688 ME. J. E. MAJIR AND DR. H. A. NICHOLSON 



Yewdale Beck. 



Just east of the "Waterhead Hotel another great north- and-south 

 fault, ranging down Coniston Lake, shifts the heds to the north a 

 distance of nearly a mile, and accordingly we again meet with the 

 Stockdale Shales in Yewdale Beck, which flows through the Yew- 

 dale Yalley west of Tarn Hows Wood, in a south-westerly direction, 

 and consequently parallel with the strike of the beds, which between 

 Sunny Brow and Broughton Mills is north-east and south-west 

 instead of east-north-east to west-south-west. At this point are some 

 saw-mills, which are about half a mile north of Coniston church ; 

 and above the weir belonging to these mills the DimorpTiograjptus- 

 confertus beds are seen striking slightly obliquely across the stream, 

 and are again met with some yards higher up after crossing a 

 meadow. There is an apparent thickness here of at least 50 feet ; 

 but an examination of the beds suggests much repetition. They 

 occur in a series of lenticular masses, so as to produce a simulation 

 of false-bedding, and the beds are extremely indurated, the lamina- 

 tion-planes being marked with minute wrinklings, which render the 

 fossils, abundant enough, generally undeterminable. We recognized 

 Monograptus revolutus^ Kurck, and M. tenuis, Portl. A strike-fault 

 ranges along the south-east bank of the stream and brings the 

 Middle Skelgill Beds against the Dimorphoc/raptus-heds, cutting out 

 the lower portion of the middle group, so that the zones of Mono- 

 graptus Jimhriatus, Encrinurus punctatus, Monograptus ay^genteus, 

 and part of the zone of Phacops gJaber are absent. The upper part 

 of the PJiacops-gl ether zone is seen passing into the convolutus-heds, 

 of the usual appearance, and containing the usual fossils ; but the 

 summit of this bed is not seen at any accessible point, and, indeed, 

 the next beds we were able to examine were those belonging to the 

 zone of Acidasjyis erinaceus, which were seen passing up into the 

 Browgill Beds. 



Following the beck to the cluster of houses known as the Par 

 End another exposure is reached where the beck turns sharply to 

 the south-south-east, and the Stockdale Shales leave the beck and 



Fig. 5. — Section at Far End, Yewdale BecJc. 

 (Scale 12 feet to 1 inch.) 



Ac 4 



Ac 2 Ac3 



strike across the drift-covered country in the direction of the rail- 

 way-station. At this turn of the stream the above section is met 

 with (fig. 5). The Ampya^-zone (4 feet seen) is succeeded by the 



