Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system.
Lower Priabonian coral bioherms and biostromes, encased in prodelta marls/clays, occur in the Aınsa-Jaca piggyback basin, in the South Central Pyrenean zone. Detailed mapping of lithofacies and bounding surfaces onto photomosaics reveals the architecture of coral buildups. Coral lithosomes occur eit...
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Online Access: | http://hdl.handle.net/11380/712823 https://doi.org/10.1111/j.1365-3091.2011.01275.x |
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ftunivmodena:oai:iris.unimore.it:11380/712823 2024-04-21T08:10:36+00:00 Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. M. Morsilli L. Pomar P. Hallock M. Aurell BOSELLINI, Francesca PAPAZZONI, Cesare Andrea M., Morsilli Bosellini, Francesca L., Pomar P., Hallock M., Aurell Papazzoni, Cesare Andrea 2012 STAMPA http://hdl.handle.net/11380/712823 https://doi.org/10.1111/j.1365-3091.2011.01275.x eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000301718300002 volume:59 firstpage:766 lastpage:794 journal:SEDIMENTOLOGY http://hdl.handle.net/11380/712823 doi:10.1111/j.1365-3091.2011.01275.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84858702003 info:eu-repo/semantics/closedAccess Coral buildup delta Eocene mesophotic coral mixed systems info:eu-repo/semantics/article 2012 ftunivmodena https://doi.org/10.1111/j.1365-3091.2011.01275.x 2024-03-28T01:19:10Z Lower Priabonian coral bioherms and biostromes, encased in prodelta marls/clays, occur in the Aınsa-Jaca piggyback basin, in the South Central Pyrenean zone. Detailed mapping of lithofacies and bounding surfaces onto photomosaics reveals the architecture of coral buildups. Coral lithosomes occur either isolated or amalgamated in larger buildups. Isolated lithosomesare 1 to 8 m thick and a few hundred metres wide; clay content within coral colonies is significant. Stacked bioherms form low-relief buildups, commonly 20 to 30 m thick, locally up to 50 m. These bioherms are progressively younger to the west, following progradation of the deltaic complex. The lowermostskeletal-rich beds consist of bryozoan floatstone with wackestone to packstone matrix, in which planktonic foraminifera are abundant and light-related organisms absent. Basal coral biostromes, and the base of many bioherms, consist of platy-coral colonies ‘floating’ in a fine-grained matrix rich inbranches of red algae. Corals with domal or massive shape, locally mixed with branching corals and phaceloid coral colonies, dominate buildup cores. These corals are surrounded by matrix and lack organic framework. The matrix consists of wackestone to packstone, locally floatstone, with conspicuous red algal and coral fragments, along with bryozoans, planktonic and benthonicforaminifera and locally sponges. Coral rudstone and skeletal packstone, with wackestone to packstone matrix, also occur as wedges abutting the buildup margins. Integrative analysis of rock textures, skeletal components, buildup anatomy and facies architecture clearly reveal that these coral buildups developed in a prodelta setting where shifting of delta lobes or rainfall cyclesepisodically resulted in water transparency that allowed zooxanthellate coral growth. The bathymetric position of the buildups has been constrained from the light-dependent communities and lithofacies distribution within thebuildups. The process-product analysis used here reinforces the hypothesis that ... Article in Journal/Newspaper Planktonic foraminifera Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) Sedimentology 59 3 766 794 |
institution |
Open Polar |
collection |
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
op_collection_id |
ftunivmodena |
language |
English |
topic |
Coral buildup delta Eocene mesophotic coral mixed systems |
spellingShingle |
Coral buildup delta Eocene mesophotic coral mixed systems M. Morsilli L. Pomar P. Hallock M. Aurell BOSELLINI, Francesca PAPAZZONI, Cesare Andrea Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. |
topic_facet |
Coral buildup delta Eocene mesophotic coral mixed systems |
description |
Lower Priabonian coral bioherms and biostromes, encased in prodelta marls/clays, occur in the Aınsa-Jaca piggyback basin, in the South Central Pyrenean zone. Detailed mapping of lithofacies and bounding surfaces onto photomosaics reveals the architecture of coral buildups. Coral lithosomes occur either isolated or amalgamated in larger buildups. Isolated lithosomesare 1 to 8 m thick and a few hundred metres wide; clay content within coral colonies is significant. Stacked bioherms form low-relief buildups, commonly 20 to 30 m thick, locally up to 50 m. These bioherms are progressively younger to the west, following progradation of the deltaic complex. The lowermostskeletal-rich beds consist of bryozoan floatstone with wackestone to packstone matrix, in which planktonic foraminifera are abundant and light-related organisms absent. Basal coral biostromes, and the base of many bioherms, consist of platy-coral colonies ‘floating’ in a fine-grained matrix rich inbranches of red algae. Corals with domal or massive shape, locally mixed with branching corals and phaceloid coral colonies, dominate buildup cores. These corals are surrounded by matrix and lack organic framework. The matrix consists of wackestone to packstone, locally floatstone, with conspicuous red algal and coral fragments, along with bryozoans, planktonic and benthonicforaminifera and locally sponges. Coral rudstone and skeletal packstone, with wackestone to packstone matrix, also occur as wedges abutting the buildup margins. Integrative analysis of rock textures, skeletal components, buildup anatomy and facies architecture clearly reveal that these coral buildups developed in a prodelta setting where shifting of delta lobes or rainfall cyclesepisodically resulted in water transparency that allowed zooxanthellate coral growth. The bathymetric position of the buildups has been constrained from the light-dependent communities and lithofacies distribution within thebuildups. The process-product analysis used here reinforces the hypothesis that ... |
author2 |
M., Morsilli Bosellini, Francesca L., Pomar P., Hallock M., Aurell Papazzoni, Cesare Andrea |
format |
Article in Journal/Newspaper |
author |
M. Morsilli L. Pomar P. Hallock M. Aurell BOSELLINI, Francesca PAPAZZONI, Cesare Andrea |
author_facet |
M. Morsilli L. Pomar P. Hallock M. Aurell BOSELLINI, Francesca PAPAZZONI, Cesare Andrea |
author_sort |
M. Morsilli |
title |
Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. |
title_short |
Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. |
title_full |
Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. |
title_fullStr |
Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. |
title_full_unstemmed |
Mesophotic coral buildups in a prodelta setting (late Eocene, southern Pyrenees, Spain): a mixed carbonate-siliciclastic system. |
title_sort |
mesophotic coral buildups in a prodelta setting (late eocene, southern pyrenees, spain): a mixed carbonate-siliciclastic system. |
publishDate |
2012 |
url |
http://hdl.handle.net/11380/712823 https://doi.org/10.1111/j.1365-3091.2011.01275.x |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000301718300002 volume:59 firstpage:766 lastpage:794 journal:SEDIMENTOLOGY http://hdl.handle.net/11380/712823 doi:10.1111/j.1365-3091.2011.01275.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84858702003 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/j.1365-3091.2011.01275.x |
container_title |
Sedimentology |
container_volume |
59 |
container_issue |
3 |
container_start_page |
766 |
op_container_end_page |
794 |
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