220 Occurrence of Boulder Clay at Huddersfield. 



the upper part of the Calder, and especially to the valley of 

 the Aire, by Jowett and Muff* ; while to the south-east, the 

 Don area has been described by Lower Carter, f Up to the 

 present, geologists have paid little attention to the area drained 

 by the Colne and its tributaries. Kendall J says, ' The country 

 south of the Calder has been for many years a puzzle to the 

 glacial geologist. Its general aspect is that of an unglaciated 

 region, yet small sporadic patches of unmistakable glacial 

 deposits are scattered at wide intervals through the lower 

 ends of the valleys in the Don and Dearne drainage.' 



In the absence of any detailed account of such deposits 

 in the drainage area of the Colne, it may be well to place on 

 record such facts as have come to light during the excavations 



Fig. 1.— Junction of Lees Beck with the Colne. 



above referred to, and also in similar exposures elsewhere 

 in the neighbourhood. 



The principal excavations were on the wide alluvial flat 

 at the end of the spur separating the Colne from Lees Beck. 

 As might be expected in alluvial deposits, these showed great 

 variations in the composition of the beds within short distances. 



Fig. i shows the confluence of the streams. Lees Beck 

 on the left of the illustration, and the Colne, crossed by a 



* Jowett and Muff : ' Glaciation of the Bradford and Keighley Dis- 

 trict.' — Proc. Yorks. Geol. Soc, 1904-1905. 



f W. Lower Carter: 'Glaciation of the Don and Dearne Valleys.' 

 Proc. Yovks. Geol. Soc, 1905. 



\ P. F. Kendall, 'The Glacial Deposits' (of Yorkshire). Victoria 

 County History, York, Vol. I., p. 88, 1907. 



Naturalist; 



