378 Reviews — Geological Work on the Western Front. 



appears in the metamorphosed rocks of the Start, South Devon 

 {Proc. Geol. Soc, 1922, pp. 88-9).] 



Rocks containing the typical minerals of Barrow's higher zones 

 are not absent from the Stavanger region, but their occurrence is 

 sporadic. Superposed on this progressive metamorphism is an 

 intensive soda metasomatism in the neighbourhood of the sodic 

 Caledonian intrusives (trondhiemites, etc.), the garnet zone thus 

 passing into a zone of albite-porphyroblast-schists, and these in 

 turn to injection gneisses. There is evidence to believe that the soda 

 has beer) here introduced not as albite, but as sodium silicate (water 

 glass), which, reacting with the aluminous constituents, has given 

 rise to abundant albite. 



To the writer it appears that herein lies the reason for the 

 irregular occurrence of Barrow's higher zones, the formation of 

 staurolite, kyanite, and sillimanite being largely inhibited by 

 reaction of the excess alumina with the incoming soda from the 

 intrusives. The first published report of intensive metasomatism 

 in the contact zones of intrusives comes, however, from the 

 Kvikkjokk and Kebnekaise regions of northern Sweden, as studied 

 by Gavelin and Quensel. A preliminary report appeared in 1915, 

 but the detailed work of Quensel has stUl to be published. 



Thisfurtherwork of Quensel, and the continuation of Goldschmidt's 

 work in the Stavanger region, particularly in regard to the evidence 

 of progressive metamorphism in the green schists of this area, will 

 be awaited with much interest. 



The results already obtained point clearly to the need for a careful 

 study of those Highland sediments in contact with the older and 

 newer granites, particularly any of sodic character, for evidence 

 of metasomatic processes of a like order. 



Whatever be the case, it is clear that in Barrow's zonal map of the 

 south-east Highlands we have the most complete and detailed of 

 any vet published. 



C. E. TiLLEY. 



Geological Work ok the Western Front. The Work of the 



Royal Engineers in the European War, 1914-1919. pp. viii + 



71, with vii plates and 19 figures, photographs, maps, and 



sections. Chatham : W. J. Mackay & Co., Ltd., 1922. 



rpHIS book, of which, we believe, a very limited issue was printed, 



-*- is published by the Secretary of the Institution of Royal 



Engineers, Chatham. It contains a record of the geological work 



carried out in France and Belgium by the geologists attached to 



the military forces. In April, 1915, Captain W. B. R. King, of 



H.M. Geological Survey, was chosen for this work, and in June he 



joined the staff of the Chief Engineer in France, imder whom he 



continued to work till the end of the war. In May, 1916, Lieut.- 



Col. Sir T. W. Edgeworth David arrived in France with the 



Australian Mining Corps, and acted at first as geological adviser on 



