What is the biostratigraphic value of the ichnofossil Oldhamia for the Cambrian: a review

Herbosch, A.; Verniers, J.

log in

Publicaties | Kaarten

nieuwe zoekopdracht

[ meld een fout in dit record ]

mandje (0): toevoegen | toon

What is the biostratigraphic value of the ichnofossil Oldhamia for the Cambrian: a review

Herbosch, A.; Verniers, J. (2011). What is the biostratigraphic value of the ichnofossil Oldhamia for the Cambrian: a review. Geol. Belg. 14(3-4): 229-248

In: Geologica Belgica. Geologica Belgica: Brussels . ISSN 1374-8505; e-ISSN 2034-1954, meer

Beschikbaar in	Auteurs
VLIZ: Open access 241164 [ download pdf ]

Trefwoorden

Argentina
Belgium, Ardenne
Canada, Newfoundland
Canada, Northwest Terr., Ellesmere I.
Canada, Nova Scotia
Canada, Quebec
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Cambrian
USA, Alaska
USA, Maine
USA, Massachusetts
USA, New York
Ichnofossil
Alaska [Marine Regions]; Ardennen [Marine Regions]; Argentina [Marine Regions]; China [Marine Regions]; Ellesmere Island [Marine Regions]; Ireland [Marine Regions]; Maine [Marine Regions]; Massachusetts [Marine Regions]; Morocco [Marine Regions]; New York [Marine Regions]; Newfoundland and Labrador [Marine Regions]; Nova Scotia [Marine Regions]; Poland [Marine Regions]; Quebec [Marine Regions]; South Africa [Marine Regions]
Marien/Kust; Zoet water

Author keywords

Biostratigraphy, Cambrian agronomic revolution, palaeogeography, Avalonia, Gondwana

Auteurs		Top
Herbosch, A. Verniers, J.

Abstract

We have undertaken an exhaustive review of the literature to check if the ichnogenus Oldhamia could be used as a biostratigraphical tool in the Cambrian. On the 19 occurrences observed worldwide and positioned in the recent global chronostratigraphy of the Cambrian, only 16 have a time range sufficiently precise to constrain the stratigraphic interval during which the organisms producing Oldhamia lived in the Cambrian. They are clearly distributed in two age groups: a “younger” group of 14 occurrences shows a very well constrained time range from the base of Stage 3 to the three quarter of Stage 5 and an “older” group of 2 occurrences shows a poorly constrained time range which seems restricted to the Fortunian. With this contrasting situation we propose two alternative interpretations: in the first we accept all the results and in the second, more restrictive, we reject the age of the “older” group as scientifically insufficiently substantiated. Oldhamia can only be used as a stratigraphic tool in the second interpretation: it appears in the upper part of Stage 2, shows an acme in Stage 3 and 4 and rapidly disappears during Stage 5. This rapid disappearance could be interpreted as the arrival of the Cambrian agronomic revolution in the deep marine setting. The overview also shows that this ichnogenus has a cosmopolitan distribution.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid

Top | Auteurs