340 



Prof. H. A. Nicholson and J. E. Marr — 



have usually been grouped together under the name of the " Borrovsr- 

 dale Series " (the " Green Slates and Porphyries " of Prof. Sedg- 

 wick) ; though it may be taken as certain that this name covers 

 more than one series of volcanic ejecta. Up to the pi^esent time, no 

 strata containing fossils have been detected in connection with 

 any of the rocks which have been included under the general title 

 of the " Borrowdale Series," The object of the present communi- 

 cation, however, is to draw attention to a group of fossiliferous shales 

 which we have found to be associated with certain of these volcania 

 rocks. 



The shales in question occur on the north side of the great mass 

 of the Skiddaw Slates of the Lake-district, in what has been spoken 

 of as the " Caldbeck Fells Area "; and their general position will be 

 made clear by the accompanying sketch-map. 



cklotSkck Felt 



Stetcli-map of Carrock Pike and the district immediately round it, on the scale of 

 one inch to a mile. (The boundaries of the intrusive igneous rocks are in part 

 taken from Mr. Clifton Ward.) S. Skiddaw Slates, for the most part highly 

 metamorphosed; d. Drygill Shales; e. Lavas and ashes ("Eycott Series"); 

 c. Carboniferous rocks ; g. Granite. G. Gabbro (the " hypersthenite " of Mr. 

 "Ward) ; B. Intrusive diorite (?) ; F. Sphserulitic felsite. 



The main area of the Skiddaw Slates in the Lake-district, as is 

 well known, is followed to the south by the main area of the so- 



