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Cruziana: A stratigraphically useful trace fossil

Published online by Cambridge University Press:  01 May 2009

T. P. Crimes
T. P. Crimes
Affiliation:
Department Of Geology, The University, Liverpool 3.
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Summary

Cruziana semiplicata (Salter) is recorded, generally in abundance, from previously known and new localities within Upper Cambrian (Ffestiniog) sediments in Snowdonia, and the Portmadoc area, North Wales. C. furcifera (D'Orb) is recorded for the first time in the British Isles from four localities within Lower Ordovician (Arenig) sediments on St. Tudwal's Peninsula, North Wales.

It is shown that each of these species is of limited but different range, and it is suggested that they could be useful in distinguishing between otherwise unfossiliferous Cambrian and Ordovician strata.

Type
Articles
Information
Geological Magazine , Volume 105 , Issue 4 , August 1968 , pp. 360 - 364
Copyright
Copyright © Cambridge University Press 1968

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References

REFERENCES

Crimes, T. P. 1966. Palaeocurrent directions in the Upper Cambrian of North Wales. Nature, Lond., 210, 1246–7.CrossRefGoogle Scholar
Czarnocki, J. 1957. Stratygrafia i tektonika gof swietokrzyskich (Stratigraphy and Tectonics of the Swiety Kryzz Mountains). Prace I.G., 18.Google Scholar
Dzulynski, S. & Zak, C. 1960. Srodowisko sedymentacyjne piaskowcow Kambryjskich Wisniowki i ich stosunek do facji fliszowej. Annls Soc. géol. Pologne, 30, 213–241.Google Scholar
Fearnsides, W. G. 1912. Report of an excursion to the Portmadoc and Criccieth district of south-east Carnarvonshire. Proc. Geol. Ass., 23, 199–217.CrossRefGoogle Scholar
Lessertisseur, J. 1955. Traces fossiles d'activite animale et leur signification palaeobiologique. Mem. Soc. géol. Fr., 74.Google Scholar
Matley, C. A., Nicholas, T. C. & Heard, A. 1939. Summer field meeting to western part of the Lleyn Peninsula. Proc. Geol. Ass., 50, 83–100.CrossRefGoogle Scholar
Nicholas, T. C. 1915. The geology of the St. Tudwal's Peninsula, Caernarvonshire. Q. Jl geol. Soc., Lond., 71, 83–143.CrossRefGoogle Scholar
Radwanski, A. & Roniewicz, P. 1963. Upper Cambrian trilobite ichnocoenosis from Wielka Wisniokwa (Holy Cross Mountains, Poland). Acta Palaeont. Pol., 8, 259–275.Google Scholar
Ramsay, A. C. 1966. The geology of North Wales. Mem. Geol. Surv. U.K., 3.Google Scholar
Seilacher, A. 1960. Lebensspuren als Leitfossilien. Geol. Rdsch., 49, 41–50.CrossRefGoogle Scholar
Seilacher, A. 1964. Biogenic sedimentary structures. In Approaches to Palaeontology, edited by Imbrie, J. & Newall, N., 1 (New York, 1964).Google Scholar
Williams, D. 1930. The geology of the country between Nant Peris and Nant Ffrancon (Snowdonia). Q. Jl geol. Soc., Lond., 86, 191–233.CrossRefGoogle Scholar