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Geologic Unit: Towaco
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Map showing publication footprint
  • Usage in publication:
    • Towaco Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Siltstone
    • Sandstone
  • AAPG geologic province:
    • Newark basin
Publication:

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, The Bulletin, v. 25, p. 25-51.


Summary:

Red, gray, and black cyclic siltstones and sandstones in the Newark basin are here named the Towaco Formation of the Newark Supergroup. It is part of the here abandoned Brunswick Formation. Overlies the Preakness Basalt and underlies the Hook Mountain Basalt. Thickness is 295 ft (90 m) at type section. Age is Early Jurassic.

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


Map showing publication footprint
  • Usage in publication:
    • Towaco Formation
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Newark basin
Publication:

Olsen, P.E., 1984, Comparative paleolimnology of the Newark Supergroup; a study of ecosystem evolution: Yale University, Department of Geology Ph.D. thesis, 726 p.


Summary:

Age of the Towaco Formation is Hettangian based on spore and pollen assemblages.

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


Map showing publication footprint
  • Usage in publication:
    • Towaco Formation*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Newark basin
Publication:

Lyttle, P.T., and Epstein, J.B., 1987, Bedrock geologic map of the Newark 2 degrees quadrangle, New York, New Jersey, and Pennsylvania: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1715, 2 sheets, scale 1:250,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_9892.htm]


Summary:

The Towaco Formation of Olsen (1980) is here adopted and is assigned to the here revised Brunswick Group in NJ.

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


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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 ([ ]).

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