Ki r» i» Hudson's strait and bav. 



and Huclson'H Bhv, I have obHorvod that, other tliinj^t* boini? o«iual, tho 

 wator of lakes where ignei»U8 rocks prevail, is much clearer than thoHO 

 surrounded by gnoiMs or schists. The Rev. Mr. Peck visite*! tho lake 

 roforvod to in 1884, and he informs me that it merits its name from tho 

 clearness of its waters. 

 f)chi9tofe imiids Schistose bands and areas which have been classified as Iluronian 

 are largely developed within the general limits of the Laurentian 

 «ountry to the south and west of James' Bay and apparently also on 

 the northwest side of Hudson's Bay, but to the eastward few indica- 

 Labrndcir tions of theso I'ocks have yet been discovered. The Labiador penin- 

 I'eninsuiu. ^^^^i,^ measures, as nearly as possible, 1,000 miles fron) the Straits of 

 Belle Islcdue west to the Eastmnin coast of James' Bay, by 1,000 miles 

 from Cape Wolstenholme, on Hudson's Straits, to Mingan on the Gulf 

 of St. Lawrence. The interior of thia vast region has not yet been 

 explored geologically, except to a very limited extent, so that rocks of 

 tho «lass called Huronian may exist in great force in some parts of it 

 A non-fossiliferouH, but unaltered limestone, like those of the Mani- 

 tounuck group is found around Lake Mistassini near the head of the 

 Rupert River in the southern part of the above region. 



The gneissic rocks of the east coast of Hudson's Bav have been des- 

 cribed in my reports for ISTS and 1877. and those of Hudson's Straits 

 in the report foi- 1884. Dr. Frans Boas, in tliR course of his explorations 

 has made some notes on the fundamental rocks of Baiiin Land, which 

 stretches from Hudson's Straits northward through twelve degrees of 

 latitude, or to Lancaster Sound. At page 57 of his report (Dr. A. 

 Petermann's Mitteilungen aus Justus Perthes Geographischer Anstalt, 

 Nr. 80. Gotha. Nov. 1885), he says : " Let us, in conclusion, cast a 

 glance on the geological structure of the last-mehtioned territory (the 

 northern part of Baffin Land). The nucleus of the mountain masses 

 • appears to be eveiywhere gneiss, which I found especially at Kinguait 



Rocks of Baffin and Panguirtung. In clo.sest combination with the gneiss, granite, also 

 occurs, which, especially large-grained, appears iu the ccast ranges and 

 islands. — Anarmtung and Nuvakdjuak in Cumberland Sound ; Padlop- 

 ing, Kexertaxdjuin, NudUing, Tupirbikdjawitjung and Siorartijung on 

 Davis Strait." 



" In Cumberland Sound, as well as in the Naguimiut plateau, which 

 latter is mostly composed of fine grained granites, there are found at 

 isolated places, diorites and t rap-gran ulites which have broken through 

 the granite. The occurrence of these to the south on Blunt peninsula, 

 Cumberland ^^^ "^^^"^ Confirmed. In Cumberland Sound I found them at Panguir- 

 Sound. tung and in a well-marked dyke in Akuliaxling eastward from Kexer- 



ten. The same diorite appears also in the mountain Kaliugujang to 

 the east of Kinguait." 



