Spectral analysis of Toarcian sediments from the Valdorbia Section (Umbria-Marche-Apennines): the astronomical input in the foraminiferal record

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dc.contributor.author Rodríguez Tovar, Francisco J.
dc.contributor.author Pardo Iguzquiza, Eulogio
dc.contributor.author Reolid, Matías
dc.contributor.author Bartolini, Annachiara
dc.date.accessioned 2020-09-28T08:52:22Z
dc.date.available 2020-09-28T08:52:22Z
dc.date.issued 2016
dc.identifier.citation Rivista Italiana di Paleontologia e Stratigrafia, 2016, v. 122, n.2, 45-60 es_ES
dc.identifier.issn 2039-4942
dc.identifier.uri http://hdl.handle.net/20.500.12468/411
dc.description.abstract Toarcian sections studied mainly in Europe have revealed the incidence of Milankovitch forcing with a well-developed, highly stable, 405 ky component of eccentricity, a short-term eccentricity of ~100 kyr, the cycle of obliquity ~36 kyr, and the precession signal at ~21 kyr. Cyclostratigraphic analysis of the Toarcian succession at the Valdorbia section (Umbria-Marche Apennines) was conducted based on time-series of foraminiferal assemblages. Well-developed cyclic patterns were obtained, with several significant cycles corresponding to thicknesses of 3.8-4.1 m / 5.8-6.3 m / 8.2 m / 10.4 m. Comparison with previous studies at the Valdorbia section led us to interpret the cycle of ~4 m as directly related with the short-term eccentricity (95-105 kyr). The rest of the cycles could be assigned to a periodicity of ~140-160 kyr, ~200 kyr and ~250 kyr, and interpreted as indirect signals of the long-term eccentricity, obliquity and precession, whose record would be impeded by the incompleteness of the studied succession and the sampling interval. Studied components in the foraminiferal assemblage show variable cyclostratigraphic patterns, allowing for a differentiation of groups based on similar registered cycles. These groups reveal different responses by the foraminiferal assemblage, associated with particular requirements, to the palaeoenvironmental changes of Milankovitch origin. es_ES
dc.description.sponsorship Departamento de Estratigrafía y Paleontología, Universidad de Granada, España es_ES
dc.description.sponsorship Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Departamento de Geología, Universidad de Jaén, España es_ES
dc.description.sponsorship Centre de Recherche sur la Paléodiversité et les Paléoenvironnements, Muséum National d’Histoire Naturelle, Francia es_ES
dc.description.sponsorship Centre de Recherche sur la Paléodiversité et les Paléoenvironnements, Université Pierre et marie Curie, Francia es_ES
dc.description.sponsorship Centre de Recherche sur la Paléodiversité et les Paléoenvironnements, Centre National de la Recherche Scientifique, Francia es_ES
dc.language.iso en es_ES
dc.publisher Università degli Studi di Milano es_ES
dc.relation RYC-2009-04316 es_ES
dc.relation CGL2012- 33281 es_ES
dc.relation CGL2015-66835-P es_ES
dc.relation RNM-3715 es_ES
dc.relation P11-RNM-7408 es_ES
dc.relation RNM-178, RNM-200 es_ES
dc.rights Acceso abierto es_ES
dc.subject Cyclostratigraphy es_ES
dc.subject Milankovitch cycles es_ES
dc.subject foraminiferal assemblage es_ES
dc.subject Toarcian es_ES
dc.subject Valdorbia section es_ES
dc.subject Central Italy es_ES
dc.title Spectral analysis of Toarcian sediments from the Valdorbia Section (Umbria-Marche-Apennines): the astronomical input in the foraminiferal record es_ES
dc.type Postprint es_ES
dc.relation.publisherversion https://riviste.unimi.it/index.php/RIPS/article/view/7237/7101 es_ES
dc.description.funder Secretaría de Estado de I+D+I, España es_ES
dc.description.funder Junta de Andalucía, España es_ES
dc.coverage.spatialStudy Umbría, Las Marcas, Apeninos, Italia


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