The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography
New biostratigraphic data reported by Le Nindre et al. (2023 – this volume) improve the sequence stratigraphic understanding of the Middle–Late Triassic mixed carbonate-silicilclastic Jilh Formation and overlying siliciclastic Minjur Formation at outcrop in Central Saudi Arabia. The Anisian Tr40, La...
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Académie des sciences
2023-07-01
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| Series: | Comptes Rendus. Géoscience |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.227/ |
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| author | Le Nindre, Yves-Michel Davies, Roger Brett Issautier, Benoit Krystyn, Leopold Vaslet, Denis Vrielynck, Bruno Memesh, Abdullah |
| author_facet | Le Nindre, Yves-Michel Davies, Roger Brett Issautier, Benoit Krystyn, Leopold Vaslet, Denis Vrielynck, Bruno Memesh, Abdullah |
| author_sort | Le Nindre, Yves-Michel |
| collection | DOAJ |
| description | New biostratigraphic data reported by Le Nindre et al. (2023 – this volume) improve the sequence stratigraphic understanding of the Middle–Late Triassic mixed carbonate-silicilclastic Jilh Formation and overlying siliciclastic Minjur Formation at outcrop in Central Saudi Arabia. The Anisian Tr40, Ladinian Tr50, Julian Tr60, Tuvalian Tr70 and Alaunian Tr80 MFS are all identified and their ages discussed. A major Carnian–Norian hiatus (Tr80 SB) approximates to but notably cuts across the mapped Jilh–Minjur Formation boundary. A younger Late Norian–Rhaetian transgression (Tr90 MFS?) is also identified. All of these major transgressive–regressive sequences and hiatuses can be identified with confidence and correlated at the regional scale with time-equivalent carbonates. The ages of subsurface lithostratigraphic units identified elsewhere across the Arabian Plate, notably the “Jilh, Sefidar and Marker Dolomites”, “Jilh Evaporite” (sometimes “Carnian Salinity Crisis”) and the incertae sedis Baluti Formation, and their equivalence in the Saudi Arabian outcrops, are assessed in the light of these results. The presence of significant siliciclastics at the base of the Carnian stratigraphy (“Julian Clastic Event”) is also discussed.Ladinian conodont faunas belonging to the Sephardic Province (Iberia, North Africa) and associated vertebrate faunas confirm transgression from the north. Similar conclusions are drawn for the Carnian and Norian transgressions.The improved geochronologic understanding enabled a reconstruction of the structural phases of the Jilh geohistory in four steps from Anisian to Norian, showing the relationships of retrogradation–progradation processes and tectonic pulses to hiatuses and periods of erosion. A synthetic sequence stratigraphy is proposed. |
| format | Article |
| id | doaj-art-55e6ed9f507a445197b9305672301bcd |
| institution | Kabale University |
| issn | 1778-7025 |
| language | English |
| publishDate | 2023-07-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj-art-55e6ed9f507a445197b9305672301bcd2025-02-07T10:40:57ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252023-07-01355S29913510.5802/crgeos.22710.5802/crgeos.227The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeographyLe Nindre, Yves-Michel0Davies, Roger Brett1Issautier, Benoit2Krystyn, Leopold3Vaslet, Denis4Vrielynck, Bruno5Memesh, Abdullah6Geo-consultant (BRGM retired), 58 Rue Gustave Flaubert 45100, Orléans, FranceDavies Geoconsulting (retired), Wintergreen House, Queen’s Road, Harrogate, North Yorkshire, HG2 0HB, UKBRGM, 3, Avenue Claude Guillemin, B.P. 36009, 45060, Orléans Cedex 2, FranceDept. of Palaeontology (Geozentrum), University of Vienna, Althanstrasse 14, Josef-Holaubek-Platz 2 (UZA II) 1090 Vienna (retired), AustriaGeo-consultant (BRGM retired), 275 Route Royale, 33240 La Lande de Pomerol, FranceInstitut des Sciences de la Terre de Paris (UMR 7193), Université Pierre et Marie Curie (UPMC) (retired), FranceSaudi Geological Survey, 54141, Ahmed bin Mohammed Al Ashab St., Jeddah 21514, Saudi ArabiaNew biostratigraphic data reported by Le Nindre et al. (2023 – this volume) improve the sequence stratigraphic understanding of the Middle–Late Triassic mixed carbonate-silicilclastic Jilh Formation and overlying siliciclastic Minjur Formation at outcrop in Central Saudi Arabia. The Anisian Tr40, Ladinian Tr50, Julian Tr60, Tuvalian Tr70 and Alaunian Tr80 MFS are all identified and their ages discussed. A major Carnian–Norian hiatus (Tr80 SB) approximates to but notably cuts across the mapped Jilh–Minjur Formation boundary. A younger Late Norian–Rhaetian transgression (Tr90 MFS?) is also identified. All of these major transgressive–regressive sequences and hiatuses can be identified with confidence and correlated at the regional scale with time-equivalent carbonates. The ages of subsurface lithostratigraphic units identified elsewhere across the Arabian Plate, notably the “Jilh, Sefidar and Marker Dolomites”, “Jilh Evaporite” (sometimes “Carnian Salinity Crisis”) and the incertae sedis Baluti Formation, and their equivalence in the Saudi Arabian outcrops, are assessed in the light of these results. The presence of significant siliciclastics at the base of the Carnian stratigraphy (“Julian Clastic Event”) is also discussed.Ladinian conodont faunas belonging to the Sephardic Province (Iberia, North Africa) and associated vertebrate faunas confirm transgression from the north. Similar conclusions are drawn for the Carnian and Norian transgressions.The improved geochronologic understanding enabled a reconstruction of the structural phases of the Jilh geohistory in four steps from Anisian to Norian, showing the relationships of retrogradation–progradation processes and tectonic pulses to hiatuses and periods of erosion. A synthetic sequence stratigraphy is proposed.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.227/Saudi ArabiaTriassicJilh FormationMinjur SandstoneSequence stratigraphyCorrelationsPaleogeography |
| spellingShingle | Le Nindre, Yves-Michel Davies, Roger Brett Issautier, Benoit Krystyn, Leopold Vaslet, Denis Vrielynck, Bruno Memesh, Abdullah The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography Comptes Rendus. Géoscience Saudi Arabia Triassic Jilh Formation Minjur Sandstone Sequence stratigraphy Correlations Paleogeography |
| title | The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography |
| title_full | The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography |
| title_fullStr | The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography |
| title_full_unstemmed | The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography |
| title_short | The Middle to Late Triassic of Central Saudi Arabia with emphasis on the Jilh Formation. Part II: sequence stratigraphy, depositional and structural history, correlations and paleogeography |
| title_sort | middle to late triassic of central saudi arabia with emphasis on the jilh formation part ii sequence stratigraphy depositional and structural history correlations and paleogeography |
| topic | Saudi Arabia Triassic Jilh Formation Minjur Sandstone Sequence stratigraphy Correlations Paleogeography |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.227/ |
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