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Clastos con calcimicrobios y arqueociatos procedentes de depósitos marinos del talud de la Formación cámbrica del Monte Wegener, Coats Land, Cordillera de Shackleton Antártida 南极洲沙克尔顿山脉科茨地韦格纳山寒武纪斜坡海洋沉积物中含有钙微生物和古菌的碎屑
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-12-10 DOI: 10.3989/egeol.43586.567
M. Rodríguez-Martínez, A. Perejón, E. Moreno-Eiris, S. Menéndez, W. Buggisch
{"title":"Clastos con calcimicrobios y arqueociatos procedentes de depósitos marinos del talud de la Formación cámbrica del Monte Wegener, Coats Land, Cordillera de Shackleton Antártida","authors":"M. Rodríguez-Martínez, A. Perejón, E. Moreno-Eiris, S. Menéndez, W. Buggisch","doi":"10.3989/egeol.43586.567","DOIUrl":"https://doi.org/10.3989/egeol.43586.567","url":null,"abstract":"The carbonate clasts from the Mount Wegener Formation provide sedimentological, diagenetic and palaeontological evidences of the destruction and resedimentation of a hidden/unknown Cambrian carbonate shallow-water record at the Coats Land region of Antarctica. This incomplete mosaic could play a key role in comparisons and biostratigraphic correlations between the Cambrian record of the Transantarctic Mountains, Ellsworth-Whitmore block and Antarctic Peninsula at the Antarctica continent. Moreover, it represents a key record in future palaeobiogeographic reconstructions of South Gondwana based on archaeocyathan assemblages.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"24 1","pages":"112"},"PeriodicalIF":0.7,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81881883","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
Guía de campo post-congreso, 21-24 de Octubre de 2019: Ediacárico y Terreneuviense en los alrededores del Geoparque de la UNESCO Villuercas-Ibores-Jara 2019年10月21日至24日，会后实地指南:联合国教科文组织维卢埃卡斯-伊博雷斯-哈拉地质公园周围的edicarico和Terreneuviense
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-12-02 DOI: 10.3989/egeol.43726.576
J. Álvaro, S. Jensen, T. Palacios
{"title":"Guía de campo post-congreso, 21-24 de Octubre de 2019: Ediacárico y Terreneuviense en los alrededores del Geoparque de la UNESCO Villuercas-Ibores-Jara","authors":"J. Álvaro, S. Jensen, T. Palacios","doi":"10.3989/egeol.43726.576","DOIUrl":"https://doi.org/10.3989/egeol.43726.576","url":null,"abstract":"One of the corners of the geographical maps that link the provinces of Badajoz, Caceres and Toledo contains some key outcrops necessary to understand the Ediacaran-Cambrian transition in the Central-Iberian Zone. In the cores of the Extremenian Anticlinorium and the Ibor and Valdelacasa anticlines, the Lower Alcudian-Domo Extremeno Supergroup (including the diamictites of the Orellana Formation), the most spectacular microbial reefs with Cloudina of the Villarta Formation, and the palaeoichnological base of the Cambrian in the Arrocampo Formation (both the Villarta and Arrocampo formations belong to the Ibor Group) stand out. The exposures that were traditionally considered as representatives of the Precambrian-Cambrian boundary and base of the Cordubian regional Stage are located in the lower member of the Pusa Formation, unconformably overlying the Ibor Group, and are considered at present as intra-Terreneuvian in age.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"29 3 1","pages":"121"},"PeriodicalIF":0.7,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81056006","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: 1
Bioestratigrafía a partir de trilobites de las Formaciones de Balang y “Tsinghsutung” (Serie Cámbrica 2, Piso 4) en el área de Balang, Jianhe, Guizhou, China meridional 中国南方贵州建河巴朗地区巴朗和“青素东”组(寒武纪系列2,4层)三叶虫的生物地层学
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-12-02 DOI: 10.3989/egeol.43595.574
Y. Zhao, S. Peng, J. Yuan, J. Esteve, X. Yang, M. Wu, Z. Chen
{"title":"Bioestratigrafía a partir de trilobites de las Formaciones de Balang y “Tsinghsutung” (Serie Cámbrica 2, Piso 4) en el área de Balang, Jianhe, Guizhou, China meridional","authors":"Y. Zhao, S. Peng, J. Yuan, J. Esteve, X. Yang, M. Wu, Z. Chen","doi":"10.3989/egeol.43595.574","DOIUrl":"https://doi.org/10.3989/egeol.43595.574","url":null,"abstract":"Ongoing work is carrying out in the Balang and “Tsinghsutung” formations to aim a suitable candidate for the base of the Cambrian Series 2, Stage 4. The revision of the trilobite systematics and zonation shed light about the stratigraphic distribution and the geographical distribution of the new trilobite-based zones in the Balang area (South China). Our results suggest that either Oryctocarella duyunensis or Arthricocephalus chauveaui could be good candidates since they also occur in the Eoaagnostus roddyi-Arthricocephalus chauveaui Zone of the Henson Gletscher Formation, North Greenland.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"48 1","pages":"119"},"PeriodicalIF":0.7,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81455402","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: 4
Calibrando la transición ediacárico-cámbrica en Gondwana suddoccidental 冈瓦纳西南地区第三纪-寒武纪过渡的校准
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-12-02 DOI: 10.3989/egeol.43593.573
L. Warren, E. Tohver, L. Inglez, J. Okubo, C. Riccomini, S. Xiao
{"title":"Calibrando la transición ediacárico-cámbrica en Gondwana suddoccidental","authors":"L. Warren, E. Tohver, L. Inglez, J. Okubo, C. Riccomini, S. Xiao","doi":"10.3989/egeol.43593.573","DOIUrl":"https://doi.org/10.3989/egeol.43593.573","url":null,"abstract":"The paleontological, isotopic and geochronological data summarized below support the paleogeographic and temporal correlation between Itapucumi (Paraguay) and Corumba (Brazil) groups, suggesting a coeval sedimentary evolution of these units in the margins of the Amazon Craton and the Rio Apa Block.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"39 1","pages":"118"},"PeriodicalIF":0.7,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85791854","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
Guía de campo pre-congreso, 17-18 de Octubre de 2019: Ediacárico, Paleozoico Inferior y panorámicas en el Geoparque de la UNESCO Villuercas-Ibores-Jara 2019年10月17日至18日，会前实地指南:联合国教科文组织Villuercas-Ibores-Jara地质公园的埃迪卡拉纪、下古生代和全景
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-12-02 DOI: 10.3989/egeol.43725.575
S. Jensen, J. Álvaro, T. Palacios
{"title":"Guía de campo pre-congreso, 17-18 de Octubre de 2019: Ediacárico, Paleozoico Inferior y panorámicas en el Geoparque de la UNESCO Villuercas-Ibores-Jara","authors":"S. Jensen, J. Álvaro, T. Palacios","doi":"10.3989/egeol.43725.575","DOIUrl":"https://doi.org/10.3989/egeol.43725.575","url":null,"abstract":"Several stratigraphic units characteristic of the Ediacaran-Cambrian transition between Guadalupe and Castanar de Ibor, north of the Villuercas-Ibores-Jara Geopark (Caceres), are described and illustrated here. The outcrops of (i) the Castanar and Villarta formations (Ibor Group, terminal Ediacaran and Terreneuvian), together with their content in vendotaenids, sabelliditids and microbial reefs with Cloudina ; and (ii) the San Lorenzo Formation (Terreneuvian) and its palaeoichnological content, are detailed. Finally, the palaeoichnological record of the Armorican Quartzite (Lower Ordovician), mainly of Cruziana and Daedalus , which characterize some sites of geological interest (geosites) in the Geopark, are highlighted.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"1 1","pages":"120"},"PeriodicalIF":0.7,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75766483","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: 2
Ecología de Dickinsonia en llanuras mareales 潮汐平原上的狄更斯索尼亚生态学
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-11-28 DOI: 10.3989/egeol.43587.571
N. G. Sozonov, N. I. Bobkov, E. G. Mitchell, A. Kolesnikov, D. Grazhdankin
{"title":"Ecología de Dickinsonia en llanuras mareales","authors":"N. G. Sozonov, N. I. Bobkov, E. G. Mitchell, A. Kolesnikov, D. Grazhdankin","doi":"10.3989/egeol.43587.571","DOIUrl":"https://doi.org/10.3989/egeol.43587.571","url":null,"abstract":"Specimens of Dickinsonia from the Central Urals are characterised by clear bilateral symmetry. Taking into account observations from Australian specimens, we consider that the so called ‘glide reflection symmetry’ in these fossils is a taphonomic phenomenon. The size frequency distribution plot shows the predominance of smaller individuals in the studied population of Dickinsonia from the Central Urals. Assuming that the age of an individual is manifested in the body size, there is a significant predominance of juvenile individuals in the population. Three possible scenarios can be envisaged: (i) the population has a large number of juvenile individuals as the result of high survivorship rate in the intertidal zone; (ii) the population teems with juvenile forms because it is buried immediately after hatching; (iii) assuming that Dickinsonia was an actively motile organisms, that abundance of juvenile individuals could be explained by their inability to escape burial (although it is difficult to imagine that some of the mature individuals are buried with signs of escape behaviour); and (iv) the population could be interpreted as a fossilised ‘nesting ground’ for Dickinsonia in the intertidal zone where juvenile forms underwent maturation before migrating back to the subtidal zone. The study population can be characterised as expanding or stable; therefore, the intertidal setting can be described as favourable for these organisms.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"110 1","pages":"116"},"PeriodicalIF":0.7,"publicationDate":"2019-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80539042","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: 9
El Criogénico terminal, el Ediacárico y el Cámbrico temprano en la Plataforma Siberiana sudoccidental: estratotipos y limitotipos 西南西伯利亚大陆架终末低温、埃迪卡拉纪和早寒武纪:层型和边界型
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-11-28 DOI: 10.3989/egeol.43595.570
J. K. Sovetov, L. V. Solovetskaya
{"title":"El Criogénico terminal, el Ediacárico y el Cámbrico temprano en la Plataforma Siberiana sudoccidental: estratotipos y limitotipos","authors":"J. K. Sovetov, L. V. Solovetskaya","doi":"10.3989/egeol.43595.570","DOIUrl":"https://doi.org/10.3989/egeol.43595.570","url":null,"abstract":"A stratigraphic revision of the latest Cryogenian, Ediacaran and earliest Cambrian of the southwestern Siberian Platform is proposed here. All late Neoproterozoic stratigraphic units fill the Sayan foredeep. The sedimentary record is adscribed to the upper Cryogenian and Ediacaran Oselok Group and the lower Cambrian Ust’-Tagul Formation. They can be subdivided into members with a characteristic fossiliferous content ecology of Dickinsonia.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"123 1","pages":"115"},"PeriodicalIF":0.7,"publicationDate":"2019-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77039978","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: 1
Grandes hitos de la Explosión Cámbrica: asociación bentónica macrobioclástica en el Piso cámbrico inferior 2 del Olenek Uplift, Siberia ártica
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-11-27 DOI: 10.3989/egeol.43595.568
Z. Sarsembaev, V. V. Marusin
{"title":"Grandes hitos de la Explosión Cámbrica: asociación bentónica macrobioclástica en el Piso cámbrico inferior 2 del Olenek Uplift, Siberia ártica","authors":"Z. Sarsembaev, V. V. Marusin","doi":"10.3989/egeol.43595.568","DOIUrl":"https://doi.org/10.3989/egeol.43595.568","url":null,"abstract":"The basal Cambrian Stage 2 strata of the Olenek Uplift host diverse assemblages of macroscopic fossils, which closely resemble certain small skeletal taxa early reported from this section and typical for the Terreneuvian Epoch. Herein studied macroscopic assemblage includes helcionellid, stenothecid and kharkhaniid molluscs, and anabaritids and circothecid hyoliths. Among the assemblage, only anabaritids and some citrcothecid hyoliths exhibit relics of calcite shell, whereas most of the fossils reveal no evidence of rigid biomineralized exoskeleton. Hence, at least these problematic Cambrian organisms had reached macroscopic sizes (up to 35 mm long) and were covered with calcite shells at the very beginning of the Cambrian Age 2.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"15 1","pages":"113"},"PeriodicalIF":0.7,"publicationDate":"2019-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91089531","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
Revisión de la sucesión de la Sierra de la Zarzuela: último registro del Ediacárico-¿Fortuniense inferior? del Gran Anticlinorio Extremeño central, Zona Centroibérica meridional, Macizo Ibérico, España 对扎祖埃拉山脉演替的回顾:埃迪卡拉纪的最后记录-下福图尼纪?西班牙伊比利亚地块埃斯特雷马杜拉中部大背斜，伊比利亚中部南部带
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-11-22 DOI: 10.3989/egeol.43591.565
A. Pieren, M. Rodríguez-Martínez
{"title":"Revisión de la sucesión de la Sierra de la Zarzuela: último registro del Ediacárico-¿Fortuniense inferior? del Gran Anticlinorio Extremeño central, Zona Centroibérica meridional, Macizo Ibérico, España","authors":"A. Pieren, M. Rodríguez-Martínez","doi":"10.3989/egeol.43591.565","DOIUrl":"https://doi.org/10.3989/egeol.43591.565","url":null,"abstract":"In the southern Central Iberian Zone, unconformably lying on the Cadomian folded Lower Alcudian-Domo Extremeno Supergroup the most complete succession of late Ediacaran rocks crops out at the Sierra de la Zarzuela syncline. The purpose of this contribution is to study and redefine a regional lithostratigraphic framework for the \u0000“Upper Alcudian” rocks of this area related to the Ibor Group.","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"10 1","pages":"110"},"PeriodicalIF":0.7,"publicationDate":"2019-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75136951","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
Caracterización quimioestratigráfica y facies carbonatadas de una plataforma ediacárica, Formación de Tamengo, Grupo de Corumbá: resultados preliminares corumba组Tamengo组埃迪卡拉台地的化学地层特征和碳酸盐岩相:初步结果
IF 0.7 4区 地球科学
Estudios Geologicos-Madrid Pub Date : 2019-11-22 DOI: 10.3989/egeol.43589.566
M. Ramos, M. Giorgioni, D. D. Do Carmo, D. Walde, E. Guimarães, G. Fazio, L. C. Vieira, M. Denezine, R. Santos, R. Adôrno
{"title":"Caracterización quimioestratigráfica y facies carbonatadas de una plataforma ediacárica, Formación de Tamengo, Grupo de Corumbá: resultados preliminares","authors":"M. Ramos, M. Giorgioni, D. D. Do Carmo, D. Walde, E. Guimarães, G. Fazio, L. C. Vieira, M. Denezine, R. Santos, R. Adôrno","doi":"10.3989/egeol.43589.566","DOIUrl":"https://doi.org/10.3989/egeol.43589.566","url":null,"abstract":"This study presents updates and upgrades concerning the stable isotopic register of the Tamengo Formation, upper part of the Corumba Group, which crops out in the meridional portion of the Paraguay Belt. This work includes detailed stratigraphic sections paired with high-resolution δ 13 C and δ 18 O geochemistry from two mining sites near Corumba (Mato Grosso do Sul, Brazil).","PeriodicalId":50496,"journal":{"name":"Estudios Geologicos-Madrid","volume":"32 4 1","pages":"111"},"PeriodicalIF":0.7,"publicationDate":"2019-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74061317","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: 1
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