Abstract

Beds whose fauna consists almost exclusively of graptolites and beds containing graptolites together with a normal benthos of trilobites, crinoids, and other organisms are represented in the Silurian strata of the Howgill Fells, extending from northwest Yorkshire into Westmorland, England. Depositional environments during sedimentation of the graptolitic mudstones and intervening beds are discussed in detail.

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