Hostname: page-component-76fb5796d-5g6vh Total loading time: 0 Render date: 2024-04-26T08:20:10.268Z Has data issue: false hasContentIssue false
  • English
  • Français

The Nærsnes section, Oslo Region, Norway: trilobite, graptolite and conodont fossils reviewed

Published online by Cambridge University Press:  01 May 2009

D. L. Bruton ,
L. Koch  and
J. E. Repetski
D. L. Bruton
Affiliation:
Paleontologisk Museum, Sars gate 1, 0562, Oslo 5, Norway
L. Koch
Affiliation:
Paleontologisk Museum, Sars gate 1, 0562, Oslo 5, Norway
J. E. Repetski
Affiliation:
U.S. Geological Survey, E-501, U.S. National Museum, Washington, D.C. 20560, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

New collections of trilobites, graptolites and conodonts, the latter figured for the first time, have been made from an unbroken, uniform sedimentary succession across the Cambrian–Ordovician Boundary. The zonal conodont Cordylodus proavus first appears in undoubted pre-Tremadoc strata. Additional conodonts show that the base of the Tremadoc lies within beds correlative with the Symphysurina Zone of North America and at a level above the base of the Hirsutodontus simplex subzone of the C. proavus Zone. Cordylodus lindstromi and Iapetognathus preaengensis first appear at the base of the Tremadoc. The olenid trilobite Jujuyaspis occurs in the same lower Tremadoc interval and has great potential for interregional correlation.

Type
Articles
Information
Geological Magazine , Volume 125 , Issue 4 , July 1988 , pp. 451 - 455
Copyright
Copyright © Cambridge University Press 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Aldridge, R. J. 1984. Thermal metamorphism of the Silurian strata of the Oslo region, assessed by conodont colour. Geological Magazine 121, 347–9.CrossRefGoogle Scholar
Bruton, D. L., Erdtmann, B.-D., & Koch, L. 1982 a. The Nærsnes section, Oslo Region, Norway: a candidate for the Cambrian–Ordovician boundary stratotype at the base of the Tremadoc Series. In The Cambrian–Ordovician Boundary: Sections, Fossil Distributions and Correlations (ed. Bassett, M. G., Dean, W. T.), pp. 61–9. National Museum of Wales, Geological Series no. 3, Cardiff.Google Scholar
Bruton, D. L., Erdtmann, B.-D., & Koch, L. 1982 b. IV International Symposium on the Ordovician System, Field Excursion Guide (ed. Bruton, D. L., Williams, S. H.), pp. 110–15. Paleontological Contributions from the University of Oslo, no. 279.Google Scholar
Jun-Yuan, Chen & We-Li., Gong 1986. Conodonts. In Aspects of Cambrian–Ordovician Boundary in Dayangcha, China (ed. Jun-Yuan, Chen), pp. 93–223, pl. 17–54. Beijing: China Prospect Publishing House.Google Scholar
Derby, J. R. 1986. Great progress but no decision by the Cambrian–Ordovician boundary committee. Palaios 1, 98–103.CrossRefGoogle Scholar
Erdtmann, B.-D. 1982. A reorganisation and proposed phylogenetic classification of planktic Tremadoc (early Ordovician) dendroid graptolites. Norsk Geologisk Tidsskrift 62, 121–44.Google Scholar
Fortey, R. A., Landing, E. & Skevington, D. 1982. Cambrian–Ordovician boundary sections in the Cow Head Group, western Newfoundland. In The Cambrian–Ordovician Boundary: Sections, Fossil Distributions and Correlations (ed. Bassett, M. G., Dean, W. T.), pp. 95–129. National Museum of Wales, Geological Series no. 3, Cardiff.Google Scholar
Henningsmoen, G. 1957. The trilobite family Olenidae with description of Norwegian material and remarks on the Olenid and Tremadoc Series. Skrifter Det Norske Vitenskaps-Akademi i Oslo, (1. Mat.-Naturv. Klasse) 1957, no. 1, 1–303, pls. 1–31.Google Scholar
Legrand, P. 1985. Dictyonema-Rhabdinopora. Norsk Geologisk Tidsskrift 65, 224–5.Google Scholar
Miller, J. F. 1978. Upper Cambrian and Lowest Ordovician conodont faunas of the House Range, Utah. In Upper Cambrian to Middle Ordovician Conodont Faunas of Western Utah (ed. Miller, J. F.). S.W. Missouri State University Geoscience Series, no. 5, pp. 1–33.Google Scholar
Miller, J. F. 1980. Taxonomic revisions of some Upper Cambrian and Lower Ordovician conodonts with comments on their evolution. Paleontological Contributions Paper, University of Kansas 99, 1–39.Google Scholar
Miller, J. F., Taylor, M. E., Stitt, J. H., Ethington, R. L., Hintze, L. F. & Taylor, J. F. 1982. Potential Cambrian-Ordovician Boundary stratotype sections in the Western United States. In The Cambrian–Ordovician Boundary: Sections, Fossil Distributions and Correlations (ed. Bassett, M. G., Dean, W. T.), pp. 155–80. National Museum of Wales, Geological Series no. 3, Cardiff.Google Scholar
Nikolaisen, F. & Henningsmoen, G. 1985. Upper Cambrian and Lower Tremadoc olenid trilobites from the Digermul Peninsula, Finnmark, northern Norway. Bulletin of Norges Geologiske Undersokelse 400, 1–49.Google Scholar
Rushton, A. W. A. 1982. The biostratigraphy and correlation of the Merioneth–Tremadoc Series boundary in North Wales. In The Cambrian–Ordovician Boundary: Sections, Fossil Distributions and Correlations (ed. Bassett, M. G., Dean, W. T.), pp. 41–59. National Museum of Wales, Geological Series no. 3, Cardiff.Google Scholar
Taylor, M. E., Repetski, J. E. & Sprinkle, J. 1981. Paleontology and biostratigraphy of the Whipple Cave Formation and Lower House Limestone, Sawmill Canyon, Egan Range, Nevada. In Second International Symposium on the Cambrian System, Guidebook for Field Trip 1. (ed. Taylor, M. E. Palmer, A. R.): Cambrian stratigraphy and paleontology of the Great Basin and vicinity, Western United States, pp. 73–7.Google Scholar