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在南极洲的白时期,岩石占主导地位

Daniel Sedorko^1,2, Carolina Gutiérrez³, Pablo J Pazos³

¹Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Geologia e Paleontologia, Campus de Pesquisa e Ensino, Avenida Bartolomeu de Gusmão, 875, São Cristóvão, 20941-160 Rio de Janeiro, RJ, Brazil.

Anais da Academia Brasileira de Ciencias

|December 19, 2024

概括

这项研究分析了来自南极洲的痕迹化石.

科学领域:

古生物学的古生物学
沉积物学的沉积物学
在平流图学上,平流图学是平流图学.

背景情况:

痕迹化石提供了对古代环境和生物行为的洞察.
散布的痕迹化石表明了特定的养策略和沉积条件.

研究的目的:

为了研究以石化石为主导的 ichnoassemblages.
为了确定上白纪雪山岛形成的沉积环境和古老环境条件.
解释这些痕迹化石的 ichnofacies 和生态意义.

主要方法:

对 ichnoassemblages 的系统描述和分析.
沉积物继承的平层记录记录.
岩层分析和沉积环境的解释.

主要成果:

蔓延结构 (Paradictyodora antarctica,Euflabella) 的占主导地位表明沉积物养活动.
欧夫拉贝拉在上层的流行率表明,它们适应了可变的粮食资源,并发挥了巨性通用主义的作用.
鱼类动物的特征挑战了明确的 Phycosiphon 或 Rosselia 鱼类动物的分配,有证据表明在上层有淡水的影响.
较高的鱼差异性和蔓延洞穴支持将其归因于Cruziana ichnofacies.

结论:

鱼类组合归因于克鲁西亚纳鱼类.
沉积环境被解释为具有波动能量条件的三角形.
痕迹化石分布提供了适应策略和古环境变化的证据.

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