Vol. 68.] GLACIATION OP THE BLACK COMBE DISTRICT. 



417 



which introduced the Upper Boulder Clay. These events will be 

 •discussed more full}' at a later stage. 



Some of the inland sections where the Lower Boulder Clay rises 

 up the flanks of the hills, and refts upon granite, volcanic rocks, or 

 slate, will now be described. These sections show the dovetailing 

 of drifts of distant and of strictly local origin ^ ; but this, as I 

 have shown above (p. 411), does not in all cases imply an inter- 

 mixture of Irish-Sea and Lake-District drift. 



(2) The Inland Sections. 



(i) North of Boo tie. — Upon the granitic tract north-east 

 of Bootle the drift which passes for Boulder Clay is largely 

 •composed of granitic debris, and is difiicult to separate from the 

 later fluvioglacial sands and gravels. It contains included 

 streaks of red loamy clay in a few places, with, among others, 

 ■small boulders of St. Bees Sandstone (Park Nook, near Bridge End). 

 In the later fluvioglacial gravels of this area, formed chiefly from 



N. 



Fig. 3. — Section of Boulder Clay near Fell Green, Bootle, 

 loohwg eastwards. 



S. 



,[l=:Rusty coloured sand ; 2= Yellowish-red or brown, rather sandy clay, with 

 reel clayey patches ; 3=::Grrey-brown sandy clay, with fairly numerous 

 Skiddaw Slate fragments : some parts gravelly ; 4=;Red sandy loam.] 



washed and re-sorted Lower drift, boulders of St. Bees Sandstone 

 were also found, a little farther east than Corney. The valley of 

 the Kinmont Beck east of Low Kinmont was filled with drift 

 ■chiefly of granitic origin, sometimes of a clayey but more often of 

 a loose texture. The head of Damkirk Beck, a mile east-north- 

 east of Bootle, is cut partly in a rich red Triassic boulder-clay 

 with greyish patches of granitic debris. 



Dovetailing of the drifts is well shown in a section at the head 

 of the Fell Eoad to Broughton, about 150 yards south-east of Fell 

 Green, east of Bootle (fig. 3). Granites are common in this section, 

 and there is the usual suite of volcanic rocks, among them an 



1 For a comparison, see the description of the lateral moraine of the Von 

 Post Glacier, Spitsbergen, by Mr. G. W. Lamplugb in 'The Shelly Moraine of 

 ithe Sefstrom Glacier, &e. ' Proc. Yorks. Geol. Soc. vol. xvii, pt. iii (1911-12) 

 j)p. 237-38. 



