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El Jurásico de Mallorca (Islas Baleares)

Authors: Álvaro, M.; Barnolas, A.; Cabra, P.; Comas-Rengifo, M. J.; Fernández-López, S. R.; Goy Goy, A.;

El Jurásico de Mallorca (Islas Baleares)

Abstract

[ES] Se describen las unidades litoestratigráficas correspondientes a los materiales jurásicos de la Isla de Mallorca, así como las asociaciones fósiles (ammonites, braquiópodos y microfósiles) que han sido identificadas. Los materiales jurásicos más antiguos tienen características litoestratigráficas similares a las que han sido descritas para otros ámbitos paleogeográficos del Tethys. La primera unidad, denominada Fm. Mal Pas, comprende brechas dolomíticas («carniolas») en las que no se han reconocido fósiles que permitan datarla, por lo que su atribución al Hettangiense se fundamenta en la edad de los materiales infra y suprayacente. A la segunda unidad se le ha denominado Fui. Sóller. Está constituida en su base por materiales carbonáticos organizados en secuencias somenzantes (Mb. Es Barraca), atribuidos al Sinemuriense-Pliensbachiense por su contenido micropaleontológico. Localmente, a techo de estas facies se individualizan margas amarillentas (Mb. Sa Moleta) con fósiles característicos de las Zonas Jamesoni e Ibex del Carixiense. La parte superior de la formación corresponde a materiales siliciclásticos (Mb. Es Racó) que probablemente representan la parte superior del Carixiense.

[EN] The lithostratígraphic units and fossil assemblages (ammonites. brachiopods. microfossils) of the Jurassic in the Mallorca Island are described here. The oldest Jurassic sedimentary rocks (Mal Pas Fm.) are similar to the ones described in the Tethys realm. The unit consist of dolomitie breccias («Carniolas») and its stratigraphic position, overlying Norian sediments, suggest a possible Hettangian Age. Follows op the Sóller Fm. is subdivided in three members. The lower one, Es Barraca Mb.. is composed of shallowing upward carbonate sequences with a micropaleontological assemblage of Sinemurían- Pliensbachian Age. Ihe middle one. Sa Molleta Mb., that appears only in some arcas.. consist of yellow marís with a characteristic fossil assemblage of Jamesoni and Ibex Zones of the Carixian.The upperone. Es Racó Mb.. is composed of siliciclastic sediments probably Late Cartxian in age.

el Proyecto de Cartografía Geológica a escalas 1:50.000 (MAGNA) y 1:200.000 de la Isla de Mallorca. Este Proyecto, del Instituto Geológico y Minero de España, fue ejecutado por la C.G.S. con la colaboración, para el estudio paleontológico del Jurásico, del Departamento de Paleontología de la Universidad Complutense de Madrid. El estudio paleontológico también ha sido parcialmente financiado por el Proyecto 3394 de la CAYCIT y el 452 de la CAYCIT-CSIC.

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Keywords

Litostratigraphic units, Bioestratigrafía, España, Evolución sedimentaria, Jurásico, Jurassic, Isla de Mallorca, Paleobiogeography, Mallorca Island, Spain, Paleobiogeografía, Unidades Litoestratigráficas, Bioestratigraphy, Sedimentary evolution

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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