REVIEWS 287 



The Lime and Cement Resources of Missouri. By H. A. Buehler. 

 Missouri Bureau of Geology and Mines. Vol. VI, 2d series. 

 In this report the materials suitable for use, the properties and methods 

 of manufacture of lime, and the various kinds of cement are described 

 in considerable detail, the resources and development being described 

 for each county separately. The available deposits of limestone, clay, and 

 shale are extensive, and the industry is a very important one. 



E. R. L. 



Preliminary Report on a Portion of the Main Coast of British Colum- 

 bia and Adjacent Islands in the New Westminster and Nanaimo 

 Districts. By O. E. Leroy. Canada Department of Mines. 

 Goelogical Survey Branch. 

 The area described embraces that portion of the coast of British Colum- 

 bia between the international boundary line and the mouth of Powell 

 River on Malaspina Strait, and lies almost wholly in the mining district 

 of New Westminster. 



The rocks in the district include sedimentary rocks of Devonian, 

 Carboniferous, Cretaceous, and Quaternary (Glacial) age, and Paleozoic, 

 Mesozoic, and Eocene igneous rocks. The principal ore deposits, which 

 lie chiefly in Paleozoic rocks, are of copper and iron. The magnetite 

 deposits are extensive, but have not been developed. A short summary of 

 the copper deposits would add to the value of the report. 



E. R. L. 



The Laurentian System in Eastern Canada. By F. Dawson Adams. 

 Quarterly Journal of Geological Society, Vol. LXIV, 1908, 

 pp. 127-48, and pis. XI-XIII. 



This paper is an outline of the chief results obtained from an extended 

 study of a selected area, the object being to determine the character, struc- 

 ture, relations, and origin of Logan's Laurentian succession in eastern 

 Canada. 



In Logan's original classification, the Laurentian included two series, 

 the Grenville series, and the Lower Orthoclase (Fundamental) Gneiss. 

 The former is shown to be, in origin, a great development of Proterozoic 

 sediments; the latter consists of great bodies of igneous rock underlying 

 and intruded into the sediments. The term Laurentian is restricted to 

 the underlying series. The Grenville series presents by far the greatest 

 thickness of pre-Cambrian limestone in North America. 



E. R. L. 



