|Geologic age||Early Silurian? and Late Ordovician|
Igneous > Plutonic > Foidal-syenitic > Nepheline-syeniteMedium- to dark-gray, medium- to coarse-grained, alkalic to alkalic-calcic nepheline syenite. Composed principally of nepheline, orthoclase, biotite, and clinopyroxene, and accessory minerals are magnetite, apatite, titanite, zircon, and pyrite.
|Comments||Beemerville 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.|
Dalton, R.F., Herman, G.C., Monteverde, D.H., Pristas, R.S., Sugarman, P.J., and 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), scale 1:100,000.
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, 4 cross sections, 2 sheets, size 56x40; 58x41, scale 1:100.000.
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.
Zartman, R.E., Brock, M.R., Heyl, A.V., and Thomas, H.H., 1967, K-Ar and Rb-Sr ages of some alkalic intrusive rocks from central and eastern United States: American Journal Science, v. 265, no. 10, p. 848-870.
Eby, G.N., Sclar, C.B., and Myers, P.B., 1992, A fission-track date on magmatic titanite from the Beemerville nepheline syenite, Sussex County, N.J.: Geological Society of America Abstracts with Programs, v. 24, no. 3, p. 18.