First documentation of Late Paleozoic conodonts from Argentina: Biostratigraphic and paleoclimatic constraints for the Late Paleozoic Ice Age in SW Gondwana

IF 4.8 1区 地球科学 Q1 GEOLOGY
Geology Pub Date : 2024-08-01 DOI:10.1130/g52133.1
Gustavo G. Voldman, Gabriela A. Cisterna, Andrea F. Sterren, Miguel Ezpeleta, James E. Barrick
{"title":"First documentation of Late Paleozoic conodonts from Argentina: Biostratigraphic and paleoclimatic constraints for the Late Paleozoic Ice Age in SW Gondwana","authors":"Gustavo G. Voldman, Gabriela A. Cisterna, Andrea F. Sterren, Miguel Ezpeleta, James E. Barrick","doi":"10.1130/g52133.1","DOIUrl":null,"url":null,"abstract":"We present the first discovery of Late Paleozoic conodonts in Argentina, marking the southernmost occurrence of this fossil group in the dominantly cold, high latitudes of Gondwana. Recovered from the siliciclastic Río del Peñón (RDP) Formation at the Rincón Blanco section in the northern Precordillera, La Rioja Province, the fossil assemblage includes Neognathodus colombiensis and Neognathodus “pre-colombiensis,” precisely indicating the early Moscovian (late Atokan in North America) N. colombiensis Zone. Furthermore, the conodont fauna establishes a crucial temporal constraint for the brachiopod Tivertonia jachalensis–Streptorhynchus inaequiornatus (TS) Zone, which is a widely employed biostratigraphic unit in southern South America. The warm-water affinity of Neognathodus is in accordance with the record of typical paleoequatorial faunal elements in the TS Zone in several central western Argentinian basins, thus reinforcing the idea of a climatic amelioration in the southern latitudes of Gondwana during the early Moscovian.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"48 1","pages":""},"PeriodicalIF":4.8000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1130/g52133.1","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

We present the first discovery of Late Paleozoic conodonts in Argentina, marking the southernmost occurrence of this fossil group in the dominantly cold, high latitudes of Gondwana. Recovered from the siliciclastic Río del Peñón (RDP) Formation at the Rincón Blanco section in the northern Precordillera, La Rioja Province, the fossil assemblage includes Neognathodus colombiensis and Neognathodus “pre-colombiensis,” precisely indicating the early Moscovian (late Atokan in North America) N. colombiensis Zone. Furthermore, the conodont fauna establishes a crucial temporal constraint for the brachiopod Tivertonia jachalensis–Streptorhynchus inaequiornatus (TS) Zone, which is a widely employed biostratigraphic unit in southern South America. The warm-water affinity of Neognathodus is in accordance with the record of typical paleoequatorial faunal elements in the TS Zone in several central western Argentinian basins, thus reinforcing the idea of a climatic amelioration in the southern latitudes of Gondwana during the early Moscovian.
阿根廷晚古生代锥齿动物的首次文献记载:冈瓦纳西南部晚古生代冰期的生物地层学和古气候制约因素
我们介绍了在阿根廷首次发现的晚古生代锥齿类化石,标志着这一化石群出现在冈瓦纳寒冷高纬度地区的最南端。该化石群从拉里奥哈省北部 Precordillera 的 Rincón Blanco 段硅质碎屑岩 Río del Peñón(RDP)地层中发现,包括 Neognathodus colombiensis 和 Neognathodus "pre-colombiensis",准确地表明了早 Moscovian(北美阿托坎晚期)N. colombiensis 区。此外,锥齿动物群还为腕足动物 Tivertonia jachalensis-Streptorhynchus inaequiornatus(TS)区建立了重要的时间约束,该区是南美洲南部广泛使用的生物地层单元。Neognathodus的暖水亲缘关系与阿根廷中西部几个盆地中TS区典型的古赤道动物元素记录相吻合,从而加强了冈瓦纳南部纬度地区在早 Moscovian时期气候改善的观点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Geology
Geology 地学-地质学
CiteScore
10.00
自引率
3.40%
发文量
228
审稿时长
6.2 months
期刊介绍: Published since 1973, Geology features rapid publication of about 23 refereed short (four-page) papers each month. Articles cover all earth-science disciplines and include new investigations and provocative topics. Professional geologists and university-level students in the earth sciences use this widely read journal to keep up with scientific research trends. The online forum section facilitates author-reader dialog. Includes color and occasional large-format illustrations on oversized loose inserts.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信