Oxfordian Upper Jurassic coral reefs in Western Europe : reef types and conceptual depositional model
| Titre | Oxfordian Upper Jurassic coral reefs in Western Europe : reef types and conceptual depositional model |
|---|---|
| Type de document | article |
| Auteur(s) | Insalaco, E. Hallam, A. Rosen, B. |
| Date | 1997 |
| Titre de la publication | Sedimentology |
| Volume | vol. 44 |
| N° | 4 |
| N° de page(s) | 707–734 |
| Résumé | Comparative sedimentology and palaeoecology of Oxfordian Upper Jurassic coral-dominated reefs of England, France, Italy and Switzerland has been used to: 1 identify and characterize different types of Late Jurassic coral reefs with regard to their litho- and biofacies| and 2 develop a depositional model for these reefs relating different reef types to each other within a palaeoenvironmental framework. Eight generic reef types and one associated reef facies are recognized. These are: I biostromal units dominated by platy microsolenids developed within clean limestone facies| II biostromal units dominated by platy microso!enids developed within marly fades| III reefal thickets dominated by tall dense phaceloid colonies developed within pure carbonate muds| IV<i> </i>microbial-coral reefs dominated by massive, branching ramose and phaceloid colonies| V large high diversity reefal units associated with large volumes of bioclastic material| VI small species-poor reefs developed within mixed carbonate/siliciclastic facies| VII microbial-coral reefs dominated by massive colonies| VIII reefal thickets dominated by branching ramose colonies with widely spaced branches developed amongst sand shoals and coral debris channels| and IX conglomerates rich in rounded coral fragments the reef associated facies. The development of these different constructional and compositional reef types is interpreted as being primarily a function of light intensity, hydrodynamic energy levels and sediment balance. A conceptual depositional model based on these parameters can be used to predict the spatial and temporal distribution of different reefal carbonates and highlight sedimentological and palaeoecological trends in reef development. |
| Site | http://onlinelibrary.wiley.com/doi/10.1046/j.1365-3091.1997.d01-44.x/abstract |
| DOI | 10.1046/j.1365-3091.1997.d01-44.x |
| Langue | Anglais |
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