|Latitude & Longitude (WGS84):||40° 48' 2'' North , 74° 19' 38'' West|
|Latitude & Longitude (decimal):||40.80056,-74.32722|
|Köppen climate type:||Cfa : Humid subtropical climate|
An area near Riker Hill in Livingston, NJ. Excavations for new construction circa 1970 revealed mineralized zones in the basalt containing prehnite, calcite and some other associated zeolite/traprock minerals.
2 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
174.1 - 201.3 Ma
|Hook Mt. Basalt|
Age: Early Jurassic (174.1 - 201.3 Ma)
Stratigraphic Name: Hook Mt. Basalt
Description: (Olsen, 1980) - Light- to dark-greenish-gray, medium- to coarse-grained, amygdaloidal basalt composed of plagioclase (typically An65 and commonly porphyritic), clinopyroxene (augite and pigeonite), and iron-titanium oxides such as magnetite and ilmenite. Locally contains small spherical to tubular cavities (gas-escape vesicles), some filled by zeolite minerals or calcite. Consists of two major flows. Base of lowest flow is intensely vesicular. Tops of flows are weathered and vesicular. Maximum thickness is about 110 m (360 ft) (Olsen and others, 1989).
Comments: Newark Supergroup, Brunswick Group (Lyttle and Epstein, 1987).
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
201.3 - 252.17 Ma
|Mesozoic intrusive rocks|
Age: Triassic (201.3 - 252.17 Ma)
Comments: Newark Graben System; Newark-Delaware Basin
Lithology: Intrusive igneous rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.