72 RevieiDS — Geological Survey of Canada. 



Michipoten District, including a description of the great mass of 

 hematite ore at the Helen Mine. 



In the Province of New Brunswick, Professor L. W. Bailey has 

 determined the Ordovician and Silurian age of the rocks of the 

 so-called great slate belt, and he has also contributed a separate 

 report on the Carboniferous System of this Province with respect to 

 the occurrence of workable coal-beds. The same subject is also 

 treated by Mr. H. S. Poole, who arrives at the conclusion that to 

 the north of the coastal range there are no equivalents of the 

 productive Coal-measures of Nova Scotia, and that the prospects of 

 any thick seams to the south of the range are similarly unfavourable. 



In Nova Scotia, Mr. H. Fletcher has examined the south-western 

 corner of the Springhill Coalfield and the Inverness Coalfield in 

 Cape Breton. 



Of the other reports in the volume, may be mentioned that by 

 Mr. A. P. Low on the barren region bordering the east coast of 

 Hudson Bay, from Cape Wolstenholme to the south end of James 

 Bay. The northern and southern portions of the coast are of low, 

 rounded hills of gneiss or granite, whilst the intermediate area 

 consists of bold hills, 1,000 feet or more in height, of granite or 

 trap. Argillites, greywackes, and cherts, associated with large 

 masses of magnetite and hematite, and overlain by cherty carbonates 

 of iron, magnesia, and lime, are likewise present. The series is 

 capped by limestones, dolomites, carbonaceous shales, and sandstones. 

 The sedimentary rocks are traversed by large vertical dykes of 

 diabase, and subsequentl3f by enormous irruptions of granite, which 

 have considerably altered their characters. Fossil evidence of their 

 age is wanting, but they are regarded by Mr. Low as pre-Cambrian. 

 The geology of the basin of the Nottaway Eiver, an extensive region 

 lying to the south-east of James Bay, or between the Upper Ottawa 

 and the Eupert Eiver, was explored and partly surveyed by Dr. E. 

 Bell in 1895-6, and in a brief report and on his map it is shown to 

 consist largely of Laurentian gneiss with belts of crystalline schists, 

 granites, and greenstones of Huronian age. 



There is also a report by Mr. J. B. Tyrrel on the north-eastern 

 portion of the Saskatchewan District and adjoining portions of the 

 Keewatin. The greater part of these areas is underlain by Laurentian 

 gneiss and granite and Huronian schists. Undisturbed limestones 

 of Trenton and Niagara age overlie the older crystalline rocks, and 

 these in turn are covered by Pleistocene (glacial) clays. 



Further reports comprise an elaborate description by Mr. J. A. 

 Dresser of the geology and petrography of Shefford Mountain, 

 Quebec, illustrated by plans and figures. The mountain is con- 

 sidered to be of laccolitic origin. The report of the Section of 

 Chemistry and Mineralogy by Dr. G. C. Hoffmann and his assistants, 

 Messrs. Wait and Johnston, consists mainly of determinations of 

 ores and rocks of but little general interest. The concluding report 

 of the Section of Mines by Mr. E. D. Ingall and Mr. J. McLeish, 

 extending to 160 pages, principally consists of statistics of the 

 output and value of the metals, minerals, and structural materials 

 obtained in the Dominion during 1900. 



