REVIEWS 477 



The Edmonton Coal Field, Alberta. By D. B. Dowling. Canada 



Department of Mines, Geological Survey Branch, 1910. 



59 pages, 2 maps. 



The area primarily considered is on the Saskatchewan River, in and 



near Edmonton, but a short discussion of the surrounding coal fields 



is included. The coal is lignitic or semi-bituminous, and occurs near 



the middle and at the top of 700 feet of brackish water deposits, the 



Edmonton formation, at the top of the Cretaceous, and in Tertiary 



sandstone above. The lower horizon, the Clover Bar seam, is worked 



at Edmonton, and 80,000,000 tons are estimated to be available in an 



area of 14 square miles. 



W. A. T. 



Preliminary Memoir on the Lewes and Nordenskiold Rivers Coal 

 District, Yukon Territory. By D. D. Cairnes. Canada 

 Department of Mines, Geological Survey Branch, 1910. 70 

 pages, 2 maps. 

 The development of the Whitehorse copper deposits was the incentive 

 for the investigation of the available coal resources in the district 

 described in this report. The important formations of the district 

 are the Braeburn limestone (carboniferous?), the Laberge series, con- 

 glomerates, shales, sandstones, etc., and Tantalus conglomerates, Jurasso- 

 Cretaceous. Tertiary volcanics have broken through these formations 

 and overflowed them in many places. Important coking coal seams 

 occur in the Tantalus conglomerates and near the top of the Laberge 

 series, but they are available only near the navigable water, such as 

 the Lewes River and Lake Laberge. 



W. A. T. 



Geology of the Nipigon Basin, Ontario. By A. W. G. Wilson. 



Canada Department of Mines, Geological Survey Branch, 



1910. 152 pages, 1 map. 

 The region covered by this excellent report is underlain mainly by 

 Laurentian gneisses and granites, but scattered over it are areas of 

 greenstones and green schists, called Keewatin. A few bands of Lower 

 Huronian rocks are known. Lying on the eroded surface of these 

 formations is a series of conglomerates, sandstones, shales, and dolo- 

 mitic limestones classed as Keweenawan, although the author believes 



