114 



THE JOURNAL OF GEOLOGY. 



Lawson,' in 1893, on lithological grounds suggests the following hypothet- 

 ical correlation of certain rocks of Western Ontario and Minnesota, Eastern 

 Ontario and Quebec : 



Co7)mie7its. — It seems to the reviewer that such lithological correlations 

 between rocks in different and widely separated geological provinces have no 

 value. The reasons for this belief cannot be here stated, but they have been 

 published in Bull. No. 86, U. S. Geol. Survey. 



Barlow- describes the Laurentian granites and gneisses as intrusive in the 

 Huronian rocks north of Lake Huron. The localities described are Killarney 

 Village ; Beaver, Fox, Balsam, Three Mile, Brush, Camp, Crooked, Johnny, 

 Panache, Wavy, Chief's, Daisy, Baby and Alice lakes ; Goshen, Broder and 

 Dell townships ; Wahnapital river ; Cartier and Straight Lake Stations ; and two 

 islands near Thessalon. As evidence of the eruptive nature of the Laurentian 

 gneiss in the Huronian sediments are cited the diverse stratigraphic relations 

 of the rocks along their line of junction ; the invariable alteration of the sedi- 

 mentary rocks along the contact line ; the inclusion of angular fragments, 

 clearly referable to the adjacent sedimentary strata in the gneiss ; the occur- 

 rence of gneissic intrusions and apophyses of pegmatite, occurring in or 1am- 



'The Norian Rocks of Canada, by A. C. Lawson. Science, Vol. XXL, No. 538, 

 pp. 281-282. 



^ Relations of the Laurentian and Huronian Rocks North of Lake Huron. By A. 

 E. Barlow. Bull. Geol. Soc.of Am., Vol. IV., pp. 313-332. 



