266 ME. W. B. WATT (Xtf THE GEOLOGY [June 1914, 



10. The Geology of the Countey around Huntly (Abebdeen- 

 shiee). By William Robebt Watt, M.A., B.Sc, F.G.S. 

 (Eead January 21st, 1914.) 



[Plates XXX VIII-XL.] 



Contents. 



Page 



I, Introduction 266 



II. The Foliated Series 267 



III. The Non-Foliated Igneous Eocks 269 



(1) General Characteristics. 



(a) The Norite Group. 



(b) The Central Intrusion. 



(c) The Carvichen Granitite. 



(d) The Hypabyssal Eocks. 



(2) Petrography. 



(a) The Bytownite-Norite. 



(b) The Gabbro-Picrite Group. 



(c) The Eocks of the Central Intrusion. 



(d) The Carvichen Granitite. 



(e) The Hypabyssal Eocks. 



IV. Contact-Metamorphism 279 



(a) The Foliated Eocks. 



(b) The Hornblende-Andesine Eock. 



(c) Cordierite-Norites and their Allies. 



V. Conclusions 291 



I. IlSTEOLUCTIOIsr. 



The district of which the geology is here described lies north and 

 west of the Burgh of Huntly in Western Aberdeenshire. The 

 general form of the area and its boundaries can be seen in the 

 accompanying map (PL XL), which, with a few exceptions, 

 includes all the localities mentioned in the following pages. 

 Allrick Hill and the Grlen Burn lie west of Clashmach Hill ; 

 the Hill of Milleath and ' Torry hillock ' lie west of Broadland 

 and Drumdelgie ; Midplough lies north-east of Rothiemay Station 

 and east of the Deveron. 



With the superficial deposits this paper is scarcely concerned. 

 The depression situated east of the high ground of Mungo, Hill 

 of Kinnoir, and Battlehill, occupies the site of a former lake, and 

 the thick deposit of clay hides the junctions along the hollow. 

 Round Huntly many pits have been opened in the river-gravels 

 deposited by the Bogie and the Deveron. Boulder Clay and 

 glacially-striated rock-surfaces occur sparingly. 



