524 PKOr. E. J. GA.E^YOOD OISI THE LOWEE CAEBOIflEEROtTS [DeC. I 912, 



The Upper Dihunophyllum Sub-zone crops out west of 

 Hutton Eoof, where the beds are seen dipping steeply to the Hutton 

 Eoof Fault. They consist of the usual dark limestones, and contain 

 Productus latissimus and the following characteristic fossils : — 



Lithostrotion irregiolare (Phill.). 

 Lithostrotion junceura (Fleming). 



Caninia cf. cylindrica (Scoiilei-) ; 



Humphrey Head form. 

 Bihunophylhom muirlieadi Nich. 



Thomson. 



East of Hutton Eoof we find another good sequence of the upper 

 zones. The Lower Productus corrur/ato-7iemis2:)Jiericics Zone crops out 

 in a small cliff, on the north side of the road from Kirkby Lonsdale 

 to Lupton Beck, which is bounded on the north by a continuation 

 of the eastern Lupton Fault. The Nematophyllum -minus Beds are 

 not well exposed ; but the beds of the Lower Dibunopliyllum Sub- 

 zone make, as usual, a considerable feature to the south of the road. 

 They are also well exposed in the liiver Lune below the bridge. 



The dark limestone at the base of the Upper Dihunopliyllum 

 Sub-zone crops out again in the neighbourhood of Sellet Mill ; 

 here the beds are extremely fossiliferous, and contain, among 

 others, the following species : — 



Aido-phyUum cf. pachyendothecum 



Thomson. 

 Caninia cf. cylindrica (Scouler). 

 Dihunopliyllum midrheadi Nich. 



Thomson. 

 Zaphrentis ennisJcillein Ed. & H. 



Frod'uctm cf. antiguatiis Shy. 

 Productus edelburgensis Phill. 

 Prod,uctus latissimus Sby. 

 Producttos semireticidatus Mart. 

 Prodmctus sidcatus Sby. 

 Schizophoria resupinata (Mart.). 

 i Spirifer triangularis Mart. 



Martinia ovalis (Phill.). 



Sections along the Dent Fault. 



In the area between the Kirkby Lonsdale and Eavenstonedale 

 districts the Carboniferous rocks have been denuded from the 

 surface, as the result of the uplift on the north-west side of the 

 Dent Fault. With the exception of the outliers east of Kendal 

 already described, the only patches of Carboniferous rocks serving 

 to connect these districts are found in the tributaries of Hebble- 

 thwaite Gill and in the Eiver Clough east of Sedbergh. Throughout 

 the greater part of the district traversed by the Dent Fault, its 

 north-western margin is bordered by rocks of pre-Carboniferous 

 age, while the southern side of the fault is occupied, for the most 

 part, by Yoredale Beds. The presence, however, of some of the 

 lower zones, preserved on the upthrow side of the fault in these 

 sections, is of importance, since it affords valuable evidence 

 regarding the date of the Carboniferous submergence of this portion 

 of the ]^orth- Western Province. 



In Norgill, the northern tributary of Hebblethwaite Gill, the 

 Polygenetic Conglomerate, which is here crowded with blocks of 

 Keisley Limestone, is succeeded by compact cementstones and dark 

 calcareous shales. Some of these shaly layers contain plant-remains 



