Tagasi otsingusse
Cole & Palmer, 1999

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

Cole, A. R., Palmer, T. J.
DOI
DOI10.1016/S0016-7878(99)80070-4
Aasta1999
AjakiriProceedings of the Geologists' Association
Köide110
Number3
Leheküljed203–209
Tüüpartikkel ajakirjas
Keelinglise
Id6543

Abstrakt

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 cm- , Based on a marked bimodal size distribution they are classified as two ichnospecies: T. weisei (Mägdefrau, 1932) and T. fosteryeomani (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.

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