New evidence of nearshore Mid-Triassic Zoophycos: morphological and paleoenvironmental characterization

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Título: New evidence of nearshore Mid-Triassic Zoophycos: morphological and paleoenvironmental characterization
Autor/es: Giannetti, Alice | Tent-Manclus, Jose Enrique | Baeza Carratalá, José Francisco
Grupo/s de investigación o GITE: Cambios Paleoambientales | Evolución Geodinámica de la Cordillera Bética Oriental y de la Plataforma Marina de Alicante
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente
Palabras clave: Middle Triassic | Zoophycos | Shallow-water environment | Iberian Range | Spain
Área/s de conocimiento: Paleontología | Geodinámica Interna
Fecha de publicación: jul-2017
Editor: Springer Berlin Heidelberg
Cita bibliográfica: Facies. 2017, 63:16. doi:10.1007/s10347-017-0498-8
Resumen: Zoophycos is a well-known trace fossil common throughout the Phanerozoic. Paleozoic forms show important differences in morphology and habitat distribution with respect to the Jurassic, Cretaceous, and Cenozoic ones. Therefore, Early–Middle Triassic is considered a crucial time-span for the understanding of the evolution of this trace fossil. So far, Early Triassic Zoophycos is unknown and Middle Triassic forms were recorded only in deposits from Thuringia. The morphology and paleoenvironment of Zoophycos from the middle–upper Muschelkalk of the Iberian Range is herein described. The best-preserved trace fossils occur in a dolomicritic bed Ladinian in age, and are represented by small forms with a subcircular, slightly lobed outline and very little penetration depth. They were deposited in a very shallow, quiet-water environment with transition to supratidal/emerged areas. The low diversity of both trace fossils and skeletal remains point to stressful conditions related to strong salinity variations and/or poor water circulation. A comparison was made with Zoophycos from Anisian deposits of the Muschelkalk in Germany. This showed that both forms are quite simple and penetrate only the shallowest tiers, although they are different in whorl outline and lobe shape. This confirms that, notwithstanding the morphological variability of this group, Zoophycos still maintained a quite simple structure in the Triassic. A shallow-water environment was deduced for both localities, confirming that at least until the Early Jurassic Zoophycos had not definitively migrated toward deep-water areas.
Patrocinador/es: This research was supported by the projects CGL2015-66835-P and CGL2015-66604-R, financed by the Spanish Ministry of Education and Science (MINECO, government of Spain).
ISSN: 0172-9179 (Print) | 1612-4820 (Online)
DOI: 10.1007/s10347-017-0498-8
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © Springer-Verlag Berlin Heidelberg 2017. The final publication is available at Springer via
Revisión científica: si
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Aparece en las colecciones:INV - GEODIN - Artículos de Revistas
INV - CP - Artículos de Revistas

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