86 Reviews — /. M. Sohral — Nordingra, east coast Siveden. 



peaks more than 3,000 feet in height, while Beinn Dearg to the 

 north-east rises to 3,547 feet. 



Particular accounts are given of all these formations, their sub- 

 divisions, and of the various intrusive rocks. Tlie fossils of the 

 Cambrian and Lias are duly noted, tliose of the latter belonging to 

 the Lower Lias. There are interesting descriptions of the glacial 

 phenomena and of the successive phases of the glaciation ; and much 

 attention is devoted to the physical features, to the rivers, and to 

 the modification of former drainage systems, especially during the 

 Glacial Period. The influence is pointed out of faults and great 

 displacements on the trend of the lochs and of some of the ravines, 

 and it is remarked that " Of the larger lakes in the area under 

 consideration, some occupy rock-basins and some are due to the 

 irregular distribution of the glacial deposits ". 



Raised Beaches, Alluvium, Peat, and Blown Sand are noticed, 

 and in a final chapter on Economic Geology an account is given of 

 the iron-smelting formerly carried on along the shores of Loch Maree 

 and the neighbourhood. The only local ore is that of bog-iron, 

 but in later times ores not found in the district were imported. 

 Limestones (Lewisian, Cambrian, and Lias) have been quarried for 

 lime -burning, etc., and various rocks have been used for building 

 purposes and road-metal. Metalliferous veins are rare, and apparently 

 of no importance : they include ores of lead and copper, and traces 

 of gold. Notes on plantations and on the rainfall are included, 

 and there is a useful bibliography. 



V. CONTKIBTJTIONS TO THE GeOLOGY OF THE NoRDINGKA ReGIOJI". 



By Jose M. Sobeal. 8vo ; pp. 117, with 12 plates, 1 map, and 

 1 figure in the text. Upsala : Almqvist & "Wiksells, 1913. 



ryiHE district included by the author under the title of the ]S"ordingra 

 JL Region is situated on the east coast of Sweden, extending from 

 Hernon on the south to Malmon on the north. Inland, and to the 

 north and south of the district, is a large area of Archaean rocks, 

 but the greater part of the region is occupied by a group of igneous 

 rocks — granites, monzonites, gabbros, and anorthosites. These rocks 

 are overlain by arkose and quartzitic sandstones, belonging to the 

 Jotnian formation of Fenno-Scandia, which are themselves intruded 

 and covered by diabase of pre-Cambrian age. The granites and 

 gabbros are clearly pre-Jotnian, and are believed to be post-Jatulian 

 in age. The field relations of the rocks of the various districts are 

 described in detail, and special attention is devoted to the petrography 

 and petrology of the igneous rocks. 



On the east of Ramstafjarden there is a naiTOw outcrop of igneous 

 rocks, including pyroxene- and biotite-granites, apparently forming 

 a group distinct from the main granite masses of Nordingra which 

 are largely hornblende-granites. In the Sub-Jotnian igneous rocks 

 of the mainland the order of solidification appears to have been 

 anorthosite, gabbro, granite. There is interesting evidence of assimi- 

 lation at the contacts of the granite both with the anorthosites and 

 gabbros and with the Archaean leptites. Monzonitic rocks occur in 



