Palaeoecology and sedimentology of Carboniferous glacial and post-glacial successions in the Paganzo and Río Blanco basins of northwestern Argentina

Author:

Dineen A. A.1,Fraiser M. L.1,Isbell J. L.1

Affiliation:

1. Department of Geosciences, University of Wisconsin – Milwaukee, Milwaukee, WI 53201, USA

Abstract

AbstractRecent studies show that Late Palaeozoic Ice Age (LPIA) climate change broadly affected marine invertebrate faunas: glaciations decreased origination and extinction and long-term gradual global warming during the final deglaciation altered palaeocommunity composition. Carboniferous stratigraphy and palaeoecology in the Paganzo and Río Blanco basins of southwestern Gondwana (present-day Argentina) were studied in ordered to further determine how palaeocommunities were influenced by glacial and post-glacial processes during the LPIA. In the Paganzo Basin, the Guandacol Formation consisted of an ice-proximal to very ice-distal glaciomarine succession, while the Tupe Formation represented continental fluvial lowstand sedimentation interrupted by periodic marine incursions (estuary setting). In the Río Blanco Basin, the Río del Peñon Formation represents a shallowing-upwards coastal marine facies under the influence of wave and storm activity. Diversity and abundance data from northwestern Argentina reflects that ice-proximal environments proved physiologically stressful to organisms, limiting colonization to only opportunistic fauna. Following glaciation, the fauna of northwestern Argentina diversified and became increasingly ecologically complex during two marine transgressions in the Río Blanco Basin. It is interpreted that palaeocommunity establishment, composition and diversification in western Argentina during the LPIA was mostly dependent upon localized environmental conditions and palaeogeographic location.

Publisher

Geological Society of London

Subject

Geology,Ocean Engineering,Water Science and Technology

Reference135 articles.

1. Archangelsky A. Azcuy C. L. González C. R. Sabattini N. Aceñolaza G. (1987) in El Sistema Carbonífero en la República Argentina, Paleontologia, Biostratigrafia y Paleoecologia de las Cuencas Paganzo, Calingasta-Uspallata y Río Blanco, ed Archangelsky A. (Academia Nacional de Ciencias, Córdoba), pp 133–151.

2. New strophalosiidae (Brachiopoda) from the early permian of Argentina;Archbold;Proceedings of the Royal Society of Victoria,2001

3. Marine black shales: depositional mechanisms and environments of ancient deposits;Arthur;Annual Review of Earth Planetary Sciences,1994

4. Ironstone concretions – analogs to martian hematite spherules;Aubrey;Lunar and Planetary Science Conference,2007

5. Bioestratigrafía del Paleozoico Superior de América del Sur: Primera Etapa de Trabajo Hacia una Nueva Propuesta Cronoestratigráfica;Azcuy;Asociación Geológica Argentina Serie D: Publicación especial,2007

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3