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  • Usage in publication:
    • Beemerville Nepheline Syenite
  • Modifications:
    • Named
  • Dominant lithology:
    • Syenite
  • AAPG geologic province:
    • Appalachian basin
Publication:

Justus, P.S., 1972, Mineralogy-petrology trip to northwestern New Jersey, IN Trip 4: National Association of Geology Teachers, Eastern Section, Field Trip Guidebook, p. 1-25.


Summary:

Intrusive complex with lamprophyre dikes and volcanic breccia pipes in northwest NJ here named Beemerville Nepheline Syenite. Intrudes Martinsburg Formation. Age is Late Ordovician (435+/-20 Ma) according to Zartman and others (1967: Amer J. Sci, v. 265).

Source: GNU records (USGS DDS-6; Reston GNULEX).


  • Usage in publication:
    • Beemerville Intrusive Suite*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Drake, A.A., Jr., and Monteverde, D.H., 1992, Bedrock geologic map of the Branchville quadrangle, Sussex County, New Jersey: U.S. Geological Survey Geologic Quadrangle Map, GQ-1700, 1 sheet, scale 1:24,000


Summary:

Beemerville rocks occur in stocks, plugs, dikes, and sills cutting the Martinsburg Formation, Beekmantown Group, and Allentown Dolomite. Age is Late Ordovician.

Source: GNU records (USGS DDS-6; Reston GNULEX).


  • Usage in publication:
    • Beemerville Intrusive Suite*
  • Modifications:
    • Age modified
    • Geochronologic dating
  • AAPG geologic province:
    • Appalachian basin
Publication:

Volkert, R.A., Puffer, J.H., and Drake, A.A., Jr., 1995, Late Proterozoic diabase dikes of the New Jersey Highlands; a remnant of Iapetan rifting in the north-central Appalachians, IN Geologic studies in New Jersey and eastern Pennsylvania: U.S. Geological Survey Professional Paper, 1565-A, p. A1-A21.


Summary:

Radiometric age of 435+/-20 Ma was obtained by Rb-Sr and K-Ar methods on biotite from nepheline syenite at Beemerville, NJ (Zartman and others, 1967). Milton, (written commun. to F.J. Markewicz, 1972) obtained K-Ar whole-rock age of 422+/-14 Ma from a minette dike in Sussex Co., NJ, and Eby and others (1992) obtained a fission-track date on titanite from nepheline syenite at Beemerville of 422+/-14 Ma. All of these determinations are in relatively good agreement and suggest a Late Ordovician to Early Silurian age for nepheline normative lamprophyre dikes and related rocks of Beemerville Intrusive Suite.

Source: GNU records (USGS DDS-6; Reston GNULEX).


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