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September 16, 2025Stratigraphy

Calcareous nannofossil biostratigraphy and floral response to environmental changes recorded in the Pliocene Yorktown Formation, southeastern Virginia, USA

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Authors

MUMasayuki UtsunomiyaUnited States Geological SurveyHDHarry J. DowsettUnited States Geological Survey

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Overview

Analysis of nannofossil assemblages reveals environmental shifts in the Yorktown Formation, indicating significant climatic events.

Key Points

  • The study identifies key nannofossil species and their last occurrences, helping establish a timeline of climate change.
  • Analysis reveals a sharp decline in cold-water species associated with rising sea surface temperatures near the Morgarts Beach Member.
  • Sediment samples indicate that the Yorktown Formation contains distinct members, important for paleoenvironmental reconstructions.
  • Linking nannofossil data with sea surface temperature estimates aids in refining the chronology of the Pliocene.

Cite This Study

Utsunomiya et al. (2025) studied this question.

synapsesocial.com/papers/68d4508931b076d99fa58715https://doi.org/10.29041/strat.22.3.02
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