1. Mineral Resources
  2. Online Spatial Data
  3. Geology
  4. by state
  5. New Jersey

Hook Mt. Basalt

XML
JSON
Shapefile
(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).
State New Jersey
Name Hook Mt. Basalt
Geologic age Lower Jurassic
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow)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.
Comments Newark Supergroup, Brunswick Group (Lyttle and Epstein, 1987).
References

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.

https://pubs.er.usgs.gov/publication/i2540A

Olsen, P.E., 1980, The latest Triassic and Early Jurassic formations of the Newark basin (eastern North America, Newark Supergroup); stratigraphy, structure, and correlation: New Jersey Academy of Science Bulletin, v. 25, no. 2, p. 25-51.

Lyttle, P.T., and Epstein, J.B., 1987, Geologic map of the Newark 1 x 2 degree quadrangle, New Jersey, Pennsylvania, and New York: U.S. Geological Survey Miscellaneous Investigations Series Map I-1715, scale 1:250,00.

https://pubs.er.usgs.gov/publication/i1715

Olsen, P.E., Schlische, R.W., and Gore, P.J.W., eds., 1989, Sedimentation and basin analysis in siliciclastic rock sequences; volume 2, tectonic, depositional, and paleoecological history of the early Mesozoic rift basins, eastern North America: Washington, D.C., American Geophysical Union, 28th International Geological Congress, Field Trip Guidebook T351, 174 p.
NGMDB product
Counties Essex - Morris - Passaic - Somerset