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II.—Marine Beds in the Yorkshire Coal-measures above the Barnsley Coal

Published online by Cambridge University Press:  01 May 2009

Extract

In Green's “Geology of the Yorkshire Coalfield” (Mem. Geol Surv., 1878, p. 471) reference was made to the occurrence below the Ackworth rock of a band of black shale, which it was said “contains Aviculopecten in plenty, and shows that incursions of the sea continued to occur even up to these comparatively late portions of the Coal Measure period.”

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1908

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