Publication: El Jurásico Inferior en la sección de Almonacid
de la Cuba (sector central de la Cordillera
Ibérica, Zaragoza, España)
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Publication Date
1999
Authors
Comas-Rengifo, María José
Goy, Antonio
Herrero Matesanz, Concepción
Perilli, Nicola
Rodrigo, A.
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Universidad Complutense de Madrid. Departamento de Estratigrafía
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Abstract
En este trabajo se detallan las características locales de las unidades litoestigráficas del Jurásico Inferior de la Cuenca Ibérica en las proximidades de Almonacid de la Cuba y de Belchite (Zaragoza), así como, las de la «Unidad de Almonacid de la Cuba», situada entre las Formaciones Cuevas Labradas y Cerro del Pez y que sólo está definida en este sector. También, se detallan cuestiones relativas a la organización secuencial de los materiales que las constituyen. Por otra parte, se realizan estudios bioestratigráficos con ammonoideos, braquiópodos, foraminíferos y nannoplancton calcáreo; habiéndose podido caracterizar las Zonas Jamesoni, Ibex y Davoei del Pliensbachiense inferior (Carixiense), las Zonas Stokesi, Margaritatus y Spinatum del Pliensbachiense superior (Domeríense) y las Zonas Tenuicostatum y Serpentinus del Toarciense inferior.
The Almonacid de la Cuba-Belchite area (Zaragoza) in the Aragonese (NE) branch of the Iberian Chain, eastern Spain, is known to include some of the most outstanding Lower Jurassic outcrops, both by the good exposure and the completeness of the stratigraphic successions. The particular features of the lithostratigraphic units formally defined fon te Iberian Basin are analysed and described, including the informal unit known as «Almonacid de la Cuba Unit» lower Pliensbachian in age, between the Cuevas Labradas and te Cerro del Pez Formations), which is only present in te northeastern part of the Aragonese Branch of the Iberian Chain. The study also involves the sequence stratigraphy analysis of the units. The biostratigraphic study means of ammonoids, brachiopods, forams and calcareous nannoplakton has led to the characterisation of the Jamesoni, Ibex and Davoei Zones of the lower Pliensbachian (Carixian), the Stokesi, Margaritatus and Spinatum Zones of the upper Pliensbachian (Domerian) and the Tenuicostatum and Serpentinus Zones of the lower Toarcian.
The Almonacid de la Cuba-Belchite area (Zaragoza) in the Aragonese (NE) branch of the Iberian Chain, eastern Spain, is known to include some of the most outstanding Lower Jurassic outcrops, both by the good exposure and the completeness of the stratigraphic successions. The particular features of the lithostratigraphic units formally defined fon te Iberian Basin are analysed and described, including the informal unit known as «Almonacid de la Cuba Unit» lower Pliensbachian in age, between the Cuevas Labradas and te Cerro del Pez Formations), which is only present in te northeastern part of the Aragonese Branch of the Iberian Chain. The study also involves the sequence stratigraphy analysis of the units. The biostratigraphic study means of ammonoids, brachiopods, forams and calcareous nannoplakton has led to the characterisation of the Jamesoni, Ibex and Davoei Zones of the lower Pliensbachian (Carixian), the Stokesi, Margaritatus and Spinatum Zones of the upper Pliensbachian (Domerian) and the Tenuicostatum and Serpentinus Zones of the lower Toarcian.