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Geological Society, London, Special Publications; 1999; v. 160; p. 33-44;
DOI: 10.1144/GSL.SP.1999.160.01.04
© 1999 Geological Society of London

Manx Group Stratigraphy and Lithofacies

Macrofauna and ichnofauna of the Manx Group (early Ordovician), Isle of Man

P. J. Orr1, & M. P. A. Howe2

1 Department of Earth Sciences, University of Oxford, Parks Road, Oxford OX1 3PR
3 Department of Geology, National University of Ireland, Galway, Ireland
2 Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK

Within the Manx Group, the key elements of the limited macrofauna include a Rhabdinopora-like graptoloid from Cronk Sumark and a didymograptid-dichograptid fauna from Baltic Rock. The ichnofaunal assemblage is dominated by fodinichnia (mainly examples of Phycodes). This is atypical of Phanerozoic deep-marine environments as a whole, but is a feature of other early Ordovician deep-marine ichnofaunal assemblages, notably that within the Skiddaw Group of the English Lake District. Dictyodora zimmermani and Glockerichnus radiatus occur within the Manx Group; these ichnotaxa are present in other ichnofaunal assemblages of early Ordovician age which were also emplaced at high southerly palaeolatitudes.





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[Abstract] [PDF]