Newsletters on Stratigraphy最新文献_第5页

Barremian–early Aptian charophyte biostratigraphy revisited 巴雷米亚-早期阿普提亚苔藓生物地层学重新研究

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-06-25 DOI: 10.1127/nos/2021/0662

J. Pérez-Cano, T. Bover‐Arnal, C. Martín‐Closas

引用次数: 7

Bio- and chemostratigraphy of the Posidonia Shale: a new database for the Toarcian Oceanic Anoxic Event from northern Germany Posidonia页岩的生物和化学地层学:德国北部Toarcian海洋缺氧事件的新数据库

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-06-25 DOI: 10.1127/nos/2021/0658

S. Visentin, E. Erba, J. Mutterlose

引用次数: 6

Foraminifers in the Holkerian Stratotype, regional substage in Britain: key taxa for the Viséan subdivision 英国Holkerian层型的有孔虫，区域亚阶段:vissaman细分的关键分类群

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-05-12 DOI: 10.1127/NOS/2021/0674

P. Cózar, I. Somerville, M. Hounslow

{"title":"Foraminifers in the Holkerian Stratotype, regional substage in Britain: key taxa for the Viséan subdivision","authors":"P. Cózar, I. Somerville, M. Hounslow","doi":"10.1127/NOS/2021/0674","DOIUrl":"https://doi.org/10.1127/NOS/2021/0674","url":null,"abstract":"Foraminiferal revision of the Holkerian Stratotype of Britain at Barker Scar, Holker Hall, south Cumbria, UK, allows the subdivision of the section into the Cf4δ, Cf5α and Cf5β subzones (the latter being further subdivided into lower Cf5β1 and upper Cf5β2 intervals). The base of Cf5α subzone at the base of bed C and base of Cf5β subzone from the middle part of bed C, occur at 14 m and 10.5 m, respectively, below the traditional basal boundary of the Holkerian at bed K. The lower boundaries of these foraminiferal subzones occur within the main interval affected by dolomitization in the section, which poses problems in defining precisely the bases for these subzones. Nevertheless, in spite of the dolomitization, a more or less continuous foraminiferal record allows a solid correlation of the base of the Cf5β with the preserved succession in the Livian Substage (defined in Belgium, but also used in France), and it is assumed that the base of this substage should correspond to the base of the Cf5α subzone. The base of the Cf5α subzone can be correlated with the base of the Russian Tulian Substage, since it contains many taxa in common with the Holkerian. However, further investigation is needed to establish other levels of correlation (e. g., base of the Cf5β subzone) higher up in the Holkerian substage. All of these problems suggest that the Holkerian, as it is currently recognised, and the Barker Scar stratotype section, in particular, should be reconsidered, and a new para-stratotype section, ideally devoid of dolomitization, should be located and investigated, in order to corroborate the occurrence of the Cf5α and Cf5β foraminiferal subzones compared to those recognised in the Barker Scar Stratotype. These modifications would allow identification of an apparent synchronous faunal event forming the basis of a future subdivision of the Visean.","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48764429","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}

引用次数: 6

Permian autochthony of northwestern Mexico based on conodont paleogeographic relationships with southwestern Laurentia 基于牙形石古地理关系的墨西哥西北部二叠纪原住民

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-04-15 DOI: 10.1127/NOS/2021/0620

R. A. Lara-Peña, P. Navas-Parejo, M. Torres-Martínez

引用次数: 1

Jurassic–Cretaceous transition in the Transdanubian Range (Hungary): integrated stratigraphy and paleomagnetic study of the Hárskút and Lókút sections Transdanubian山脉（匈牙利）的侏罗纪-白垩纪过渡：Hárskút和Lókú特剖面的综合地层学和古地磁研究

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-04-15 DOI: 10.1127/NOS/2021/0656

D. Lodowski, A. Pszczółkowski, O. Szives, I. Főzy, J. Grabowski

引用次数: 3

Redox element record shows that environmental perturbations associated with the T-OAE were of longer duration than the carbon isotope record suggests – the Aubach section, SW Germany 氧化还原元素记录表明，与T-OAE相关的环境扰动持续时间比碳同位素记录显示的要长——德国西南部奥巴赫剖面

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-04-09 DOI: 10.1127/nos/2020/0630

I. W. Hougård, J. Bojesen‐Koefoed, Madeleine L. Vickers, C. Ullmann, C. Bjerrum, M. Rizzi, C. Korte

{"title":"Redox element record shows that environmental perturbations associated with the T-OAE were of longer duration than the carbon isotope record suggests – the Aubach section, SW Germany","authors":"I. W. Hougård, J. Bojesen‐Koefoed, Madeleine L. Vickers, C. Ullmann, C. Bjerrum, M. Rizzi, C. Korte","doi":"10.1127/nos/2020/0630","DOIUrl":"https://doi.org/10.1127/nos/2020/0630","url":null,"abstract":". The Early Jurassic Toarcian Oceanic Anoxic Event (T-OAE) with its associated carbon-isotope excursion (CIE) was possibly one of the most pronounced periods of widespread oxygen deficiency in the Mesozoic ocean. The event has been extensively studied in order to understand the processes triggering the environmental perturbations and the extreme oxygen depletion in many marine basins. However, comparatively little focus has been placed on the end of the positive CIE and the stratigraphic coherent end of anoxic-euxinic conditions. In the present study, we constrain the stratigraphic extent of anoxic-euxinic conditions and define the termination of the positive CIE in the Swabo-Franconian Basin covering the Lower Toarcian strata using carbon-isotope ratios, organic matter pyrolysis and redox-sensitive element concentrations of outcrop samples from the Aubach section. Bulk organic carbon-isotope values, corrected for changes in type of organic matter using the Hydrogen Index (HI), suggest that the amplitude of the negative CIE in organic matter is as little as 3.3–3.5 ‰, in contrast to 4.5 ‰ change in δ 13 C carb in the same section. Enrichment in redox-sensitive proxies (V/Al and DOP-T) and %TOC suggest that environmental perturbations associated with the T-OAE continued until the upper falciferum Zone in the Aubach section. This indicates that anoxic–euxinic conditions terminated in the same stratigraphic interval in which δ 13 C values return to steady, light values at ~–28 ‰ (termination of positive CIE). This synchronism in the return to normal marine conditions is also observed in the southern Paris Basin, but not in the Cleveland Basin.","PeriodicalId":49750,"journal":{"name":"Newsletters on Stratigraphy","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2021-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48645558","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}

引用次数: 6

Calcareous nannofossil biostratigraphy across the Paleocene-Eocene Thermal Maximum 古新世-始新世热极大期的钙质纳米化石生物地层学

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-04-01 DOI: 10.1127/NOS/2021/0621

Alessandro Menini, E. Mattioli, Arnauld Vinçon-Laugier, G. Suan

引用次数: 2

Comments on “New insight on the age of the Aparein black shales in the Basque-Cantabrian Basin, northern Spain” Frau, Camille. 评《西班牙北部巴斯克-坎塔布连盆地Aparein黑色页岩时代的新认识》Frau, Camille。

IF 2.2 3区地球科学

Newsletters on Stratigraphy Pub Date : 2021-04-01 DOI: 10.1127/NOS/2021/0668

P. A. Fernández‐Mendiola, J. García‐Mondéjar, H. Owen

引用次数: 1

Dinoflagellate cysts of the upper Campanian–basal Maastrichtian (Upper Cretaceous) of the Middle Vistula River section (central Poland): stratigraphic succession, correlation potential and taxonomy 波兰中部维斯瓦河中段(上白垩世)坎帕尼亚-基底马斯特里希特(上白垩世)的鞭毛藻囊肿:地层演替、对比潜力和分类