Latitude: 40°28'N
Longitude: 74°43'W
An occurrence in traprock. Sourland Mountain continues into Mercer County.
Although the map icon for this occurrence is near its northeastern end, Sourland Mountain extends southwestward for many miles. Near the Delaware River, in the vicinity of Lambertville, NJ the ridge is known as "Goat Hill" and its extention into Pennsylvania is known as "Solebury Mountain."
Sourland Mountain is more famous as the site of the Lindbergh baby's murder in 1932, than it is for minerals. The ridge known as Sourland Mountain is underlain by a diabase intrusion into the upper part of the Lockatong Formation, known as the Lambertville Sill. It is a faulted segment of the western extention of the Palisades intrusive. A quarry, formerly operated by the 3M Corp. for roofing granules and currently by Gibraltar Rock of Belle Mead for crushed stone aggregate, is the only major exposure of either the diabase or the associated hornfels in the entire extent of the Sourland Mountain ridge.
References
The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 5, No. 1, Manchester, J.G. (1931): 92.
[See entry for 3M Quarry, Hillsborough Township]
Mineral List
5 entries listed. 2 valid minerals.
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