Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

Geological Magazine

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by EGENHOFF, S. O. Articles by MALETZ, J. Search for Related Content GeoRef GeoRef Citation

Biostratigraphic precision of the Cruziana rugosa group: a study from the Ordovician succession of southern and central Bolivia

SVEN O. EGENHOFF^*,*, BERND WEBER, OLIVER LEHNERT and JÖRG MALETZ

^* Colorado State University, Department of Geosciences, 322 Natural Resources Building, Fort Collins, CO 80523-1482, USA
Freie Universität Berlin, Institut für Geologische Wissenschaften, Fachrichtung Geologie, Malteserstrasse 74-100, D-12249 Berlin, Germany
University of Erlangen, Institute of Geology and Mineralogie, Schlossgarten 5, D-91054 Erlangen, Germany
Department of Geology, State University of New York at Buffalo, 772 Natural Sciences and Mathematics Complex, Buffalo, New York 14260-3050, USA

^* Author for correspondence: sven{at}warnercnr.colostate.edu

Cruziana ichnospecies have been repeatedly reported to have biostratigraphic significance. This study presents a re-evaluation of the arthropod ichnotaxa of the Cruziana rugosa Group from bio- and/or lithostratigraphically well-defined Lower to Upper Ordovician siliciclastic sections of southern and central Bolivia. With the exception of Cruziana rouaulti, the ichnofaunas contain all the members of the Cruziana rugosa Group throughout the Ordovician (Arenig to Caradoc) successions in Bolivia. The Bolivian material therefore indicates that these arthropod ichnofossil assemblages are suitable for recognizing Ordovician strata in Bolivia. These findings cast doubt on their use as reliable indicators for a global intra-Ordovician (Arenig to Caradoc) biozonation of Peri-Gondwanan sedimentary successions.

Key Words: Cruziana • biostratigraphy • Bolivia • Ordovician

This article has been cited by other articles:

				N. S. Davies and I. J. Sansom Ordovician vertebrate habitats: A Gondwanan perspective Palaios, October 1, 2009; 24(10): 717 - 722. [Abstract] [Full Text] [PDF]