On the Coniston Group

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Abstract
T he ‘Quarterly Journal of the Geological Society’ for 1865-66 (vol. xxii. p. 480) contains a memoir by the authors, titled “Additional Observations on the Geology of the Lake-Country.” In this memoir, after alluding to some new fossils from the Skiddaw-Slate group, and the occurrence of a fossiliferous ash-bed in the green slates and the porphyries in the Lake-country proper, the existence of several faults among the old rocks of this portion of England is indicated, and the total absence of strata containing characteristic Upper-Llandovery and Wenlock fossils is pointed out. The Kendal flags, the highest member of the Silurian series in the Lake-district, were also referred to as showing no distinct connexion with the older rocks lying to the north of them; and it was stated that these Kendal flags are probably brought against the older members of the Silurian rocks by means of faults. The object of the present communication is to point out the occurrence in the Lake-country of a new and unique horizon containing a rich Graptolite fauna in that portion of the Silurian series which has been termed by Prof. Sedgwick “the Coniston Flags,” to describe in detail these flags, to point out their relations, both physically and palæontologically, with the Coniston limestone below them and the Coniston grits above them, and by this means to add a great thickness of strata to the highest member of the Lower Silurian rocks as this member is represented in the British isles. The range of the Coniston limestone

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