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Ouachitite breccia

Ouachitite breccia - Medium-dark-gray, fine-grained ouachitite (olivine-free biotite lamprophyre) containing pebble- to cobble-size xenoliths of Middle Proterozoic rock, dolomite of the Kittatinny Supergroup(?), the Martinsburg Formation, and autoliths of potassic syenite, lamprophyre, and carbonatite. Found in numerous diatremes in the Beemerville area; largest of at Rutan Hill.
StateNew Jersey
NameOuachitite breccia
Geologic ageEarly Silurian? and Late Ordovician
Original map labelSObb
CommentsBeemerville Intrusive Suite (Early Silurian? and Late Ordovician) (Drake and Monteverde, 1992) Note that there is a unit SObl (Lamprophyre, ect...) that is described in the digital description and is used on the printed map; but it is NOT used on the digital map. Probably because it is a line feature and the digital geology is only polygons. Unit SObl has NOT been entered here.
Primary rock typelamprophyre
Secondary rock typedolostone (dolomite)
Other rock typessyenite; intrusive carbonatite
Lithologic constituents
Major
Igneous > Hypabyssal > Lamprophyre (Volcaniclastic, volcanic breccia)Medium-dark-gray, fine-grained ouachitite (olivine-free biotite lamprophyre) containing pebble- to cobble-size xenoliths of Middle Proterozoic rock. Autoliths of lamprophyre.
Minor
Igneous > Plutonic > Intrusive-carbonatiteAutoliths of carbonatite.
Igneous > Plutonic > Syenitic > Syeniteautoliths of potassic syenite
Sedimentary > Carbonate > Dolostonecontaining pebble- to cobble-size xenoliths of dolomite of the Kittatinny Supergroup(?).
Map references
Dalton, R. F., Herman, G. C., Monteverde, D. H., Pristas, R. S., Sugarman, P. J., Volkert, R. A., 1999, New Jersey Department Of Environmental Protection, Bedrock Geology and Topographic Base Maps of New Jersey: New Jersey Geological Survey CD Series CD 00-1; ARC/INFO (v. 7.1) export file: geology.e00, scale 1:100,000, unit description files: cslegend.pdf and nlegend.pdf, metadata: metast.pdf.
Unit references
Dalton, R. F., Herman, G. C., Monteverde, D. H., Pristas, R. S., Sugarman, P. J., Volkert, R. A., 1999, New Jersey Department Of Environmental Protection, Bedrock Geology and Topographic Base Maps of New Jersey: New Jersey Geological Survey CD Series CD 00-1; ARC/INFO (v. 7.1) export file: geology.e00, scale 1:100,000, unit description files: cslegend.pdf and nlegend.pdf, metadata: metast.pdf.
Drake, Avery A. Jr.,Volkert, Richard, A., Monteverde, Donald H., Herman, Gregory C., Houghton,Hugh F., Parker, Ronald A., and Dalton, Richard F., 1996, Bedrock Geologic Map of Northern New Jersey: U.S. Geological Survey Miscellanenous Investigations Map I-2540-A, scale 1 to 100,000, 4 cross sections, 2 sheets, size 56x40; 58x41.
Drake, A.A., Jr., and Monteverde, D.H., 1992a, Bedrock geologic map of the Branchville quadrangle, Sussex County, New Jersey: U.S. Geological Survey Geologic Quadrangle Map GQ1700, scale 1:24,000.
Geographic coverageSussex

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