|Geologic age||Middle Proterozoic|
Igneous > Plutonic > Granitic > GranitePinkish-gray- to medium-buff-weathering, pinkish-white or light-pinkish-gray, medium- to coarse-grained, gneissoid to indistinctly foliated granite and sparse granite gneiss composed principally of microcline microperthite, quartz, oligoclase, and hornblende.
Metamorphic > GneissPinkish-gray- to medium-buff-weathering, pinkish-white or light-pinkish-gray, medium- to coarse-grained, gneissoid to indistinctly foliated granite and sparse granite gneiss composed principally of microcline microperthite, quartz, oligoclase, and hornblende.
Igneous > Plutonic > Syenitic > Quartz-monzonite
Igneous > Plutonic > Syenitic > Quartz-syenite
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite
Metamorphic > Amphibolite
|Comments||Byram Intrusive Suite (Middle Proterozoic) (Drake, 1984)|
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., 1984, The Reading Prong of New Jersey and eastern Pennsylvania; an appraisal of the rock relations and chemistry of a major Proterozoic terrane in the Appalachians, in Bartholomew, M.J., ed., The Grenville event in the Appalachians and related topics: Geological Society of America Special Paper 194, p. 75-109.
Drake, A.A., Jr., Aleinikoff, J.N., and Volkert, R.A., 1991b, The Byram Intrusive Suite of the Reading Prong; age and tectonic environment, in Drake, A.A., Jr., ed., Contributions to New Jersey geology: U.S. Geological Survey Bulletin 1952, p. D1-D14.
|Counties||Bergen - Hunterdon - Morris - Passaic - Somerset - Sussex - Warren|