An Early Ordovician (Floian) Conodont Fauna from the Eastern Cordillera of Peru (Central Andean Basin)

J.C. GUTIÉRREZ-MARCO, G.L. ALBANESI, G.N. SARMIENTO, V.S. CARLOTTO CAILLAUX

Abstract


Late Floian conodonts are recorded from a thin limestone lens intercalated in the lower part of the San José Formation at the Carcel Puncco section (Inambari River), Eastern Cordillera of Peru. The conodont association includes Gothodus costulatus LINDSTRÖM, Protopanderodus rectus (LINDSTRÖM), Drepanoistodus basiovalis (SERGEEVA), Drepanoistodus forceps (LINDSTRÖM), Drepanodus arcuatus PANDER, Trapezognathus diprion (LINDSTRÖM), Erraticodon patu COOPER, and Ansella cf. jemtlandica (LÖFGREN). This species association can be assigned to the upper part of the well-documented Oepikodus evae Zone. It is the northernmost conodont record of late Floian age in South America. This study updates the preliminary data presented in 2001 from this fossil locality, and it has important consequences for the paleogeographic reconstruction of the Peruvian part of the Central Andean Basin. In accordance with trilobites and brachiopods documented for the same strata, the conodont association represents a relatively cold-shallow-water platform environment. The record of late Floian conodonts towards the middle part of the San José Formation shows that the base of this unit in the studied section is considerably older than other sections of the distribution area, where its lowermost part is dated as early Darriwilian by the record of graptolites from the Undulograptus austrodentatus graptolite Zone. The diachronous initiation of the marine sedimentation makes the lower part of the Carcel Puncco shales penecontemporaneous with the volcanigenic rocks related with the Arequipa Massif, which transitionally underlie the San José Formation in other places of the Altiplano and the Eastern Cordillera of Peru.

Keywords


Conodonts; Lower Ordovician; Paleogeography; Gondwana; Peru

Full Text:

PDF


DOI: http://dx.doi.org/10.1344/105.000000248

Refbacks

  • There are currently no refbacks.




Geoscience e-Journals

 

Previous

 

Random

 

Next

 

List

 


This work is licensed under a Creative Commons Attribution-ShareAlike License.
Geologica Acta (ISSN-1695-6133)
Biblioteca de Geologia (UB-CSIC) | Facultat de Ciències de la Terra, Martí i Franquès s/n 08028 Barcelona | Spain
Phone: +34 93 403 19 89 | Fax: +34 93 402 14 21 | E-mail: geologica-acta@ictja.csic.es
{"cc_re__cc_re__cc_by_sa_4_0": ["link/rand.pl?ringid=journals;siteid=GA\" target=\"_top\">Random</a><p>\u00a0</p></td><td class=\"cellGeJ\"><a class=\"GeJ\" href=\"http://www.univ-brest.fr/geosciences/ringlinks/cgi-bin/ringlink/next.pl?ringid=journals;siteid=GA\" target=\"_top\">Next</a><p>\u00a0</p></td><td class=\"cellGeJ\"><a class=\"GeJ\" href=\"http://www.univ-brest.fr/geosciences/ringlinks/cgi-bin/ringlink/list.pl?ringid=journals;siteid=GA\" target=\"_top\">List</a><p>\u00a0</p></td></tr></tbody></table></div><!-- BOTTOM Geoscience e-Journals code --> <a href=\"http://creativecommons.org/licenses/by-sa/4.0/\" rel=\"license\"><img style=\"border-width: 0;\" src=\"https://i.creativecommons.org/l/by-sa/4.0/80x15.png\" alt=\"Creative Commons License\" /></a><br />This work is licensed under a <a href=\"http://creativecommons.org/licenses/by-sa/4.0/\" rel=\"license\">Creative Commons Attribution-ShareAlike License</a>.<hr />Geologica Acta (ISSN-1695-6133)<br />Biblioteca de Geologia (UB-CSIC) | Facultat de Ci\u00e8ncies de la Terra, Mart\u00ed i Franqu\u00e8s s/n 08028 Barcelona | Spain<br />Phone: +34 93 403 19 89 | Fax: +34 93 402 14 21 | E", "Next</a><p>\u00a0</p></td><td class=\"cellGeJ\"><a class=\"GeJ\" href=\"http://www.univ-brest.fr/geosciences/ringlinks/cgi-bin/ringlink/list.pl?ringid=journals;siteid=GA\" target=\"_top\">List</a><p>\u00a0</p></td></tr></tbody></table></div><!-- BOTTOM Geoscience e-Journals code --> <a href=\"http://creativecommons.org/licenses/by-sa/4.0/\" rel=\"license\"><img style=\"border-width: 0;\" src=\"https://i.creativecommons.org/l/by-sa/4.0/80x15.png\" alt=\"Creative Commons License\" /></a><br />This work is licensed under a <a href=\"http://creativecommons.org/licenses/by-sa/4.0/\" rel=\"license\">Creative Commons Attribution-ShareAlike License</a>.<hr />Geologica Acta (ISSN-1695-6133)<br />Biblioteca de Geologia (UB-CSIC) | Facultat de Ci\u00e8ncies de la Terra, Mart\u00ed i Franqu\u00e8s s/n 08028 Barcelona | Spain<br />Phone: +34 93 403 19 89 | Fax: +34 93 402 14 21 | E-mail:\u00a0<a class=\"a\" href=\"mailto:geologica-acta@ictja.csic.es\">geologica-acta@ictja.csic.es</a>\n</div><!-- content -->\n</div><!-- main -->\n</div><!-- body -->\n\n\n\n</div> <!-- container -->\n\n\n<!-- 2013-01-17 miquel hern\u00e1ndez afegeix"], "copyright__copyright__copyright": ["eru\n\nFull Text:\n\nPDF\n\n\nDOI: http://dx.doi.org/10.1344/105.000000248\n\nRefbacks\n\n  \u2022 There are currently no refbacks.\n\n\n\n\nGeoscience e-Journals\n\n\u00a0\n\nPrevious\n\n\u00a0\n\nRandom\n\n\u00a0\n\nNext\n\n\u00a0\n\nList\n\n\u00a0\n\n\nThis work is licensed under a Creative Commons Attribution-ShareAlike License.\nGeologica Acta (ISSN-1695-6133)\nBiblioteca de Geologia (UB-CSIC) | Facultat de Ci\u00e8ncies de la Terra, Mart\u00ed i Franqu\u00e8s s/n 08028 Barcelona | Spain\nPhone: +34 93 403 19 89 | Fax: +34 93 402 14 21 | E-mail:\u00a0geologica-acta@ictja.csic.es"]}