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National Geologic Map Database
Geologic Unit: Palisade
Map showing publication footprint
  • Usage in publication:
    • Palisade trap
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Diabase
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
    • Newark basin
Publication:

Darton, N.H., 1889, On the great lava flows and intrusive trap sheets of the Newark system in New Jersey: American Journal of Science, 3rd series, v. 38, p. 134-139.


Summary:

Palisade trap. An intrusive diabase sheet and dike structure. Best exposed instance of intrusion on large scale in New Jersey. In greater part an essentially conformable sheet throughout. Exposed for 30 miles along west side of Hudson River in contact with underlying strata. Intrudes Newark sedimentary rocks. Age is Jurassic. [In USGS Bull. 67, 1890, Darton gave thickness 30 to 850 feet.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1591); supplemental information from GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Palisade diabase
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
    • Newark basin

Map showing publication footprint
  • Usage in publication:
    • Palisade diabase*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
    • Newark basin
Publication:

Darton, N.H., 1902, Juratrias rocks, IN Merrill, F.J.H., and others, New York City folio; Paterson, Harlem, Staten Island, and Brooklyn quadrangles, New York-New Jersey: U.S. Geological Survey Geologic Atlas of the United States Folio, GF-83, p. 6-10, scale 1:62,500


Summary:

Palisade diabase. A great sheet of igneous rock intruded among the lower sandstones and shales of Newark group, forms the Palisades of the Hudson.
[GNC remark (ca. 1936, US geologic names lexicon, USGS Bull. 896, p. 1591): The USGS treats this intrusive formation as distinct from Newark group. That group, however, includes some interbedded basalt flows.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1591).


Map showing publication footprint
  • Usage in publication:
    • Palisade Diabase*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
    • Newark basin
Publication:

Ratcliffe, N.M., 1982, Results of core drilling of the Ramapo Fault at Sky Meadow Road, Rockland County, New York, and assessment of evidence for reactivation to produce current seismicity: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1401, 1 sheet.


Summary:

Age changed from Late Triassic to Early Jurassic based on 40Ar/39Ar incremental release ages by Dallmeyer (1975, Geology, v. 3, no. 5, p. 243-245).

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Palisades sill
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
    • Newark basin
Publication:

Klewsaat, D.R., and Gates, A.E., 1994, Faulting, fragmentation, and Cretaceous breaching of the Palisades sill, New Jersey: Northeastern Geology, v. 16, nos. 3-4, p. 237-250.


Summary:

Palisades sill forms conspicuous ridge that lies along the eastern margin of the Mesozoic Newark basin from Staten Island to Rockland Co., NY, where it intruded sedimentary rocks of the basin. Southern margin extends beneath the Cretaceous sediments of the Atlantic Coastal Plain near Carteret, NJ. The Rocky Hill diabase lies 30 km southwest along strike of the Palisades. A gravity survey and well log analysis show that these two sills are continuous and can be considered a single unit and that the buried portion of the Palisades is faulted and fragmented allowing the Late Cretaceous Atlantic Ocean to breach the sill.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Palisades Diabase
  • Modifications:
    • Areal extent
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Pagano, T.S., 1994, The geology of western Staten Island, New York, north and south of the Fall Line, IN Benimoff, A.L., ed., Geology of Staten Island, New York; field guide and proceedings: Geological Association of New Jersey Annual Field Conference, 11th annual meeting, October 14-15, 1994, v. 11, p. 61-84.


Summary:

Palisades [Palisade] Diabase occurs in a belt that stretches northeast to southwest in the northwest portion of western Staten Island, NY, adjacent to a belt of Lockatong Formation. It is a gray, white, and black dense rock composed mostly of plagioclase feldspar, augite, and quartz, and exhibits very little weathering and fracturing.

Source: GNU records (USGS DDS-6; Reston GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).