English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Pro

Presents the zaia usage as premium feature

ZAIA

Presents AI Discovery search usage as a premium feature

AI Discovery

Presents AI Discovery explain and summary usage as a premium feature

Content Analysis

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Presents the pdf analysis as premium feature

PDF Analysis

1500 Top-up

3000 Top-up

Zendy Basic

2500 Top-up

Zendy Unlimited

Presents the access of premium content as premium feature

Premium Content

The aim of this paper is to summarize the present knowledge reached by the authors on the carbonate ramp which developed in the iberian basin during Kimmeridgian times. Our results were obtained from a combined field analysis and computer modelling carried out in the north Iberian Chain (NE Spain). Extensive field analysis in the Ricia area (Zaragoza, NE Spain), resulted in a detailed mapping of the transition from inner to outerramp facies on this carbonate rampo Three facies belts may be distinguished in this rampo The outer ramp facies consists of marls and mudstones rhythmic facies. The inner ramp facies, located aboye fair-weather wave base, are dominated by coral patch reef growing. The middle ramp facies are represented by marls and micrites bearing skeletal and oolitic tempestite levels which sharply grade into high-amplitude o'olitic sandwave. Factors such as resedimentation by storms, carbonate production and relative variation of sea level acting in the Kimmeridgian ramp are also quantiphied and discussed. Most of the mud accumulated in outer-ramp areas was produced in the coral &#194;&#171;carbonate factory&#194;&#187; located in inner areas. Off-shore resedimentation by storm was the main agent of basinward transport of this mudo The deduced accommodation curve consists of three elements: a linear rise which satisfactorily matches the normal subsidence figures observed in intracratonic basins; a third-order cycle, that may have a regional cause and higher order cycles in the Milanckovich band, that may be eustatic in origin.  La sedimentaci&#243;n en la cuenca ib&#233;rica septentrional durante el Kimmeridgiense tuvo lugar en una extensa rampa carbonatada de bajo &#225;ngulo. Las facies de rampa externa, acumuladas por debajo del nivel de base del oleaje debido a tormentas (i.e., C. 50 to 80 m de profundidad), est&#225;n formadas por una ritmita de margas y calizas (i.e., Fm Loriguilla). Las facies de rampa interna, localizadas por encima del nivel de base del oleaje de buen tiempo (i.e., hasta 10 m de profundidad), est&#225;n dominadas por bioconstrucciones de corales (i.e .. Fm Torrecilla). Las facies de rampa media est&#225;n representadas por margas y micritas con niveles de tempestitas biocl&#225;sticas y ool&#237;ticas que pasan lateral y verticalmente a sandwaves ool&#237;ticos de gran amplitud (i.e., Mb. Ricia). La modelizaci&#243;n por ordenador ha permitido cuantificar algunos aspectos de esta rampa. As&#237;, la distancia de resedimentaci&#243;n mar adentro del sedimento de grano fino producido en las zonas internas de la rampa, por el efecto de tormentas, puede ser de hasta 40 Km. La producci&#243;n de carbonato oscilar&#237;a entre 8 y 2 cm/l.000 a&#241;os. en funci&#243;n de la profundidad. Por otra parte, la curva de la variaci&#243;n de la acomodaci&#243;n deducida para el Kimmeridgiense est&#225; compuesta por tres elementos: un ascenso lineal de 4 cm/l.000 a&#241;os. un ciclo de tercer orden de baja amplitud y ciclos de mayor orden. de 20.000 y 100.000 a&#241;os respectivamente. Tanto el ascenso lineal como el ciclo de tercer orden se han relacionado con causas regionales, mientras que los ciclos de mayor orden se encuentran en la banda de Milanckovich y pueden ser por tanto de origen eust&#225;tico

Factors controlling the sedimentary evolution of the Kimmeridgian ramp in the north Iberian Basin (NE Spain)