Newsletters on Stratigraphy最新文献

{"title":"Aptian carbon-isotope record from the Sergipe-Alagoas Basin: New insights into oceanic anoxic event 1a and the timing of seawater entry into the South Atlantic","authors":"L. R. Tedeschi, H. Jenkyns, S. Robinson, C. C. Lana, Maria Rosilene F. Menezes Santos, F. M. Tognoli","doi":"10.1127/nos/2019/0529","DOIUrl":"https://doi.org/10.1127/nos/2019/0529","url":null,"abstract":"","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46222590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revised upper Barremian–upper Aptian planktonic foraminiferal biostratigraphy of the Gorgo a Cerbara section (central Italy)","authors":"R. Coccioni","doi":"10.1127/NOS/2019/0539","DOIUrl":"https://doi.org/10.1127/NOS/2019/0539","url":null,"abstract":"","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42849457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-resolution conodont biostratigraphy in two key sections from the Carnic Alps (Grüne Schneid) and Graz Paleozoic (Trolp) – implications for the biozonation concept at the Devonian-Carboniferous boundary","authors":"S. I. Kaiser, Tomáš Kumpan, M. Rasser","doi":"10.1127/NOS/2019/0520","DOIUrl":"https://doi.org/10.1127/NOS/2019/0520","url":null,"abstract":"","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49263843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sr-isotope stratigraphy (87Sr/86Sr) of the lowermost Toarcian of Peniche, Portugal, and its relation to ammonite zonations","authors":"J. McArthur, K. Page, L. V. Duarte, M. Thirlwall, Q. Li, R. Weis, M. J. Comas-Rengifo","doi":"10.1127/NOS/2019/0492","DOIUrl":"https://doi.org/10.1127/NOS/2019/0492","url":null,"abstract":"At Peniche, Portugal, the GSSP for the base of the Toarcian and in a Submediterranean province, a value of 0.707 073 ± 0.000 002 (2s.e., n = 13) is determined for 87Sr/86Sr at the base of the Toarcian. In Yorkshire, UK, a Subboreal province, the base of the Toarcian has an 87Sr/86Sr value of0.707 072 ± 0.000 002 (2s.e., n = 23). The similarity of the values shows that, within analytical uncertainty, these levels are exactly equivalent in time. At Peniche, the base of the Serpentinum (Falciferum/Levisoni) Chronozone has an 87Sr/86Sr value of 0.707 096 ± 0.000 003 (2.s.e). The value for this boundary in Yorkshire is 0.707 094 ± 0.000 002 (2s.e., n = 27). The similarity of the values shows that, within analytical uncertainty, these levels are exactly equivalent in time. The same ammonite successions occur through the lowermost Toarcian successions at Peniche and in Yorkshire. Between Peniche and Yorkshire, there is therefore an exact coincidence, within measurement uncertainty, between the Lower Toarcian, Tethyan Realm, Tenuicostatum (Polymorphum) [ammonite] Chronozone of Peniche and the Lower Toarcian, Boreal Realm, Tenuicostatum [ammonite] Chronozone of Yorkshire. The 87Sr/86Sr profile through the Tenuicostatum Subchronozone at Peniche reveals large variations in sedimentation rate, with lowest rates in a condensed basal 3 m of the zone, highest rates in mid-zone, with rates decreasing upward through the upper half of the zone. Apportioning time in proportion to 87Sr/86Sr shows that around half of Tenuicostatum time is condensed into the basal 3 m of the section.","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43164964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carboniferous conodont zonation of China","authors":"Ke-yi Hu, Yu-Ping Qi, Wenkun Qie, Qiulai Wang","doi":"10.1127/NOS/2019/0498","DOIUrl":"https://doi.org/10.1127/NOS/2019/0498","url":null,"abstract":"","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/NOS/2019/0498","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49061857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tephrochronology and chronostratigraphy of the Miocene Chilcatay and Pisco formations (East Pisco Basin, Peru)","authors":"G. Bosio, E. Malinverno, I. Villa, C. D. Celma, K. Gariboldi, A. Gioncada, V. Barberini, M. Urbina, G. Bianucci","doi":"10.1127/NOS/2019/0525","DOIUrl":"https://doi.org/10.1127/NOS/2019/0525","url":null,"abstract":"Strata of Chilcatay and Pisco formations exposed in the Ica Desert (East Pisco Basin, southern Peru) preserve one of the most complete and rich records of Miocene marine vertebrates of the world. Despite its exceptional importance, the chronostratigraphy of these fossil-bearing deposits has been only sporadically studied in the literature until recently. This work presents a detailed reconstruction of the chronostratigraphic framework, achieved by mapping and measuring of seven sections (totaling a height of almost 1000 m) of the Miocene Chilcatay and Pisco formations along the western side of the Ica River. The Chilcatay Formation consists of two allomembers, namely Ct1 and Ct2, bounded at the base by unconformities CE0.1 and CE0.2, respectively. Similarly, the immediately overlying Pisco Formation is divided into allomembers P0, P1, and P2, bounded at the base by unconformities PE0.0, PE0.1 and PE0.2, respectively. The new 39Ar–40Ar results presented here, combined with ages of previous work, provide precise constraints on the age of several stratigraphically referenced volcanic ash layers intercalated in the studied fossil-bearing succession, placing its vertebrate fossil fauna within a refined temporal framework and laying the solid ground for its detailed regional and global comparison. The ages of the allomembers, and thus their associated faunas, can be reliably estimated by the combination of 39Ar–40Ar dating on tephra layers with diatom biostratigraphy. In the study area, two methods are mutually consistent and constrain the deposition of the Chilcatay Formation between 19.2 and 18.0 Ma, that of P1 between 9.5 and 8.6 Ma, and that of P2 between 8.4 and 6.7 Ma. In the absence of direct dating of the P0 allomember, which lacks both preserved tephra suitable for 39Ar–40Ar dating and microfossils, its age can be constrained to the temporal gap between the youngest age available from the underlying Chilcatay strata (18.0 Ma) and the oldest age available from the overlying P1 strata (9.5 Ma).","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/NOS/2019/0525","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63663337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The onset of Oceanic Anoxic Event 2 on the Arabian Shelf – mechanisms between organic matter deposition, sea-level, and palaeoceanography (Shilaif Basin, United Arab Emirates)","authors":"Dominik Hennhoefer, A. A. Suwaidi, T. Steuber","doi":"10.1127/NOS/2019/0504","DOIUrl":"https://doi.org/10.1127/NOS/2019/0504","url":null,"abstract":"","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/NOS/2019/0504","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42993341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Palynological, geochemical, and mineralogical characteristics of the Early Jurassic Liasidium Event in the Cleveland Basin, Yorkshire, UK","authors":"S. Hesselbo, Alexander J.L. Hudson, J. Huggett, M. Leng, J. Riding, C. Ullmann","doi":"10.1127/NOS/2019/0536","DOIUrl":"https://doi.org/10.1127/NOS/2019/0536","url":null,"abstract":"! \" # $ \" # % & # '() * + , ) + & # + & , ) # & & + ) . / # 0 # # ) $ & 0 # ) . ! \" # + # 1 + # # + )","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/NOS/2019/0536","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41779820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleogene carbonate systems of Saint Barthélemy, Lesser Antilles: stratigraphy and general organization","authors":"J. Cornée, M. BouDagher-Fadel, M. Philippon, J. Léticée, L. Legendre, G. Maincent, J. Lebrun, P. Münch","doi":"10.1127/nos/2020/0587","DOIUrl":"https://doi.org/10.1127/nos/2020/0587","url":null,"abstract":"Saint Barthelemy is the only island of the northern Lesser Antilles where it is possible to investigate in the detail the chronostratigraphy of the mixed carbonate-volcaniclastic deposits of the Paleogene Caribbean volcanic arc. Based on field mapping and new biostratigraphical and sedimentological data, we study the limestone units interbedded in the Paleogene volcaniclastic deposits. We find that four main carbonate units occur instead of previously believed six ones. Based on the ages given by the foraminifera assemblages, and taking into account the recently published 40Ar/39Ar ages of magmatic rocks, the Lower Limestone unit dates Lutetian, the Intermediate Limestone unit late (?) Bartonian-late Priabonian, the Upper Limestone late Priabonian and the Top Limestone unit early Miocene. The Paleogene carbonate beds were deposited on gently dipping submarine volcaniclastic deposits issued from emergent volcanoes, in muddy, unrimmed inner to mid-ramp setting dominated by bottom communities. A major subaerial unconformity is evidenced during the Oligocene, most probably corresponding to uplift affecting Saint Barthelemy. Our work offers a revised lithostratigraphic succession of Saint Barthelemy as a first key-point for further studies of the Paleogene Caribbean arc deposits which were dismembered following the entrance of the Bahamas Bank in the Lesser Antilles subduction zone.","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45132504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Should Unit-Stratotypes and Astrochronozones be formally defined? A dual proposal (including postscriptum)","authors":"F. Hilgen, L. Lourens, H. Pälike","doi":"10.1127/nos/2019/0514","DOIUrl":"https://doi.org/10.1127/nos/2019/0514","url":null,"abstract":"","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44105953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}