State by State


  • Specimen Number


  • Description

    Broken slab. View of bedding plane or original depositional surface, a.k.a. the former sea floor. Hash of fossil fragments including many brachiopods in closeup. Identified by survey staff as fossil "snails Paupispira (Loxoplocus) and Lophospira, and possibly the fossil brachiopod Hebertella, and maybe some Rafinesquina fragments."

  • Classification

    Sedimentary. Limestone. Biomicrite.  Shell hash.

  • Location & Occurrence

    Fossils like this occur in many formations, but this one is most likely from the Grant Lake or Bull Fork Formations in the north-central part of the state in Oldham and Trimble Counties.

  • Geologic Age

    Ordovician. Predates the End-Ordovician mass extinction.

  • Geoheritage

    Recognizable taxa can be identified, even if millions, if not billions of years old.  Most of these became extinct during one of Earth's six major mass extinctions, the end-Ordovician.

  • Links

    Link to State Geological Map from USGS.  Link to Kentucky Geological Survey .  USGS Description of Grant Lake Formation.

  • Other

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Specimen stone for Kentucky.
Alt Text for Image Here Outine of Kentucky. Geo Map of Kentucky.