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Estonian Journal of Earth Sciences最新文献

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Developing a phylogenetic framework for tiny Ordovician brachiopods (Atrypida: Anazyginae and Catazyginae) from the eastern United States 美国东部奥陶系小型腕足动物系统发育框架的建立(atrypa: Anazyginae和Catazyginae)
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.73
Mariana Vilela-Andrade, A. Stigall
{"title":"Developing a phylogenetic framework for tiny Ordovician brachiopods (Atrypida: Anazyginae and Catazyginae) from the eastern United States","authors":"Mariana Vilela-Andrade, A. Stigall","doi":"10.3176/earth.2023.73","DOIUrl":"https://doi.org/10.3176/earth.2023.73","url":null,"abstract":"Elucidating how environmental change can facilitate the differentiation of evolutionary lineages and the establishment of new species is a critical issue for understanding both the history of life and modern biota. Notably, speciation events are known to be the main drivers of bio - diversification; thus, generating well-constrained phylogenetic hypotheses to investigate speciation processes and facilitators can provide key data on links between biogeography, speciation, and diversification. During the Great Ordovician Biodiversification Event (GOBE), articulate brachiopods were a key group on the rise. By the Middle to Late Ordovician, the brachiopod order Atrypida was no exception. The atrypids diversified greatly and established evolutionary novelties such as helical and calcite-supported lophophores. The Ordovician epi - continental seas in eastern Laurentia provided an excellent environment for reproductive isolation and speciation, with sea-level fluctuations, ideal climate conditions, and active tectonic settings. However, speciation patterns and drivers within two widely-distributed atrypid sub - families, Anazyginae ( Anazyga spp. and Zygospira spp. ) and Catazyginae ( Catazyga spp. ) , remain poorly known. In this project, we seek to develop a robust phylogenetic framework for these clades and use that framework to evaluate speciation processes and facilitators during the Late Ordovician. Morphological data will be collected from published","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"84 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77535170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse 晚奥陶世滩岩作为冰川融水脉动的远场指示物
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.13
Q. Li, L. Na, S. Yu, O. Lehnert, A. Munneck, L. Yue
{"title":"Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse","authors":"Q. Li, L. Na, S. Yu, O. Lehnert, A. Munneck, L. Yue","doi":"10.3176/earth.2023.13","DOIUrl":"https://doi.org/10.3176/earth.2023.13","url":null,"abstract":"","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"5 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87900321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Echinoderm Lagerstätten from high-latitude Gondwana – filling the gap in the Ordovician diversification of the phylum 来自高纬度冈瓦纳的棘皮动物Lagerstätten——填补了奥陶纪门多样化的空白
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.45
M. Nohejlová, C. Dupichaud, B. Lefebvre, E. Nardin, F. Saleh
{"title":"Echinoderm Lagerstätten from high-latitude Gondwana – filling the gap in the Ordovician diversification of the phylum","authors":"M. Nohejlová, C. Dupichaud, B. Lefebvre, E. Nardin, F. Saleh","doi":"10.3176/earth.2023.45","DOIUrl":"https://doi.org/10.3176/earth.2023.45","url":null,"abstract":"","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"11 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87690059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Middle–Late Ordovician organic- walled phytoplankton from Sweden: diversity and early radiation 瑞典中晚奥陶世有机壁浮游植物:多样性与早期辐射
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.42
C. V. Rubinstein, V. Vajda
{"title":"Middle–Late Ordovician organic- walled phytoplankton from Sweden: diversity and early radiation","authors":"C. V. Rubinstein, V. Vajda","doi":"10.3176/earth.2023.42","DOIUrl":"https://doi.org/10.3176/earth.2023.42","url":null,"abstract":"The Borenshult-1 core, drilled in the vicinity of Motala, east of Lake Vättern in south central Sweden, comprises a well-dated and nearly complete succession of marine marly carbonates deposited relatively close to land. The 34 core samples analyzed for palynology encompass the upper part of the Darriwilian (Furudal Limestone), the entire Sandbian (Dalby Limestone, the Kinnekulle K-bentonite and the lower Skagen Limestone) and the lower part of the Katian (Skagen Limestone). The age of this interval is well-constrained to the late Darriwilian (Stage slice Dw3)– early Katian (Stage slice Ka1 ) , based on conodonts and 206Pb/238U dating of volcanic ash deposits. The samples yielded predominantly marine organic-walled phytoplankton, mainly acritarchs, with subordinate chitinozoans, scolecodonts and fragments of graptolites. Sparse terrestrial palynomorphs, represented by cryptospores and trilete spores, were also found in 23 of the samples. A total of 154 acritarch species corresponding to 53 genera were identified, as well as low percentages of abnormal forms ( teratological forms) of acritarch species at some levels. The strati graphic distribution of genera and species allowed for three palynological assemblages to be distinguished: Assemblage A of a late Darriwilian age, Assemblage B of a Sandbian age ( further subdivided into sub-assemblages B1 and B2 ) , and Assemblage C dated as Katian.","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"67 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90830188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
On future directions of Ordovician chitinozoan research 奥陶系几丁质动物研究的未来方向
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.34
Y. Liang, O. Hints, J. Nõlvak, P. Tang
{"title":"On future directions of Ordovician chitinozoan research","authors":"Y. Liang, O. Hints, J. Nõlvak, P. Tang","doi":"10.3176/earth.2023.34","DOIUrl":"https://doi.org/10.3176/earth.2023.34","url":null,"abstract":"","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"51 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79327679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Advances in the Lower Ordovician of the western Iberian Chain, NE Spain 西班牙东北部西伊比利亚链下奥陶统的进展
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.15
J. Álvaro, Blanca Martínez-Benítez
{"title":"Advances in the Lower Ordovician of the western Iberian Chain, NE Spain","authors":"J. Álvaro, Blanca Martínez-Benítez","doi":"10.3176/earth.2023.15","DOIUrl":"https://doi.org/10.3176/earth.2023.15","url":null,"abstract":"The western Iberian Chain of NE Spain represents a lateral prolongation of the West AsturianLeonese Zone. As other proximal sectors fringing NW Gondwana, the chain comprises a con formable and continuous Furongian‒Tremadocian transition, comprising a thick (3600‒4500 m) Lower Ordovician sedimentary succession, exclusively composed of siliciclastic strata and deposited in mid-latitude (temperate) waters. Although the shelly fossil record is not abun dant, some key trilobites and brachiopods allow the identification of distinct biogeographic links with the Argentinian margin of West Gondwana, Oaxaca (Mexico), and the neighbouring Montagne Noire (France), with which a common biostratigraphic biozonation can be en vis aged. Two phosphoritic interbeds rich in linguliformean brachiopods punctuate the Valconchán and Borrachón formations, and represent event beds related to condensation processes and sedimentation of explosive ignimbritic tuffs, respectively.","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"70 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79969883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Siphonotretoid brachiopods – a thorny problem 管状臂足类——一个棘手的问题
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.02
L. Holmer, L. Popov, M. G. Pour, Y. Liang, Z. Zhang
{"title":"Siphonotretoid brachiopods – a thorny problem","authors":"L. Holmer, L. Popov, M. G. Pour, Y. Liang, Z. Zhang","doi":"10.3176/earth.2023.02","DOIUrl":"https://doi.org/10.3176/earth.2023.02","url":null,"abstract":"Received 21 March 2023 Accepted 30 March 2023 Available online 8 June 2023","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"46 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91341366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
A remarkable new halichondrid demosponge, Ptilospongia hemisphaeroidalis, from the latest Ordovician Beigong Biota, South China 中国南方奥陶系北宫生物群最新发现的一种显著的半海绵体
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.76
L. Li, J. Reitner
{"title":"A remarkable new halichondrid demosponge, Ptilospongia hemisphaeroidalis, from the latest Ordovician Beigong Biota, South China","authors":"L. Li, J. Reitner","doi":"10.3176/earth.2023.76","DOIUrl":"https://doi.org/10.3176/earth.2023.76","url":null,"abstract":"","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"43 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74010254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Tectonic, foreland-basin origins of Upper Ordovician black gas shales in the Appalachian Basin of eastern United States 美国东部阿巴拉契亚盆地上奥陶统黑色页岩的构造、前陆-盆地成因
IF 1.1 4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.64
F. Ettensohn, G. Martins
{"title":"Tectonic, foreland-basin origins of Upper Ordovician black gas shales in the Appalachian Basin of eastern United States","authors":"F. Ettensohn, G. Martins","doi":"10.3176/earth.2023.64","DOIUrl":"https://doi.org/10.3176/earth.2023.64","url":null,"abstract":"Black gas shales are major parts of many foreland-basin sequences and comprise important components of unconformity-bound tectophase cycles, which reflect sedimentary/stratigraphic, flexural responses to deformational loading and relaxation in an orogen. Using as examples Upper Ordovician black gas shales, deposited during the Taconian orogeny in the Appalachian Basin of the eastern United States, black-shale origins and their importance in understanding the tectonic framework are discussed. Foreland-basin black shales are clearly the product of distinctive tectonic frameworks and histories, and aside from economic value, may provide important controls on the timing and location of tectonic events.","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"33 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90595369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
Variations in wind velocity components and average air flow properties at Estonian coastal stations in 1966–2021; Sõrve Peninsula case study 1966-2021年爱沙尼亚沿海站风速分量和平均气流特性的变化Sõrve半岛案例研究
4区 地球科学
Estonian Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.3176/earth.2023.85
Ü Suursaar
{"title":"Variations in wind velocity components and average air flow properties at Estonian coastal stations in 1966–2021; Sõrve Peninsula case study","authors":"Ü Suursaar","doi":"10.3176/earth.2023.85","DOIUrl":"https://doi.org/10.3176/earth.2023.85","url":null,"abstract":"","PeriodicalId":50498,"journal":{"name":"Estonian Journal of Earth Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135104314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0
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