205. 



THE CONGLOMERATES UNDERLYING 



THE CARBONIFEROUS LIMESTONE IN THE N.W. 



OF ENGLAND. 



J. A. BUTTERFIELD, M.SC, F.G.S. 



(Continued from p. 1/2 J. 



(3). — The Lune, Redgill, Ellergill Beck and Lang- 

 dale Beck. 



These becks are chiefly interesting in showing the extension 

 of the red sandstones in the eastern part of this area. 



((?) The Lime. In the bed of the Lnne under Tebay 

 Bridge red sandstones are well displayed, and can be traced 

 for some distance down stream, though they eventually become 

 hidden by river deposit. Upstream there are no exposures 

 until about 50 yards above the ford leading to Coalflatt Hall, 

 when they again form the bed of the river. The sandstones 

 here are well jointed, but the dip is only obtained with diffi- 

 culty. It conforms, however, with the dips in other parts. 

 Higher up the river the sandstones run out, but the exact point 

 cannot be found owing to the large accumulation of pebbles, 

 etc., from the boulder clay forming the banks at this point. 

 One very interesting observation was, however, made a little 

 higher upstream, for in the river bank, close to Raisgill Hall 

 Bridge, a dark-brown sandy rock was found, overlain by about 

 4 feet of purple and blue mottled shaly sandstone, and finally 

 overlain by a brown sandy limestone. Thirtv yards below 

 the bridge the above purple and blue mottled sandstone 

 forms the bed of the river, and in the quarry to the north-west 

 of Raisgill Hall the dun -coloured limestone is exposed dipping 

 10^ N. 25° E. Here, therefore, is proof of the extension of the 

 beds at the top of Micklegill Beck and Chapel Beck, for this 

 dark sandy rock exposed here is no doubt the same as that 

 recorded previoush^ in these notes. as a mudstone. The Lune 

 beyond this yielded no further exposures. 



{b) Red'^ill. Just above the farm, on the left hand side 

 going up, there is an exposure of red sandstones well bedded, 

 but not sufficiently exposed to obtain reliable dip. A hundred 

 yards or so above the farm is a second exposure and still a 

 third higher up again. All these three exposures are of 

 sandstone. In the beck above Gaisgill Row a similar 

 exposure of red sandstone occurs about 100 yards above the 

 farm, and the reading of dip obtained here was 8° N. 10° E. 

 The beck above Gaisgill gives similar evidence. The name 

 Redgill is very fitting for -any of these gills, for they are 

 veritable red gills with their steep banks ot deep red incoherent 

 sands. 



1021 June 1 



