Abstract
THE Wet Sleddale extension of Manchester Corporation Waterworks' Haweswater scheme in Westmorland has involved the excavation of a tunnel, 4,000 ft. in length, to the west of Shap village. Excavated materials on the tips at both ends of the tunnel are principally grey-black shales and mudstones of the Skiddaw Group which have provided an abundant, well-preserved graptolite fauna. The fact that the collections have been made from the tip heaps is unlikely to detract from their value since a preliminary examination suggests that the bifidus zone alone is represented. This accords with the general position of the tunnel in the Skiddaw Group inlier hereabouts and with the presence in the tunnel of massive bands of reworked sand and tuffaceous material interbedded with the shales and mudstones. The tuffs can be compared with the mottled tuffs of the Lake District, and the situation as a whole recalls the Flagdaw-type interbedded slates and volcanics of the Cross Fell inlier.
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Elles, G. L., Summ. Prog. Geol. Surv. Great Britain for 1932, 5, 94 (1933).
Jackson, D. E., Geol. Mag., 98, 515 (1961).
Jackson, D. E., J. Palæont., 36, 300 (1962).
Bulman, O. M. B., Palæontology, 1, 159 (1958).
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SKEVINGTON, D. A New Occurrence of the Didymograptus bifidus Zone in the Skiddaw Group. Nature 202, 585 (1964). https://doi.org/10.1038/202585a0
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DOI: https://doi.org/10.1038/202585a0
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