Revieivs — Geological Survey of Canada. 519 



with regard to tlie time-limits that should be indicated by some of 

 the terms such as Bajociau. Even in the volume before us we find 

 instances of divergent views. Mr. AVarren Upham would, and we 

 think rightly, employ the term Quaternary lor Pleistocene, and 

 Holocene or Recent. Renevier places Quaternary as a synonym 

 of Pleistocene. Moreover, the classification of Tertiary strata pro- 

 posed by Sacco (p. 230) differs in several important particulars from 

 that given by Renevier. 



We would protest against the use of such vague terms as 

 Pre-Pliocene, Supra-Lias, and Infra-Lias fur epochs or series ; even 

 such names as Malm and Dogger for Jurassic divisions are objection- 

 able iu a universal table of strata, for both terms in this country 

 •are locally applied in very different senses. It is not in accordance 

 with custom and decidedly awkward to place the Lias in the 

 Jurassic series and yet to put it below Jiirassique Inferieur ! Mr. 

 Jukes-Browne may have something to say in regard to the grouping 

 of Albian, Vraconian, and Rotomagian in the Middle Cretaceous or 

 Cenomanian. That there is plenty of room for criticism in this 

 Table of Strata, will be admitted ; and certainly all will not agree 

 with the placing of Arvouian as a subdivision of Laurentian, and 

 with the assignment to it of the "problematic organism" Eozooii 

 Caundense ! 



Despite these objections, we feel grateful to Professor Renevier for 

 the great labour he has bestowed on a most important though 

 vexatious subject, and for thus preparing the way for some settled 

 and more definite chronolog-ical nomenclature. H. B. W. 



XL — Geological Survey of Canada.. Geological and Topographical 

 Map of the Northern Part of the Lake of the Woods and Adjacent 

 Country. Scale, two miles to one inch. (April, 1897.) 



THIS region was geologically surveyed by A. C. Lawson ; see 

 Report CC, Annual Reports, New Series, vol. i, 1885 ; A. P. 

 Coleman has furnished information on some points. The map has 

 been compiled and drawn by A. E. Barlow (1885) and W. J. Wilson 

 (1897). The sources of information are given in a marginal note. 



Three parallel geological NW.-SE. sections are given, on approxi- 

 mately the same scale as the map, traversing the country north and 

 south of the Lake, two near its western and one at its eastern end. 

 The Index for the Formations refers to: — I. Huronian (Keewatin), 

 comprising (1) Hydromicaceous and nacreous schists, with some 

 associated chloritic and micaceous schists, and including areas of 

 altered quartz-porphyry. (2) Clay -slate, mica-schist, and quartzite, 

 with some fine-grained gneiss. (3) Agglomerates and other coarse 

 clastic rocks, all more or less schistose, and generally of volcanic 

 origin. (4) Hornblende-schists and altered traps, with some chlorite- 

 ■schists, of volcanic origin. II. Laurentian. (5) Coarse-grained gneiss. 

 HI. Irruptive. (6) Later irruptive basic rocks. (7) Eelsite, micro- 

 granite, quartz-porphyry. (8) Granite. 



Ten marginal notes afford particulars about these formations, and 

 on other local points. The first two groups of schists, slate, gneiss, 

 etc., are more or less auriferous, with many promising veins. 



