Conglomerates underlying the Carboniferous Limestone. 7 



ates dips underneath the Carboniferous Limestone to the 

 north and north-east at a similar angle to that of the lime- 

 stone itselt, and rests unconformably on the Upper Silurian 

 rocks, etc., to the south and south-west. On the one-inch 

 map a narrow strip marked as Lower Limestone Shales is 

 shown parallel with this strip of conglomerates, and this at 

 once suggests a passage from, the Conglomerate Series into the 

 Carboniferous Limestone, which passage is borne out by the 

 field evidence. In these notes the writer has coupled together 

 the beds marked on the one-inch geological map as Basement 

 Conglomerates, and Lower Limestone Shales, and he has 

 described them as the ' Conglomerates underlying the Car- 

 boniferous Limestone.' The general relationship with regard 

 to the beds above and below, viz., conformity with the beds 

 above and unconformity with the beds below, is shown in the 

 sketch-map. 



For purposes of description it will be convenient to divide 

 the district into three portions as follows : — 



(i) Chapel Beck, Blind Beck and Micklegill Beck. 



(2) Birk Beck, Stakeley Beck, etc. 



(3) The Lune, Redgill, Ellergill Beck and Langdale 

 Beck. 



Each illustrates some interesting point with regard to the 

 deposits of this area. 



(i). Chapel Beck, Micklegill Beck and Blind Beck. — 

 Of these three becks flowing from the north. Chapel Beck 

 flow sinto the Lune and Micklegill Beck flows into Birk Beck, 

 which is itselt a tributary of the Lune, joining the latter at 

 Tebay village. Blind Beck is a very small stream flowing 

 between the two, and only introduced to show the continuity 

 01 the sections. These three becks have been linked together 

 because their sections are similar, and because they show a 

 passage from the Conglomerate Series into the Carboniferous 

 Limestone. Both Micklegill Beck and Chapel Beck give 

 good workable sections, the former being perhaps the more 

 straightforward. 



{a) In Micklegill Beck, just above and below the position 

 where it is crossed by the railway, deep red sandstones are 

 exposed, dipping 8° N. 24° E. These sandstones are well 

 bedded, and the harder bands form well marked ledges and 

 falls in the stream. About 80 yards above the railway 

 crossing, and overlying these red sandstones, is a band of 

 red conglomerates, fairly coarse, with pebbles up to 5 in. 

 across, rounded and sub-angular. This conglomerate forms 

 the bed of the stream for about another 80 yards, when it 

 is overlain by red sandstones dipping 8° N. i5° E. These red 

 sandstones are similar to those mentioned above, but perhaps 

 slightly finer in grain, and they form the bed of the stream 



1921 Jan. 1 



