High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal
Rhythmites in pelagic sediments can include information on paleoclimate and with orbital cycles. This paper documents and interprets an unusual rhythmic succession from a cool-water shallow-marine shelf that includes features of Mediterranean-type ramps and open-ocean-type ramps. In the subsiding so...
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Online Access: | http://hdl.handle.net/10045/33735 https://doi.org/10.2110/jsr.2009.028 |
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ftunivalicante:oai:rua.ua.es:10045/33735 2023-05-15T18:00:50+02:00 High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal García García, Fernando Soria Mingorance, Jesús Miguel Viseras Alarcón, César Fernández Martínez, Juan Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente Cambios Paleoambientales 2009 http://hdl.handle.net/10045/33735 https://doi.org/10.2110/jsr.2009.028 eng eng Society for Sedimentary Geology (SEPM) http://dx.doi.org/10.2110/jsr.2009.028 Journal of Sedimentary Research. 2009, 79(5): 302-315. doi:10.2110/jsr.2009.028 1527-1404 (Print) 1938-3681 (Online) http://hdl.handle.net/10045/33735 doi:10.2110/jsr.2009.028 Copyright © 2009, SEPM (Society for Sedimentary Geology) info:eu-repo/semantics/openAccess Mixed siliciclastic-carbonate shelf Late Miocene Guadix Basin Estratigrafía info:eu-repo/semantics/article 2009 ftunivalicante https://doi.org/10.2110/jsr.2009.028 2020-06-05T13:08:02Z Rhythmites in pelagic sediments can include information on paleoclimate and with orbital cycles. This paper documents and interprets an unusual rhythmic succession from a cool-water shallow-marine shelf that includes features of Mediterranean-type ramps and open-ocean-type ramps. In the subsiding southwestern margin of the Guadix Basin (southern Spain, Betic Cordillera), during the late Tortonian, a 640-m-thick succession was deposited over a short period (7.8–7.2 Ma). This succession contains 30 sedimentary packages or rhythmites, each defined by two facies associations: a mixed cross-stratified siliciclastic–skeletal sandstone and a homogeneous marl rich in planktonic foraminifera. Sandstones ranging in thickness from 3 m to 20 m contain coralline algae, bivalves, bryozoans, benthic foraminifera, echinoids, and brachiopods (typical temperate-water shelf biofacies). These units exhibit cross-strata sets up to four meters high, interpreted to have been produced by strong unidirectional currents. The marly deposits range in thickness from 2 to 17 m and contain an association of cold-water planktonic foraminifera as well as thin sandstone layers that exhibit normal grading corresponding to typical incomplete Bouma sequences or a lower division with planar lamination and an upper division of very fine- to fine-grained sandstone with hummocky and swaly cross-stratification. On the basis of the sedimentary structures, the sandstone layers are interpreted as sporadic turbidity flows and storm ebb–surge deposits. On the basis of the sedimentary structures, the hydrodynamic conditions during deposition of the mixed siliciclastic–carbonate interval were high-energy. Based on sedimentary and biogenic features of the rhythmites and their temporal durations (ca. 20 ka), rhythmicity is interpreted to reflect alternating cool-wet and cold-dry climate episodes driven by precession orbital cycles. This occurrence of alternating mixed carbonate–siliciclastic sedimentation and pelagic sediments represents a unique occurrence in the geologic record. This research was supported by projects CGL2005-06224/BTE and CGL2007-65832/BTE financed by the Spanish Ministry of Education and Science (MEC), the European Found of Regional Development (FEDER), and Research Group RNM-163 and RNM-200 of the Junta de Andalucía. Article in Journal/Newspaper Planktonic foraminifera RUA - Repositorio Institucional de la Universidad de Alicante Journal of Sedimentary Research 79 5 302 315 |
institution |
Open Polar |
collection |
RUA - Repositorio Institucional de la Universidad de Alicante |
op_collection_id |
ftunivalicante |
language |
English |
topic |
Mixed siliciclastic-carbonate shelf Late Miocene Guadix Basin Estratigrafía |
spellingShingle |
Mixed siliciclastic-carbonate shelf Late Miocene Guadix Basin Estratigrafía García García, Fernando Soria Mingorance, Jesús Miguel Viseras Alarcón, César Fernández Martínez, Juan High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
topic_facet |
Mixed siliciclastic-carbonate shelf Late Miocene Guadix Basin Estratigrafía |
description |
Rhythmites in pelagic sediments can include information on paleoclimate and with orbital cycles. This paper documents and interprets an unusual rhythmic succession from a cool-water shallow-marine shelf that includes features of Mediterranean-type ramps and open-ocean-type ramps. In the subsiding southwestern margin of the Guadix Basin (southern Spain, Betic Cordillera), during the late Tortonian, a 640-m-thick succession was deposited over a short period (7.8–7.2 Ma). This succession contains 30 sedimentary packages or rhythmites, each defined by two facies associations: a mixed cross-stratified siliciclastic–skeletal sandstone and a homogeneous marl rich in planktonic foraminifera. Sandstones ranging in thickness from 3 m to 20 m contain coralline algae, bivalves, bryozoans, benthic foraminifera, echinoids, and brachiopods (typical temperate-water shelf biofacies). These units exhibit cross-strata sets up to four meters high, interpreted to have been produced by strong unidirectional currents. The marly deposits range in thickness from 2 to 17 m and contain an association of cold-water planktonic foraminifera as well as thin sandstone layers that exhibit normal grading corresponding to typical incomplete Bouma sequences or a lower division with planar lamination and an upper division of very fine- to fine-grained sandstone with hummocky and swaly cross-stratification. On the basis of the sedimentary structures, the sandstone layers are interpreted as sporadic turbidity flows and storm ebb–surge deposits. On the basis of the sedimentary structures, the hydrodynamic conditions during deposition of the mixed siliciclastic–carbonate interval were high-energy. Based on sedimentary and biogenic features of the rhythmites and their temporal durations (ca. 20 ka), rhythmicity is interpreted to reflect alternating cool-wet and cold-dry climate episodes driven by precession orbital cycles. This occurrence of alternating mixed carbonate–siliciclastic sedimentation and pelagic sediments represents a unique occurrence in the geologic record. This research was supported by projects CGL2005-06224/BTE and CGL2007-65832/BTE financed by the Spanish Ministry of Education and Science (MEC), the European Found of Regional Development (FEDER), and Research Group RNM-163 and RNM-200 of the Junta de Andalucía. |
author2 |
Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente Cambios Paleoambientales |
format |
Article in Journal/Newspaper |
author |
García García, Fernando Soria Mingorance, Jesús Miguel Viseras Alarcón, César Fernández Martínez, Juan |
author_facet |
García García, Fernando Soria Mingorance, Jesús Miguel Viseras Alarcón, César Fernández Martínez, Juan |
author_sort |
García García, Fernando |
title |
High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
title_short |
High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
title_full |
High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
title_fullStr |
High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
title_full_unstemmed |
High-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (Late Miocene, Guadix Basin, Spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
title_sort |
high-frequency rhythmicity in a mixed siliciclastic–carbonate shelf (late miocene, guadix basin, spain): a model of interplay between climatic oscillations, subsidence, and sediment dispersal |
publisher |
Society for Sedimentary Geology (SEPM) |
publishDate |
2009 |
url |
http://hdl.handle.net/10045/33735 https://doi.org/10.2110/jsr.2009.028 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
http://dx.doi.org/10.2110/jsr.2009.028 Journal of Sedimentary Research. 2009, 79(5): 302-315. doi:10.2110/jsr.2009.028 1527-1404 (Print) 1938-3681 (Online) http://hdl.handle.net/10045/33735 doi:10.2110/jsr.2009.028 |
op_rights |
Copyright © 2009, SEPM (Society for Sedimentary Geology) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.2110/jsr.2009.028 |
container_title |
Journal of Sedimentary Research |
container_volume |
79 |
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5 |
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302 |
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315 |
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1766170103366287360 |