134 Reviews — Geology of Glenelg, Lochahh, and S.E. Shye. 



Series to the true Coal-measures. An interesting feature of the 

 memoir is the history of the contemporaneous volcanic rocks of 

 the Garleton Hills and the associated igneous intrusions, including the 

 trachytic masses of North Berwick Law, the Bass Bock, and Traprain 

 Law. A full account is given of the petrology of these volcanic rocks 

 and associated intrusions ; and views are given in plates of the Bass 

 Bock and the rocks of Dunbar Castle. 



The records of the Glacial period, and, in particular, the glacial 

 drainage channels connected with the retreat of the ice-sheet, are 

 passed in review, particulars and some illustrations being reproduced 

 from the interesting paper by Brofessor B. F. Kendall and 

 Mr. E. B. Bailey (Trans. Boy. Soc. Edin., noticed in Geol. Mag., 

 May, 1908, p. 231). 



In the chapter on Economics particulars are given of the coals, 

 fireclays, bixilding-stones, agriculture, and water-supply. Lists of 

 Carboniferous fossils are given in an appendix. 



The two 1 inch geological maps described in the memoirs are 

 Sheets 32 and 33, excellently colour- printed, and issued each at the 

 price of 2s. 6d., instead of 13s. 3d. and 10s. 3d., the later prohibitive 

 prices put on the hand-coloured maps by H.M. Treasury. An 

 enormous amount of detail is shown, largely by symbols among the 

 igneous rocks, thirty tablets being devoted to them in the Index of 

 Colours. The Glacial Drifts are not distinguished by colour, but only 

 by engraved symbols. 



3. The Geology of Glenelg, Lochalsh, and South-East part ok 

 Skte. By B. IS". Beach, J. Horne, H. B. Woodward, C. T. 

 Clough, A. Hakker, and C. B. Wedd ; with contributions by 

 G. Barrow, J. J. BE. Teall, J. S. Flett, and F. L. Kitchin. 

 Edinburgh : printed for H.M. Stationery Office, and sold by 

 W. A. K. Johnston, Ltd., 2 St. Andrew Square, and T. Fisher 

 Unwin, 1 Adelphi Terrace, London. 8vo, wrapper; pp. x, 206, 

 with 13 plates and 13 text-illustrations. 1910. Brice 3s. 6d. 



riMHIS memoir, one of the more elaborate of those issued by the 

 _L Scottish branch of the Geological Survey, has been edited with 

 great precision by Mr. Clough. It is descriptive of Sheet 71, which 

 Ave are pleased to see in colour-printed form and issued at the price of 

 2s. 6d. Although it has no less than seventy-five tablets to represent 

 geological formations and subdivisions, the map clearly displays the 

 main structure of the ground, the Glacial drifts being uncoloured and 

 indicated by signs, although by no means unimportant from an 

 agricultural point of view. 



The most ancient rocks are exposed on the eastern and southern 

 portions of the area, in parts of the mainland of Boss and Inverness 

 and the south-east of Skye. They are described by Messrs. Home, 

 Beach, and Clough. The oldest group, the Lewisian gneiss, includes 

 thick layers of limestone, graphitic bands, and some gneisses of 

 sedimentary origin. The Moine schists, "of uncertain age," but 

 regarded as a newer group, give evidence pointing to the conclusion 

 that the Moine sediments were laid down unconformably on the 



