Middle Jurassic worm borings, and a new giant ichnospecies of Trypanites from the Bajocian-Dinantian unconformity, southern England

Alan Cole, Timothy John Palmer

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21 Citations (SciVal)

Abstract

The tilted Carboniferous Limestone in the eastern Mendips is transected by a remarkably planar unconformity, formed by the Bajocian transgression. The unconformity is riddled with borings, of which the most common ichnogenus , Trypanites, reaches densities in excess of 10 per cm2, Based on a marked bimodal size distribution they are classified as two ichnospecies: T. weisei (Magdefrau, 1932) and T.fosteryeo mani (ichnosp. nov.). The larger of these, T.fosteryeomani, is seen to penetrate to depths exceeding 400 mm. Central tubes observed in T. weisei, thought to represent a mould of the body of the Trypanites animal, are described. From these observations inferences concerning the mode of life are made.
Original languageEnglish
Pages (from-to)203-209
Number of pages7
JournalProceedings of the Geologists' Association
Volume110
Issue number3
DOIs
Publication statusPublished - 1999

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