{"title":"摩洛哥阿特拉斯西部的阿尔卑斯沉积作用","authors":"Etienne Jaillard , Emmanuel Robert , Jean-Louis Latil , Moussa Masrour","doi":"10.1016/j.cretres.2024.105872","DOIUrl":null,"url":null,"abstract":"<div><p>Detailed study of field sections and extensive ammonite collection allowed to specify the sedimentary evolution and age of the Albian series of the Western Atlas (Morocco). After a significant hiatus of earliest Albian age, the Albian transgression began in the late <em>Douvilleiceras leightonense</em> Zone with partly clastic deposits. A transgressive pulse gave way to clayey marl deposits (<em>Douvilleiceras mammillatum</em> Zone), which evolved upward to partly carbonate, laminated deposits of late early Albian to earliest middle Albian age (<em>Lyelliceras pseudolyelli</em> to early <em>Lyelliceras lyelli</em> zones). A major hiatus that encompassed most of the middle Albian, was followed by a new transgression marked first by sandy deposits (<em>Dipoloceras cristatum</em> and <em>Pervinquiria pricei</em> zones), and then by clayey marl and limestone nodules (<em>Pervinquieria inflata</em> Zone). A sharp sea level fall (late <em>Pervinquieria inflata</em> to early <em>Pervinquieria fallax</em> zones) led to the development of a shallow marine carbonate shelf (Kechoula Formation). A last transgressive pulse allowed deposition of outer shelf clayey marls (<em>Pervinquieria rostrata</em> to <em>Arrhaphoceras briacensis</em> (?) zones), interrupted near the Albian-Cenomanian boundary by a sea level fall and hiatus. Anoxic to disoxic conditions are recorded in the latest early Albian and the late Albian, which correlate with the Leenhardt and Breistroffer levels, respectively. Correlations with Albian successions in North Africa and southern Europe suggest a mainly eustatic origin for the most important sedimentary discontinuities, although the late Albian sea-level drop may be tectonically enhanced.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0195667124000454/pdfft?md5=411ea5653d727c8ede528287472b803c&pid=1-s2.0-S0195667124000454-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Albian sedimentation in western Atlas, Morocco\",\"authors\":\"Etienne Jaillard , Emmanuel Robert , Jean-Louis Latil , Moussa Masrour\",\"doi\":\"10.1016/j.cretres.2024.105872\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Detailed study of field sections and extensive ammonite collection allowed to specify the sedimentary evolution and age of the Albian series of the Western Atlas (Morocco). After a significant hiatus of earliest Albian age, the Albian transgression began in the late <em>Douvilleiceras leightonense</em> Zone with partly clastic deposits. A transgressive pulse gave way to clayey marl deposits (<em>Douvilleiceras mammillatum</em> Zone), which evolved upward to partly carbonate, laminated deposits of late early Albian to earliest middle Albian age (<em>Lyelliceras pseudolyelli</em> to early <em>Lyelliceras lyelli</em> zones). A major hiatus that encompassed most of the middle Albian, was followed by a new transgression marked first by sandy deposits (<em>Dipoloceras cristatum</em> and <em>Pervinquiria pricei</em> zones), and then by clayey marl and limestone nodules (<em>Pervinquieria inflata</em> Zone). A sharp sea level fall (late <em>Pervinquieria inflata</em> to early <em>Pervinquieria fallax</em> zones) led to the development of a shallow marine carbonate shelf (Kechoula Formation). A last transgressive pulse allowed deposition of outer shelf clayey marls (<em>Pervinquieria rostrata</em> to <em>Arrhaphoceras briacensis</em> (?) zones), interrupted near the Albian-Cenomanian boundary by a sea level fall and hiatus. Anoxic to disoxic conditions are recorded in the latest early Albian and the late Albian, which correlate with the Leenhardt and Breistroffer levels, respectively. Correlations with Albian successions in North Africa and southern Europe suggest a mainly eustatic origin for the most important sedimentary discontinuities, although the late Albian sea-level drop may be tectonically enhanced.</p></div>\",\"PeriodicalId\":55207,\"journal\":{\"name\":\"Cretaceous Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-03-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0195667124000454/pdfft?md5=411ea5653d727c8ede528287472b803c&pid=1-s2.0-S0195667124000454-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cretaceous Research\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0195667124000454\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cretaceous Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0195667124000454","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOLOGY","Score":null,"Total":0}
Detailed study of field sections and extensive ammonite collection allowed to specify the sedimentary evolution and age of the Albian series of the Western Atlas (Morocco). After a significant hiatus of earliest Albian age, the Albian transgression began in the late Douvilleiceras leightonense Zone with partly clastic deposits. A transgressive pulse gave way to clayey marl deposits (Douvilleiceras mammillatum Zone), which evolved upward to partly carbonate, laminated deposits of late early Albian to earliest middle Albian age (Lyelliceras pseudolyelli to early Lyelliceras lyelli zones). A major hiatus that encompassed most of the middle Albian, was followed by a new transgression marked first by sandy deposits (Dipoloceras cristatum and Pervinquiria pricei zones), and then by clayey marl and limestone nodules (Pervinquieria inflata Zone). A sharp sea level fall (late Pervinquieria inflata to early Pervinquieria fallax zones) led to the development of a shallow marine carbonate shelf (Kechoula Formation). A last transgressive pulse allowed deposition of outer shelf clayey marls (Pervinquieria rostrata to Arrhaphoceras briacensis (?) zones), interrupted near the Albian-Cenomanian boundary by a sea level fall and hiatus. Anoxic to disoxic conditions are recorded in the latest early Albian and the late Albian, which correlate with the Leenhardt and Breistroffer levels, respectively. Correlations with Albian successions in North Africa and southern Europe suggest a mainly eustatic origin for the most important sedimentary discontinuities, although the late Albian sea-level drop may be tectonically enhanced.
期刊介绍:
Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings.
Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale.
Research Areas include:
• Regional geology
• Stratigraphy and palaeontology
• Palaeobiology
• Palaeobiogeography
• Palaeoceanography
• Palaeoclimatology
• Evolutionary Palaeoecology
• Geochronology
• Global events.