﻿part 2] 



THE ISLAT ANTICLINE. 



159 



IV. Bibliography. 



1. J. Macculloch. — 'The Western Islands of Scotland' vols, ii & iii, 1819. 



2. R. I. Murchison & A. GrEiKiE. — ' On the Altered Rocks of the Western 



Islands of Scotland & the North- Western & Central Highlands ' 

 Q. J. G. S. vol. xvii (1861) p. 171. 



3. J. Thomson. — ' On the Geology of the Island of Islay ' Trans. Geol. 



Soc. Glasgow, vol. v (1873-76) 1875, p. 200 (a short account was 

 communicated to the British Association in 1871). 



4. One-Inch Geological Survey Map of Scotland, Sheet 20, 1 1896. 



5. One-Inch Geological Survey Map of Scotland, Sheet 19, 1898. 



6. One-Inch Geological Survey Map of Scotland, Sheet 27, 1900. 



7. ' The Geology of Islay (Explanation of Sheets 19 & 27 & part of 20) ' 



Mem. Geol. Surv. Scotland, 1907. 



8. W. B. Weight.—' The Two Earth-Movements of Colonsay ' Q. J. G. S. 



vol. lxiv (1908) p. 297. 



9. One-Inch Geological Survey Map of Scotland, Sheet 36, 1909. 



10. ' The Geology of the Seaboard of Mid Argyll (Explanation of Sheet 36) '. 



Mem. Geol. Surv. Scotland, 1909. 



11. One-Inch Geological Survey Map of Scotland, Sheet 28, 1911. 



12. ' The Geology of Knapdale, Jura, & North Kintyre (Explanation of 



Sheet 28 with parts of 27 & 29) ' Mem. Geol. Surv. Scotland, 1911. 



13. One-Inch Geological Survey Map of Scotland, Sheet 35, 1911. 



14. ' The Geology of Colonsay & Oronsay, with Part of the Boss of Mull 



(Explanation of Sheet 35 with part of 27) ' Mem. Geol. Surv. Scotland, 

 1911. 



The authorship of the above-mentioned Geological Survey publications — 

 so far as it concerns the subject of the present paper — is, in the main, as 

 follows :— 4, 5, and 6 : S. B. Wilkinson. 7 : B. N. Peach & S. B. Wilkinson. 

 9 : S. B. Wilkinson (Jura) & B. N. Peach (northern end of Jura, Scarba, etc.). 

 10: B. N. Peach. 11: S. B. Wilkinson. 12: E. B. Bailey. 13 and 14: 

 W. B. Wright & E. B. Bailey. 



EXPLANATION OF PLATE XII. 



Geological' map of Islay, Jura, etc. on the scale of 4 miles to the inch, or 

 1 : 253,440 ; with sections across those islands (not to true scale). 



[For ' Beinn Bahn ' read ' Beinn Bhan ' ; for ' Coillabas ' read ' Coillabus ' ; 

 for 'Dubh-Fheth' read 'Dubh-fheith.'] 



Discussion. 



Mr. G. Baeeow drew attention to the wide range of the Author's 

 observations ; with regard to the Moine Thrust, its position on the 

 published maps rendered its occurrence close to Islay impossible. 

 He agreed with the Author that there was a great break between 

 the main part of Islay and the western and almost detached part. 

 But, although there might be a fault as well, the changes seen in the 

 condition of the strata as regards crystallization were due mainly to 

 the thrust that passed along the Great Glen of the Caledonian Canal 

 and continued through the Islay area. As in the case of the Moine 

 Thrust, little-altered or non-crystalline rocks on the south-east 

 side of the Thrust were driven over or on to rocks that are 

 highly crystalline. Referring to his paper published by the Geolo- 

 gists' Association, and accompanied by a map in which the Highland 



1 The corners of these Sheets are shown on PI. XII. 



