The first discovery of crinoids and cephalopod hooklets in the British Triassic

Emma N.U. Landon, Christopher J. Duffin, Claudia Hildebrandt, Thomas G. Davies, Michael J. Simms, Michael J. Benton

Research output: Contribution to journalArticle (Academic Journal)

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Abstract

The Late Triassic Rhaetian stage is perhaps best known in south-west Britain for the bone beds of the Westbury Formation, but there are other fossil-rich horizons within this and the underlying Blue Anchor Formation. Samples from a borehole drilled at the Filton West Chord, and collected from exposures near Bristol Parkway railway station, have yielded significant fossil material from both of these formations. The assemblage recovered from the Blue Anchor Formation is similar to those from the lower Westbury Formation, yielding roughly equal proportions of chondrichthyans and osteichthyans. Assemblages recovered from the Westbury Formation are typical of those from the upper Westbury Formation, in being dominated by osteichthyans. The borehole samples have produced the first recorded evidence of crinoids in the British Triassic, and the first evidence of coleoid cephalopods, in the form of grasping hooklets, from the Rhaetian, and indeed the first from the British Triassic.
Original languageEnglish
Pages (from-to)360–373
Number of pages14
JournalProceedings of the Geologists' Association
Volume128
Issue number3
Early online date28 Apr 2017
DOIs
Publication statusPublished - Jun 2017

Keywords

  • Cephalopod hooklets
  • Crinoids
  • Chondrichthyes
  • Actinopterygii
  • Bristol
  • Rhaetian
  • Rhaetian bone bed
  • Westbury Formation
  • Blue Anchor Formation

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