State by State

New Jersey

  • Specimen Number


  • Description

    Rounded boulder of massive, brown, resistant sandstone.  Verified by state survey.

  • Classification

    Sedimentary. Sandstone. Arkose.

  • Location & Occurrence

    Staff says likely from the "red beds that occupy a northeast/southwest trend across central and northeastern New Jersey," part of the Newark Supergroup, rift-basin.

  • Geologic Age

    Triassic.  There are no other rocks so  undeformed that would qualify, though this seems unusually well cemented.

  • Geoheritage

    Newark Group associated with breakup of Pangea and correlated with rocks from Georgia to Newfoundland, including the Connecticut specimen stone (#6).

  • Links

    Link to State Geological Map from USGS.  Link to Division of Water Supply and Geoscience .

  • Other

    Specimen seems much harder and more cemented than the Newark Rocks from Connecticut. But the color and texture is otherwise identical.

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Specimen stone for New Jersey.
New jersey closeup. Outline of New Jersey. Geo Map of New Jersey.