(520 , . Reviews — Geological Survey oj Scotland. 



;r6ferred to. who had observed this interesting geological deposit. 

 Mr. E. T. Newton, F.R.S., contributes some notes on plants from 

 the Beading Leaf-bed, first described by Sir J. D. Hooker (Quart. 

 Journ. Geol. Soc, 1854, vol. x, p. 163). 



The London Clay (pp. 42-52) is next dealt with, and a list of the 

 .fossils of the Basement Bed is added. Then follows a description 

 of the Upper Bagshot, Bracklesham, and Lower Bagshot Bed^ 

 (pp. 53-59). The Clay-with-flints and Pebble-gravel are described 

 in a separate chapter (pp. 61-62), followed by the Plateau -gravel, 

 which forms extensive layers often 20 feet in thickness, from 160 to 

 500 feet above the sea-level. 



The memoir ends with an account of the Valley-gravel, Loam, 

 and Recent deposits. An appendix of principal woi'ks and authors' 

 names who have contributed to the geology of the district, and 

 a good index, complete this useful memoir. There are thirteen 

 illustrations in the text, ten of which represent fossils. This memoir 

 is published at Is. %d. in paper wrapper. 



Memoirs of the Geological Survey of Scotland. 



IV. — The Geology of North Arran, South Bute, and the Cumbraes, 

 with parts of Ayrshire and Kintyre (Sheet 21 of the one-inch 

 Geological Map of Scotland). 8vo ; pp. viii and 200, with 

 10 plates and 2 figures in the text. Printed for H.M. Stationery 

 Office b}' James Hedderwick & Sons, Glasgow. J. Menzies & 

 Co., Edinburgh (or of Messrs. Dulau & Co., 37, Soho Square, 

 London, W.), 1903. Price 4s. 



The Description of North Arran, South Bute, and the Cumhraes, by "W". Gunn, 

 F.G-.S. ; Part of Ayrshire, by Sir A. Geikie, D.C.L., F.R.S. ; Part of Kintyre, 

 by B. N. Peach, F.R.S. ; On the Petrography of the Tertiary Igneous Rocks 

 of Arran, South Bute, and the Cumbrae Islands, by A. Harker, M.A., F.R.S. 



THE present memoir describes the geology of the area embraced 

 in Sheet 21 of the one-inch Geological Map of Scotland, and 

 includes the north part of Arran, South Bute, and the Cumbraes, 

 with parts of Ayrshire and Kintyre. The ground in Ayrshire was 

 surveyed by Sir A. Geikie, who also mapped a narrow belt along 

 the east coast of Arran in 1872. Bute and the Cumbraes were 

 surveyed by Mr. Gunn, and the small area in Kintyre by 

 Mr. Symes. The survey of the southern part of Arran was com- 

 menced in 1892 by Mr. Gunn, who gradually traced his lines 

 northwards till he completed the mapping of the whole island ; 

 the field-work being carried on under the supervision of Mr. B. N. 

 Peach, F.E.S. The geological description of North Arran, South 

 Bute, and the Cumbraes has been written by Mr. Gunn, that of the 

 Ayrshire Coast by Sir A. Geikie, and that of Kintyre by Mr. Peach. 

 The petrography in chapter xi has been supplied by Mr. A. Harker, 

 F.R.S. In part ii of the Appendix the notes on the petrography of 

 the Old Red Sandstone igneous rocks have been contributed by 

 Mr. Kynaston, and those on the Carboniferous igneous rocks by 



