Miscellaneous — Iron-ore in Raasay. 143 



to take place on a small scale at the tip of a thin ice-lohe is, as 

 Professor Bonney has remarked, not sufficient to justify the view that 

 this is the manner in which gravels have been transported by ice to 

 high levels. 



Professor Bonney quotes Professor Kendall as saying that there is 

 "no logical halting-place between an uplift of ten or twenty feet to 

 surmount a roche moutonnee, and an equally gradual elevation to the 

 height of Moel Tryfaen". Mr. Lamplugh is surely referring to the 

 same bodily upbending of the front of an ice-sheet when he writes 

 of "the characteristic upturning of the layers of ice at the end of one 

 of the glacial lobes", as observed by Professor 11. D. Salisbury in 

 Greenland (York Address, Brit. Assoc. Bep., 1906, p. 543). 



Nowhere in his writings, as far as I know, does Mr. Lamplugh 

 recognize the importance of overthrust in ice-movement, as this has 

 been described by Professor T. C. Chamberlin, and amplified later by 

 Professors Garwood and Gregory (Q.J.G.S., vol. liv, 1898). I think 

 Mr. Lamplugh cannot have read my letter with sufficient care, or he 

 would not have considered it to be a mere repetition of views 

 previously advanced and duly appreciated by him. 



It seems to me that the land-ice hypothesis would get along much 

 better if we heard rather less of "the characteristic upturning of the 

 layers of ice at the end of the lobes ", and rather more of the upthrust 

 action in the main body of the ice, as demonstrated by Professors 

 Chamberlin, Garwood, and Gregory ; and I am pleased that I have 

 been able to elicit from Mr. Lamplugh a plain repudiation of what is 

 obviously a crude conception. 



T. Crook. 



:ivn i s o :e iii, Hi, .a. :isr e o tt s . 



Iron-ore in Baasay. 1 



The recent announcement of the discovery of a valuable deposit of 

 iron-ore in the Island of Baasay has been received with the greatest 

 interest in iron and steel trade circles in the West of Scotland. The 

 deposit was originally discovered in 1893 by, Mr. H. B. Woodward, 

 P.B.S., F.G.S., of the Geological Survey, who contributed an 

 instructive article on the subject to the Geological Magazine 2 ; but 

 the credit of investigating it in the interests of commerce belongs to 

 Mr. Wallace Thorneycroft, who has been engaged in preliminary 

 exploring work in the island during the greater part of last year. 

 It is reported that Messrs. William Baird & Co., Limited, iron- 

 masters, of Gartsherrie, have purchased the island from Mrs. Wood, 

 the present proprietrix, with the view of further proving and 

 developing the property. The deposit is situated at the junction 

 of the Upper and Middle Lias, which corresponds approximately with 

 the geological position of the Cleveland ironstone. On the eastern 



1 From the Glasgow Herald, December 31, 1910. 



2 "On a Bed of Oolitic Iron-ore in the Lias of Raasay": Geol. Mag., 

 November, 1893, p. 493. See also British Association Reports, Section C 

 (Geology), Nottingham Meeting. 



