416 Canadian Record of Science. 



On the Norian or " Upper Laurentian " For- 

 mation of Canada. 



By Frank D. Adams, M.A.Sc, Ph.D. 



(Translated from the German by N. J. Giroux, Esq., C.E., of the 

 Geological Survey of Canada.) — Concluded. 



IV. VAKIOUS OTHEE ANOETHOSITE AEEAS. 



(a) In Labrador. 



Although the first specimens both of labradorite and 

 hypersthene, so characteristic of the anorthosite, were 

 brought from the coast t)f Labrador, their distribution 

 and mode of occurrence in this distant region is as yet 

 but comparatively little known. That they really come 

 from anorthosite areas w T hich are similar to those above 

 described, and which belong to the same great system of 

 intrusions, is, however, evidenced by what has been re- 

 ported of them by several travellers. 



The opalescent labradorite and the hypersthene of 

 Labrador were mostly found in loose blocks and frag- 

 ments which belong to the drift formation, and lie 

 abundantly scattered about on St. Paul's Island and in 

 the neighbourhood of Nain. But, according to Eeichel, 1 

 Steinhauer, 2 and Bindschedier, 3 a rock which contains 

 them is found in situ in the neighbourhood of the 

 latter place. The main mass, however, according to the 

 statements of Lieber, 4 Steinhauer, and Bindschedier, must 

 be situated farther inland ; the latter gives the most 

 accurate information about it in stating that it occurs at 

 the north-west end of a large lake about 30 or 35 nautical 

 miles north-west of Nain. He was there himself in the 



1 Reichel, Labrador, Bemerkungun uber Land und Leute. Petermann's Mitth. 

 1863, p. 121. 



2 Steinhauer, Note relative to the Geology of the Coast of Labrador. Trans. Geol. 

 Soc, Vol. II., 1814. 



3 Bindschedier, quoted by Wichmann, Zeitschr. d. Deutsch. geol. Ges. 1884, p. 486. 



4 Lieber, Die amerikanische astronomisehe Expedition nach Labrador im Juli 1860. 

 Petermann's Mitth. 1861, p. 213. 



