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Beemerville main nepheline-syenite mass, Libertyville, Wantage Township, Sussex Co., New Jersey, USA

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Latitude & Longitude (WGS84): 41° 13' 56'' North , 74° 41' 45'' West
Latitude & Longitude (decimal): 41.2322222222, -74.6958333333
Other regions containing this locality:North America

A nepheline-syenite mass comprised of dikes and sills plus a laccolith (?) in Martinsburg Shale. Located about 2 miles NNW of Beemersville on the SE flank of Kittatinny Mountain. This is a significant igneous body which has yet to be exploited for any purpose except specimen collecting on the outcrop.

Mineral List

20 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!


Mineralization age: Llandovery : 437 ± 22 Ma

Important note: This table is based only on rock and mineral ages recorded below and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
ⓘ Biotite437 ± 22 Ma

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


New Jersey State Geologist Annual Report (1896): 92-94.

Rutgers University, the State University of New Jersey, Bulletin No. 5, Part 1: 53-54.

Manchester, J. G. (1931), The Minerals of New York City & Its Environs, New York Mineral Club Bulletin: 3(1): 65.

Wilkerson, A.S. (1946), Nepheline Syenite from Beemerville, Sussex County, New Jersey. American Mineralogist: 31: 284-287.

Eby, G. N. (2004), Petrology, geochronology, mineralogy, and geochemistry of the Beemerville alkaline complex, northern New Jersey. In Puffer, J. H. and Volkert, R. A. (eds.) Neoproterozoic, Paleozoic, and Mesozoic Intrusive Rocks of Northern New Jersey and Southeastern New York. Twenty-First Annual Meeting Geological Association of New Jersey, Mahwah, NJ, pp. 52-68.

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