Advances in the Lower Ordovician of the western Iberian Chain, NE Spain
The western Iberian Chain of NE Spain represents a lateral prolongation of the West Asturian-Leonese Zone. As other proximal sectors fringing NW Gondwana, the chain comprises a conÂformable and continuous FurongianâTremadocian transition, comprising a thick (3600â4500 m) Lower Ordovician sedimentar...
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| Format: | Article |
| Language: | English |
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Estonian Academy Publishers
2023-06-01
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| Series: | Estonian Journal of Earth Sciences |
| Subjects: | |
| Online Access: | https://kirj.ee/wp-content/plugins/kirj/pub/earth-1-2023-6-9_20230609122200.pdf |
| _version_ | 1797804402651693056 |
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| author | J. Javier Álvaro Blanca Martínez-Benítez |
| author_facet | J. Javier Álvaro Blanca Martínez-Benítez |
| author_sort | J. Javier Álvaro |
| collection | DOAJ |
| description | The western Iberian Chain of NE Spain represents a lateral prolongation of the West Asturian-Leonese Zone. As other proximal sectors fringing NW Gondwana, the chain comprises a conÂformable and continuous FurongianâTremadocian transition, comprising a thick (3600â4500 m) Lower Ordovician sedimentary succession, exclusively composed of siliciclastic strata and deposited in mid-latitude (temperate) waters. Although the shelly fossil record is not abundant, some key trilobites and brachiopods allow the identification of distinct biogeographic links with the Argentinian margin of West Gondwana, Oaxaca (Mexico), and the neighbouring Montagne Noire (France), with which a common biostratigraphic biozonation can be enviaged. Two phosphoritic interbeds rich in linguliformean brachiopods punctuate the Valconchán and Borrachón formations, and represent event beds related to condensation processes and sedimentation of explosive ignimbritic tuffs, respectively. |
| first_indexed | 2024-03-13T05:35:37Z |
| format | Article |
| id | doaj.art-8b609f22a82e4d1d9608a221d74c769e |
| institution | Directory Open Access Journal |
| issn | 1736-4728 1736-7557 |
| language | English |
| last_indexed | 2024-03-13T05:35:37Z |
| publishDate | 2023-06-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-8b609f22a82e4d1d9608a221d74c769e2023-06-14T07:33:30ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572023-06-0172169https://doi.org/10.3176/earth.2023.15https://doi.org/10.3176/earth.2023.15Advances in the Lower Ordovician of the western Iberian Chain, NE SpainJ. Javier Álvaro0Blanca Martínez-Benítez1Instituto de Geociencias (CSIC-UCM), Dr. Severo Ochoa 7, 28040 Madrid, SpainInstituto de Geociencias (CSIC-UCM), Dr. Severo Ochoa 7, 28040 Madrid, SpainThe western Iberian Chain of NE Spain represents a lateral prolongation of the West Asturian-Leonese Zone. As other proximal sectors fringing NW Gondwana, the chain comprises a conÂformable and continuous FurongianâTremadocian transition, comprising a thick (3600â4500 m) Lower Ordovician sedimentary succession, exclusively composed of siliciclastic strata and deposited in mid-latitude (temperate) waters. Although the shelly fossil record is not abundant, some key trilobites and brachiopods allow the identification of distinct biogeographic links with the Argentinian margin of West Gondwana, Oaxaca (Mexico), and the neighbouring Montagne Noire (France), with which a common biostratigraphic biozonation can be enviaged. Two phosphoritic interbeds rich in linguliformean brachiopods punctuate the Valconchán and Borrachón formations, and represent event beds related to condensation processes and sedimentation of explosive ignimbritic tuffs, respectively.https://kirj.ee/wp-content/plugins/kirj/pub/earth-1-2023-6-9_20230609122200.pdfbrachiopodstrilobitesechinodermsichnofossilsordoviciannw gondwana |
| spellingShingle | J. Javier Álvaro Blanca Martínez-Benítez Advances in the Lower Ordovician of the western Iberian Chain, NE Spain Estonian Journal of Earth Sciences brachiopods trilobites echinoderms ichnofossils ordovician nw gondwana |
| title | Advances in the Lower Ordovician of the western Iberian Chain, NE Spain |
| title_full | Advances in the Lower Ordovician of the western Iberian Chain, NE Spain |
| title_fullStr | Advances in the Lower Ordovician of the western Iberian Chain, NE Spain |
| title_full_unstemmed | Advances in the Lower Ordovician of the western Iberian Chain, NE Spain |
| title_short | Advances in the Lower Ordovician of the western Iberian Chain, NE Spain |
| title_sort | advances in the lower ordovician of the western iberian chain ne spain |
| topic | brachiopods trilobites echinoderms ichnofossils ordovician nw gondwana |
| url | https://kirj.ee/wp-content/plugins/kirj/pub/earth-1-2023-6-9_20230609122200.pdf |
| work_keys_str_mv | AT jjavieralvaro advancesinthelowerordovicianofthewesterniberianchainnespain AT blancamartinezbenitez advancesinthelowerordovicianofthewesterniberianchainnespain |