. Geological magazine. (Llanvirn Series) is reached. Between thesetwo horizons are placed the thick and varied volcanic rocks which. 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 coversmore than one series of volcanic ejecta. Up to the pi^esent time, nostrata containing fossils have been detected in connection withany of the rocks which have been included under the general titleof the Borrowdale Series, The object of t
. Geological magazine. (Llanvirn Series) is reached. Between thesetwo horizons are placed the thick and varied volcanic rocks which. 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 coversmore than one series of volcanic ejecta. Up to the pi^esent time, nostrata containing fossils have been detected in connection withany of the rocks which have been included under the general titleof the Borrowdale Series, The object of the present communi-cation, however, is to draw attention to a group of fossiliferous shaleswhich we have found to be associated with certain of these volcaniarocks. The shales in question occur on the north side of the great massof the Skiddaw Slates of the Lake-district, in what has been spokenof as the Caldbeck Fells Area ; and their general position will bemade clear by the accompanying sketch-map. cklotSkck Felt. Stetcli-map of Carrock Pike and the district immediately round it, on the scale ofone inch to a mile. (The boundaries of the intrusive igneous rocks are in parttaken from Mr. Clifton Ward.) S. Skiddaw Slates, for the most part highlymetamorphosed; d. Drygill Shales; e. Lavas and ashes (Eycott Series);c. Carboniferous rocks; g. Granite. G. Gabbro (the hypersthenite of ) ; B. Intrusive diorite (?) ; F. Sphserulitic felsite. The main area of the Skiddaw Slates in the Lake-district, as iswell known, is followed to the south by the main area of the so- New Fossili/erous Horizon in the Lahe-didrict. 341 •called Borrowdale rocks, while it is flanked on tlie north, and north-east by a narrow strip of volcanic rocks which runs from EycottHill near Troutbeck Station, through the range of the Caldbeck Fells,to Binsey Crag and Torpenhow Common. The upward sequence ofthe volcanic rocks of the Caldbeck Fells is concealed from view bythe overlapping Carboniferous Limes
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1864
