Vol. 69.] LOCH AWE SYNCLINE (ARGYLLSHIRE). 299 



(10) J. B. Hill.—' On the Crush-Conglomerates of Argyllshire' Q.J. G. S. vol.lvii 



(1901) p. 313. 



(11) P. Macnair. — 'The Building of the Grampians' Proc. Phil. Soc. Glasgow, 



vol. xxxiv (1903) p. 147. 



(12) 'Summary of Progress for 1901 ' Mem. Geol. Suit. 1902. 



(13) ' Summary of Progress for 1903 ' Mem. Geol. Surv. 1904. 



(14) ' The Geology of Mid- Argyll ' (Explanation of Sheet 37) Mem. Geol. Surv. 



Scot. 1905. 



(15) 'Summary of Progress for 1905 ' Mem. Geol. Surv. 1906. 



(16) ' The Geology of the Country near Oban & Dalmally ' ( Explanation of Sheet 45) 



Mem. Geol. Surv. Scot. 1908. 



(17) ' The Geology of the Seaboard of Mid-Argyll ' (Explanation of Sheet 36) Mem. 



Geol. Surv. Scot. 1909. 



(18) ' The Geology of Knapdale, Jura, & North Kintyre ' (Explanation of Sheet 28, 



with Parts of 27 & 29) Mem. Geol. Surv. Scot. 1911. 



(19) H. Dewey & J. S. Flett — 'On some British Pillow-Lavas & the Rocks 



Associated with them' Geol. Mag. dec. 5, vol. viii (1911) p. 202. 

 {20) E. B. Bailey & M. Macgregor — • The Glen Orchy Anticline (Argyllshire) ' 



Q. J. G. S. vol. Ixviii (1912) p. 164. 

 (21) G. Barrow. — 'Lower Deeside & the Highland Border' Proc. Geol. Assoc. 



vol. xxiii (1912) p. 268. 



VII. Appendix on the Stratigraphy. 



It is not the purpose of this paper to replace the detailed account 

 of the district already given in the Geological Survey Memoirs. At 

 thu same time, the following epitome of the stratigraphy is offered 

 for the convenience of workers in other parts of the Highlands. 

 This epitome is a compilation made in the light of personal know- 

 ledge. The whole district has been examined, except the part 

 situated in Cowal and, northwards, from Glen Shira to Meall nan 

 Tighearn. The Shira Limestone is dealt with more fully than the 

 other divisions, as it is impossible to extract an altogether satis- 

 factory account of it from the descriptions heretofore published ; 

 the differences, however, are all concerned with matters of detail. 



The Ardrishaig Phyllites and Erins Quartzite. 



The Ardrishaig Phyllites of the Loch Pyne and Craignish 

 districts consist of soft greenish-grey phyllites and phyllitic mica- 

 schists, in many parts containing calcareous lenticles half an inch 

 or less thick. Intermixed with these lenticles are occasional 

 thicker outcrops of pale-yellow, buff-coloured, and white limestone ; 

 and also bands of compact fine-grained quartzite, often slightly 

 calcareous. 



Small grains of blue quartz can at times be recognized in the 

 siliceous bands, while conglomeratic seams have been described 

 from the Loch Caolisport district by Mr. Clough and Mr. Grabham 

 [18, pp. 53, 54], and from an island in Loch Craignish by Mr. Maufe 

 [17, p. 13] ; but such occurrences are quite exceptional. 



In Cowal Mr. Clough has found a convenient lower limit to the 

 Ardrishaig Group in an outcrop of graphitic mica-schists, with 

 thin impure graphitic limestones and calcareous quartzites. This 

 assemblage is sometimes spoken of as the St. Catherine's Gra- 

 phite-Schist. Peyond comes the Garnetiferous Mica-Schist 



