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Mollusks of the Late Pleistocene oolitic facies of the Miami Limestone in the Miami Dade County, South Florida.

机译:迈阿密石灰岩的晚更新世橄榄岩的软体动物在南佛罗里达的迈阿密戴德县。

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摘要

The oolitic limestone that makes up the bedrock of Miami-Dade and parts of Broward County, Florida, is a relatively well studied formation, with poorly studied fossil content. No published systematic record of Pleistocene fossils in the Miami Limestone is available. Besides the basic knowledge of taxonomy and biodiversity of the mollusks, comparison with extant assemblages can yield important information about the biodiversity changes in southern Florida during the past ∼130,000 years. Preliminary surveys of several localities, both previously described and new, within the Dade County yielded a record of diverse mollusks from over 28 families, 34 genera and 40 species. The preliminary findings of molluscan fossils have led to a new, unstudied and unpublished fossil locality with the second discovery of a possible Strombus costatus in the Miami Limestone. Miami Limestone fossils are being compared to recent South Florida mollusks indicating patterns of local diversification and extinction related to the minor changes in sea level and disappearance of certain habitats such as the rocky shore substrates that Cittarium pica once thrived on.
机译:构成迈阿密-戴德(Miami-Dade)和佛罗里达州布罗沃德县(Broward County)部分地区的基岩的石灰质石灰岩是研究得比较充分的地层,其化石含量研究得很少。没有关于迈阿密石灰石的更新世化石化石的系统记录。除了分类学和软体动物的生物多样性的基本知识外,与现存的组合进行比较还可以提供有关佛罗里达南部地区在过去约13万年来的生物多样性变化的重要信息。在大德县内对先前描述的和新发现的几个地方进行的初步调查产生了来自28个科,34属和40个物种的各种软体动物的记录。软体动物化石的初步发现导致了新的,未经研究和未发表的化石产地,并在迈阿密石灰石中第二次发现了可能的血栓肋骨。迈阿密石灰石化石正在与近期南佛罗里达州的软体动物进行比较,这表明当地多样化和灭绝的模式与海平面的微小变化和某些生境的消失有关,例如像Cittarium pica曾经盛行的多岩石的海岸基底。

著录项

  • 作者

    D'Antonio, Heather M.;

  • 作者单位

    Florida Atlantic University.;

  • 授予单位 Florida Atlantic University.;
  • 学科 Geology.;Paleoecology.;Paleontology.
  • 学位 M.S.
  • 年度 2012
  • 页码 113 p.
  • 总页数 113
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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