High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain)
The upper Miocene Parilla Formation, Lorca Basin, Spain, provides an example of stacked high-frequency cycles of mixed carbonates and siliciclastics. Cycles developed on a steep carbonate ramp bordering an alluvialfan system. Three cycle variants are distinguished: siliciclastic-dominated cycles at...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2006-01-01
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| Series: | Geologica Acta |
| Subjects: | |
| Online Access: | https://revistes.ub.edu/index.php/GEOACTA/article/view/1879 |
| _version_ | 1797654639005401088 |
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| author | M.R. TALBOT C. THRANA |
| author_facet | M.R. TALBOT C. THRANA |
| author_sort | M.R. TALBOT |
| collection | DOAJ |
| description | The upper Miocene Parilla Formation, Lorca Basin, Spain, provides an example of stacked high-frequency cycles of mixed carbonates and siliciclastics. Cycles developed on a steep carbonate ramp bordering an alluvialfan system. Three cycle variants are distinguished: siliciclastic-dominated cycles at the proximal part of the ramp, mid-ramp mixed carbonate – siliciclastic cycles, and carbonate-dominated cycles on the more distal parts of the ramp. The vertical thickness of these stacked simple sequences ranges from 0.7 up to 8 m. High-frequency changes in relative sea level resulted in a dynamic interplay between terrigenous sediment supply and carbonate production rates. During falling stage and lowstands, the alluvial system migrated basinwards and coarse-grained siliciclastics were deposited, whereas rising sea level and highstands provided optimal conditions for the production and accumulation of biogenic carbonates. Coral colonies up to 4 m thick provide a minimum measure of the magnitude of sea-level change involved in the development of the cycles. In contrast to previously documented simple carbonate sequences, this hybrid system of carbonates and siliciclastics preserves a more complete record of cyclic sea-level change, where terrigenous sediment supply compensated for the reduction in carbonate production during periods of falling and low sea level. |
| first_indexed | 2024-03-11T17:02:25Z |
| format | Article |
| id | doaj.art-8fc9fecea8384b9cbc48e7a490fa0586 |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:02:25Z |
| publishDate | 2006-01-01 |
| publisher | Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
| record_format | Article |
| series | Geologica Acta |
| spelling | doaj.art-8fc9fecea8384b9cbc48e7a490fa05862023-10-20T07:12:09ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282006-01-014310.1344/105.000000348High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain)M.R. TALBOT0C. THRANA1University of Bergen, Department of Earth Science. 5007 Bergen, Norway.University of Bergen, Department of Earth Science. 5007 Bergen, Norway.The upper Miocene Parilla Formation, Lorca Basin, Spain, provides an example of stacked high-frequency cycles of mixed carbonates and siliciclastics. Cycles developed on a steep carbonate ramp bordering an alluvialfan system. Three cycle variants are distinguished: siliciclastic-dominated cycles at the proximal part of the ramp, mid-ramp mixed carbonate – siliciclastic cycles, and carbonate-dominated cycles on the more distal parts of the ramp. The vertical thickness of these stacked simple sequences ranges from 0.7 up to 8 m. High-frequency changes in relative sea level resulted in a dynamic interplay between terrigenous sediment supply and carbonate production rates. During falling stage and lowstands, the alluvial system migrated basinwards and coarse-grained siliciclastics were deposited, whereas rising sea level and highstands provided optimal conditions for the production and accumulation of biogenic carbonates. Coral colonies up to 4 m thick provide a minimum measure of the magnitude of sea-level change involved in the development of the cycles. In contrast to previously documented simple carbonate sequences, this hybrid system of carbonates and siliciclastics preserves a more complete record of cyclic sea-level change, where terrigenous sediment supply compensated for the reduction in carbonate production during periods of falling and low sea level.https://revistes.ub.edu/index.php/GEOACTA/article/view/1879Mixed carbonates-siliciclasticsCyclical sedimentationSea-level changeMioceneSpain. |
| spellingShingle | M.R. TALBOT C. THRANA High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain) Geologica Acta Mixed carbonates-siliciclastics Cyclical sedimentation Sea-level change Miocene Spain. |
| title | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain) |
| title_full | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain) |
| title_fullStr | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain) |
| title_full_unstemmed | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain) |
| title_short | High-frequency carbonate-siliciclastic cycles in the Miocene of the Lorca BASIN (Western Mediterranean, SE Spain) |
| title_sort | high frequency carbonate siliciclastic cycles in the miocene of the lorca basin western mediterranean se spain |
| topic | Mixed carbonates-siliciclastics Cyclical sedimentation Sea-level change Miocene Spain. |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/1879 |
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