE 
7. Whitish to brownish calcareous quartzite varying from very fine- oe 
grained and cherty to coarse-grained, and grading into black 
quaxtzitic slate mean the idialnaseamas i s-met eae ee A477 
Bec DiabaSevsullis eget, hee OCG Nae ger ule cara cn aN one 80 
g. Interbedded, dark, slaty quartzite, graywacke and shale contain- 
ing considerable lime and usually highly silicified.............. 352 
to. Silicified, crystalline limestone and dolomite interbedded with 
bands olicaleaneousimedishales a yee anet ar Sr enn ene I51 
11. Thin-bedded, “‘ribboned”’ shales, highly banded in red, white, 
and gray. These are not uniformly siliceous, and they weather 
so as to produce striking corrugated surfaces................. 89 
£2. Drabasecdike tents ch meade Peas oP ee R Mae Lea decay ng Ae 12 
137) Calcareous andusiliceousis later. eee ee eee eee 25 
14. Algal, concretionary limestone silicified and marbleized........ 428 
15. Diabase sill carrying much disseminated pyrite............... 190 
16. Mostly drift-covered, but outcrops show dense, gray, banded, 
siliceous, impure limestone and dolomite altered to talcose schist 
and SeEpentinemeardiabasce) eee rar re erie nese 2.073)" 
17. Reddish to gray graywacke and arkose with narrow bands of 
Jasperyshalewandisamdstomer aye ret te th Wi eieie ecar es ee 618 
18. Great mass of basalt and diabase forming the central mass of 
Tookcarak Island. The lowest rock recognized in the region and 
its thickness is uncertain, although it must be considerable. It 
is not certain whether it is an intrusion or a flow interbedded with 
the sediments icy. eu.w en ee ine nree eet ee me Nal mere ia re a (?) 
Motalsthickness;omthesectioneye. ee nee wen eee 9,5900+ 
Total thickness of the Belcher sedimentary series............. 9,079+ 
The formations of this series, which can be correlated with 
some degree of accuracy with those of the Nastapoka and Rich- 
mond groups, are the iron-formation and the algal limestones. In 
the section on the Nastapoka Islands, Low does not recognize an 
erosion unconformity, while Leith considers that there is one 
between the Nastapoka and Richmond groups. In the section 
given above, the Richmond group is but poorly represented, but 
from Leith’s description it would appear that the dividing line 
should be drawn at the bottom of division No. 16. The only 
evidence of an unconformity observed by the writer was in a narrow 
band, of about five feet, of fine-grained conglomerate and coarse 
sandstone containing little fragments of chert and jasper. This 
is near the base of the algal limestones on the east side of the 
diabase on Tookcarak Island. 
