On some well-defined Life-zones in the Lower Part of the Silurian (Sedgwick) of the Lake-district

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Abstract
T he following paper treats of the different zones of fossils occurring in the strata between the Coniston Limestone and the Coniston Grits of the Lake-district, with the view of correlating the beds in the more central part of the district with those of the outlying districts in the neighbourhood of the Pennine chain, and of establishing the position of the boundary between the Cambrian and Silurian formations. This boundary, as indicated by the palæontological evidence, coincides with the position already assigned to it by Prof. Hughes, from the study of the district east of the river Lune (Geol. Mag. vol. iv. no. 8).

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