State by State

North Carolina

  • Specimen Number


  • Description

    Block (joint face) of well-bedded mud rock (pelitic), either a hard siltstone or coarse shale.  Beautifully stained on partings on joint face with oxide blotches and minor concretions. Bedding is in the other orientation, parallel to the line of the wall. It lacks the fissility of shale and the massiveness of most mudstone.

  • Classification

    Sedimentary. Mudstone.

  • Location & Occurrence


  • Geologic Age


  • Geoheritage

    This is the most challenging identification.  There has to be one for every collection.

  • Links

    Link to State Geological Map from USGS.  Link to North Carolina Department of Environmental Quality .

  • Other

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Specimen stone for North Carolina.
Closeup of North Carolina Outline of North Carolina Geo Map of North Carolina