Journal of iberian geology: an international publication of earth sciences最新文献

{"title":"Evolución estratigráfica secuencial y tipos de plataformas de carbonatos del intervalo Oxfordiense-Berriasiense en las cordilleras ibérica oriental y costero catalana meridional","authors":"R. Salas","doi":"10.5209/REV_CGIB.1989.V13.41699","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1989.V13.41699","url":null,"abstract":"El Malm y la porcion basal del Cretacico inferior (Oxfordiense-Berriasiense) constituyen el tramo final del gran ciclo sedimentario jurasico (supersecuencia de deposito jurasica) de las cuencas del margen oriental de Iberia. Durante esta etapa la sedimentacion esta integrada por carbonatos de plataforma y en menor proporcion de cuenca. El registro sedimentario carbonatico de este intervalo se divide en tres secuencias de deposito, que presentan los siguientes tipos de plataformas: (1): Oxfordiense (hasta 40 m), rampa homoclinal, con bancos marginales oolitico-bioclasticos (bajios). wackesioner de esponjas y ammonites ymudsxontw de protoglobigerimas. (2): Kimmeridgiense (hasta 750 m). rampa distalmente acentuada, con mudsiones ritmicos tableados, bioconstrucciones de esponjas y margas anoxicas de cuenca. (3): Titonico-Berriasiense (hasta 1.000 m), plataforma somera, de poca pendiente deposicional muybien diferenciada, con extensas llanuras de marea. parcialmente dolomitizada, limitadas por bancos marginales oolitico-bioclasticos (bajios) que pasan a facies mas abiertas de calpionelidos. Dos factores principales controlan la evolucion de la sedimentacion de carbonatos (1): la historia de la tectonica extensiva local y de la subsidencia tectonica y (2): las vartactones eustaticas del nivel del mar. La capacidad de produccion de sedimento carbonatico por los organismos, si bien es importante, estaria subordinada a los mencionados factores. Las entradas de terrigenos siliciclasticos serian un factor de segundo orden.","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116595015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Análisis secuencial y sedimentología del Lías en los Pirineos centrales","authors":"X. Ramón","doi":"10.5209/REV_CGIB.1989.V13.41700","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1989.V13.41700","url":null,"abstract":"El Megaciclo del Lias, en los Pirineos centrales, esta limitado en la base por un nivel de brechas ferruginosas (Brecha de Dubar) o su equivalente lateral de edad Hettangiense, y a techo por una superficie de erosion ferruginizada intra-Aaleniense. Dentro de este Megaciclo se han reconocido seis Secuencias Deposicionales (See. 1 a VI) que coinciden a grandes rasgos con las principales unidades. Las dos primeras secuencias 1 y II. estan formadas por carbonatos en facies de plataforma interna (evaporitas. colapsobrechas. dolomias y ciclos oolitos-estromatolitos somerizantes). Las cuatro restantes secuencias III a VI, son de tipo somerizante y estratocreciente, y se caracterizan por carbonatos en facies de plataforma externa (margas, calizas nodulares, lumaquelas y calizas oncoliticas). Las seis secuencias estan formadas por depositos en facies de Alto Nivel (high stand). Los limites secuenciales corresponden a una amalgamacion del maximo regresivo con el maximo transgresivo representado por un hard-ground. El analisis secuencial, no obstante, es dificil por la complejidad tectonica que dificulta la correlacion lateral directa entre facies de plataforma y cuenca, y por la escasez de fosiles. La sedimentacion del Lias, en los Pirineos centrales, tuvo lugar en un ambiente de plataforma carbonatada. Las dos Secuencias Deposicionales inferiores (See. 1 y II) estan constituidas por depositos de plataforma interna y las cuatro restantes (III a VI) estan constituidas por depositos de plataforma externa. El cambio en el ambiente deposicional esta relacionado con la fase de 4fiing durante la formacion del Margen Continental pasivo del Tethys. Cada Secuencia Deposicional esta considerada como un deposito de Alto Nivel (Augh stand) y no sc observan depositos de Bajo Nivel (kw stand). Los limites secuenciales inferior y superior del Megaciclo del Lias podrian corresponder a las discontinuidades de Haq e/al. (1987), 210 m.a. y 117 m.a. respectivamente. Haq et aL (1987) diferencia en el Megaciclo del Lias once ciclos (o Secuencias Deposicionalesjl. lo que contrasta con los seis ciclos diferenciados en los Pirineos centrales. La falta de coincidencia en el numero de ciclos puede explicarse por el hecho de que los materiales estudiados pertenecen a un dominio paleogeografico de plataforma y no todas las secuencias de Haq el al. (1987) llegaron a depositarse, estando representadas por hiatos.","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125481693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Los materiales anteordovícicos del Anticlinal de Navalpino (provincias de Badajoz y Ciudad Real, España central)","authors":"M. D. S. José","doi":"10.5209/REV_CGIB.1984.V9.2736","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1984.V9.2736","url":null,"abstract":"Trabajo financiado por la Fundacion Juan March y por la CAICYT, a traves del IGE del \u0000CSIC.","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115365725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"El Jurásico Medio y Superior (Calloviense-Kimmeridgiense) en el sector de la llanura de Arcos (Ariño-Oliete,Teruel): análisis tafonómico y bioestratigrafía.","authors":"G. Meléndez, J. Bello, Graciela Delvene, I. Pérez-urresti","doi":"10.5209/REV_CGIB.1997.V23.2495","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1997.V23.2495","url":null,"abstract":"La sedimentacion durante el intervalo Calloviense-Oxfordiense dentro de la denominada «Llanura de Arcos», en la parte oriental de la Plataforma Aragonesa, tiene lugar en un area de alto paleogeografico, somera a temporalmente emergida. Durante el Calloviense Inferior (Biozona Herveyi) la sedimentacion se caracteriza por el predominio de calizas (wackestone a packstone) bioclasticas con filamentos. Entre las Biozonas Gracilis y Plicatilis (Calloviense Inferior-Oxfordiense Medio), la sedimentacion esta dominada por calizas fosiliferas wackestone con oolitos ferruginosos y bioclastos que forman sucesivos episodios irregulares y discontinuos. El analisis tafonomico y bioestratigrafico revela la existencia de numerosas discontinuidades y lagunas estratigraficas en este intervalo, resultando en una sucesion condensada que presenta asimismo unos altos valores de condensacion tafonomica. Tras un episodio (Bz. Transversarium) caracterizado por la sedimentacion de calizas con espongiarios y crinoides, la sedimentacion durante las Biozonas Bifurcatus y Bimam Cuadernos ?le Geologia Iberica, n.0 23, 269-300. Servicio de Publicaciones Universidad Complutense. Madrid, i997. 270 G. Melendez et al. matum se hace marcadamente glauconitica, reflejando tambien un cierto grado de condensacion estratigrafica con respecto a las areas mas noroccidentales de la plataforma, donde este intervalo presenta un caracter mas terrigeno, caracterizado por secuencias expandidas. En el corte clasico de las Ventas de San Pedro, entre Arino y Oliete, la parte inferior de la Subbiozona Planula (Biohorizonte Proteron) se ha caracterizado con ammonites en la parte superior de esta unidad carbonatada. Por encima, la Subbiozona Galar y el Kimmeridgiense Inferior se encuentran probablemente representados en las unidades suprayacentes, las Formaciones Sot de Chera y Loriguilla, que en este sector de la plataforma presentan un escaso contenido en ammonites.","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115615023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Oligocene - Early Miocene syntectonic fluvial sedimentation in the Aragonese Pyrenean domain of the Ebro Basin: facies models and structural controls.","authors":"G. P. Tirapu, C. Arenas","doi":"10.5209/REV_CGIB.1996.V21.2532","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1996.V21.2532","url":null,"abstract":"This contribution deals with a part of the northern margin of the Ebro Basin (Fig. 1). The Upper Oligocene-Lower Miocene molassic infilling in that part mainly corresponds to an extensive fluvial system: the Luna system, which drained the Gavamie unit area and emerged in the basin to the west of the Sierras Exteriores Aragonesas. Small, margina] alluvial fans originated along the Sierras combined in the Luna fluvial system, as well as in the eastern Huesca fluvial system, outside the study area. TIn-ce tectosedimentary units (T.S.U.> were differentiated in the Uncastilio Formation (Figs. 2, 3 and 4), the evolution of whichwas controlled by teetonies affecting the drainage basins. The study of the different lithofacies, their lateral relationsbips and their areal distribution through time (Fig. 5) led to establish sedimentary models for the marginal fans and Luna fluvial system (Hg. 6>. The Luna system resulted from coalescence of two fluvial fans (Figs. 6 and 7). Despite the fluvial network appears mainily as radial, it was controlled by the syndepositional development of the Fuencalderas and Uncastillo anticlines, within the Ebro Basin. Syndepositional folding is shown by important thickness variations in T.S.U., as wel] as by tibe formation of wedge systems within the basin. Progressive uplift of these structures channeled part of the diseharge parallel to tibe basin margin (Figs. 6 and 7), while another portion flowed basinward from the periclinal ends. Vertical aceretion in the synclinal areas north of the anticlines compensated tibe anticlinal uplift, making the siope more genfle and originating bench terraces within tibe general fan slope. In these arcas of gentle slope meandering sandy rivers developed in proximal scctors of tibe systcm, 5.5 lun fair from the margin at present. i","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121813020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlaciones bioestratigráficas en el Toarciense de la Península Ibérica","authors":"P. Rivas, Rogério Rocha, Serge Elmi, A. Goy, M. R. Mouterde","doi":"10.5209/REV_CGIB.1989.V13.2657","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1989.V13.2657","url":null,"abstract":"","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":" May","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120827536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chame Ibérique et Prébétique. Quatriéme jour.","authors":"A. Foucault, C. Arias, J. Azéma, L. Vilas, G. Leret","doi":"10.5209/REV_CGIB.1979.V5.2862","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1979.V5.2862","url":null,"abstract":"","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"255 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120974144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The extinction of conodonts--in terms of discrete elements--at the Triassic-Jurassic boundary","authors":"M. Renzi, K. Budorov, M. Sudar","doi":"10.5209/REV_CGIB.1996.V20.2555","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1996.V20.2555","url":null,"abstract":"The extinction of conodonts at the end of Triassic times is studied. The possibility of random extinetion is considered. Extinction and origination rate averages for lineages of the Phanerozoic marine invertebrates are not coherent with the dynamics of this group. Their extinction rate diminished since the Lower Triassic to the Upper Triassic, but the lineage origination rate diminished since the Ladinian as well, and the clade had negative growth rate, and the probability of extinction was high. Diffuse competition with better animal designs belonging to Paleozoic and Modern evolutionary faunas and, in a more secondary way, a decrease of available marine areas and spreading of environments with abnormal Salinity in the Western Tethys are pointed out as possible causes of their extinction.","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127286935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aspectos sedimentológicos y estratigráficos de las facies Buntsandstein y Muschelkalk entre Cueva del Hierro y Chelva (provincias de Cuenca y Valencia). Serranía de Cuenca. España","authors":"J. López-Gómez","doi":"10.5209/REV_CGIB.1987.V11.2710","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1987.V11.2710","url":null,"abstract":"Se estudian los materiales pertenecientes a las facies Buntsandstein y Muschelkalk dentro del area que abarca el 5 de la Rama Castellana de la Cordillera Iberica, entre Cueva del Hierro y Chelva (provincias de Cuenca y Valencia) (fig. 1). Se han obtenido las «series tipo» de las citadas facies a partir de siete unidades litoestratigraficas con caracter informal para cada una de ellas (fig. 2). Igualmente, se han obtenido subunidades y asociaciones de facies dentro de las unidades. A partir de la descripcion de las citadas unidades se ha obtenido la interpretacion sedimentologica de las facies que se estudian. Asi, las facies Buntsandstein son interpretadas, de muro a techo, como sedimentos proximales de abanicos aluviales que evolucionan hacia facies mas distales de estos y, depositos de rios de baja sinuosidad (fig. 3). Por otro lado, las facies Muschelkalk son interpretadas como facies pertenecientes a diferentes puntos dentro de una llanura carbonatada de marea para dos de las unidades y, de plataforma marina somera con aportes siliciclasticos y precipitacion de sales para la tercera intercalada entre aquellas (fig. 4). Se considera que estos materiales corresponderian al relleno de una cuenca que evolucionaria como un graben en sus etapas iniciales (facies Buntsandstein), como una etapa posterior de madurez del cita do graben y otra de subsidencia termica (facies Muschelkalk) (fig. 5). Departamento de Estratigrafia, Facultad de Ciencias Geologicas, Universi * dad Complutense, Madrid 28040. 647","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123545050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Consideraciones generales sobre el Triásico y el Pérmico de la Cordillera Ibérica y bordes del Sistema Central.","authors":"C. Virgili","doi":"10.5209/REV_CGIB.1977.V4.2919","DOIUrl":"https://doi.org/10.5209/REV_CGIB.1977.V4.2919","url":null,"abstract":"","PeriodicalId":110220,"journal":{"name":"Journal of iberian geology: an international publication of earth sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116230353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}