Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece
This study investigates the depositional environments and soft sediment deformation within the Early Jurassic Ammonitico Rosso Formation in the External Ionian Basin (Western Greece), focusing on its biostratigraphy, sedimentology, and tectonic activity. This research provides new insights into the...
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2025-01-01
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| author | Vasilis Golfinopoulos David J. W. Piper Avraam Zelilidis Georgia Pe-Piper Penelope Papadopoulou Nicolina Bourli George Iliopoulos |
| author_facet | Vasilis Golfinopoulos David J. W. Piper Avraam Zelilidis Georgia Pe-Piper Penelope Papadopoulou Nicolina Bourli George Iliopoulos |
| author_sort | Vasilis Golfinopoulos |
| collection | DOAJ |
| description | This study investigates the depositional environments and soft sediment deformation within the Early Jurassic Ammonitico Rosso Formation in the External Ionian Basin (Western Greece), focusing on its biostratigraphy, sedimentology, and tectonic activity. This research provides new insights into the depositional environment of the Ammonitico Rosso Formation and its transitions with the underlying and overlying formations. Syn-rift tectonics at the time of deposition formed half-grabens, which influenced sedimentary processes and created conditions for seabed slumping. Detailed field mapping and microfacies analysis revealed two distinct depositional environments: deep-water to open-shelf settings and platform-margin reefs. The entire Ammonitico Rosso Formation is allochthonous, deposited as repetitive slices of little-disturbed stratified sediments capped by debrites near the toe of a complex submarine landslide. The presence of well-preserved fossils, such as planktonic and benthic foraminifera, Radiolaria (both Spumellaria and Nassellaria), and ammonites, allowed precise age determinations, suggesting that the first appearance of <i>Globuligerina</i> might predate previous records, occurring first in the Pliensbachian rather than the Toarcian. These findings contribute to the ongoing debate on the depth and conditions of Ammonitico Rosso deposition, supporting the hypothesis of a relatively deep, open-shelf environment influenced by slope instability. |
| format | Article |
| id | doaj-art-e998258242204d85b45426449fa9fb80 |
| institution | Kabale University |
| issn | 2076-3263 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Geosciences |
| spelling | doaj-art-e998258242204d85b45426449fa9fb802025-01-24T13:34:08ZengMDPI AGGeosciences2076-32632025-01-011511010.3390/geosciences15010010Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western GreeceVasilis Golfinopoulos0David J. W. Piper1Avraam Zelilidis2Georgia Pe-Piper3Penelope Papadopoulou4Nicolina Bourli5George Iliopoulos6Department of Geology, University of Patras, 265 04 Patras, GreeceDepartment of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, CanadaDepartment of Geology, University of Patras, 265 04 Patras, GreeceDepartment of Geology, Saint Mary’s University, Halifax, NS B3H 3C3, CanadaDepartment of Geology, University of Patras, 265 04 Patras, GreeceDepartment of Geology, University of Patras, 265 04 Patras, GreeceDepartment of Geology, University of Patras, 265 04 Patras, GreeceThis study investigates the depositional environments and soft sediment deformation within the Early Jurassic Ammonitico Rosso Formation in the External Ionian Basin (Western Greece), focusing on its biostratigraphy, sedimentology, and tectonic activity. This research provides new insights into the depositional environment of the Ammonitico Rosso Formation and its transitions with the underlying and overlying formations. Syn-rift tectonics at the time of deposition formed half-grabens, which influenced sedimentary processes and created conditions for seabed slumping. Detailed field mapping and microfacies analysis revealed two distinct depositional environments: deep-water to open-shelf settings and platform-margin reefs. The entire Ammonitico Rosso Formation is allochthonous, deposited as repetitive slices of little-disturbed stratified sediments capped by debrites near the toe of a complex submarine landslide. The presence of well-preserved fossils, such as planktonic and benthic foraminifera, Radiolaria (both Spumellaria and Nassellaria), and ammonites, allowed precise age determinations, suggesting that the first appearance of <i>Globuligerina</i> might predate previous records, occurring first in the Pliensbachian rather than the Toarcian. These findings contribute to the ongoing debate on the depth and conditions of Ammonitico Rosso deposition, supporting the hypothesis of a relatively deep, open-shelf environment influenced by slope instability.https://www.mdpi.com/2076-3263/15/1/10Ammonitico RossoslumpsToarcianplanktonic foraminifera |
| spellingShingle | Vasilis Golfinopoulos David J. W. Piper Avraam Zelilidis Georgia Pe-Piper Penelope Papadopoulou Nicolina Bourli George Iliopoulos Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece Geosciences Ammonitico Rosso slumps Toarcian planktonic foraminifera |
| title | Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece |
| title_full | Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece |
| title_fullStr | Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece |
| title_full_unstemmed | Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece |
| title_short | Depositional Environments and Soft Sediment Deformation in the Early Jurassic Ammonitico Rosso Formation of Western Greece |
| title_sort | depositional environments and soft sediment deformation in the early jurassic ammonitico rosso formation of western greece |
| topic | Ammonitico Rosso slumps Toarcian planktonic foraminifera |
| url | https://www.mdpi.com/2076-3263/15/1/10 |
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