Re: Newark Supergroup

It's principally biostratigraphic: the pollen indicates Jurassic for the youngest strata:

Fowell, S.J. and A. Traverse. 1995. Palynology and age of the upper Blomidon Formation, Fundy Basin, Nova Scotia. Review of Palaeobotany and Palynology 86:211-233.

Cornet, B., A. Traverse and N.G. McDonald. 1973. Fossil spores, pollen, and fishes from Connecticut indicate Early Jurassic age for part of the Newark Group. Science 182:1243-1247.

Olsen, P.E., S.J. Fowell and B. Cornet. 1990. The Triassic/Jurassic boundary in continental rocks of eastern North America; a progress report; pp. 585-593 in V. L. Sharpton and P. D. Ward (eds.), Global Catastrophes in Earth History; an Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality. Geological Society of America Special Paper 247. Geological Society of America, Boulder.

Olsen, P.E. 1980. Triassic and Jurassic formations of the Newark Basin; pp. 2-39 in W. Manspeizer (eds.), Field Studies of New Jersey Geology and Guide to Field Trips. 52nd Annual Meeting Guidebook. Rutgers University,

Olsen, P.E. 1978. On the use of the term Newark for Triassic and Early Jurassic rocks of eastern North America. Newsletter of Stratigraphy 7:90-95.

Olsen, P.E. 1980. The latest Triassic and Early Jurassic formations of the Newark Basin (eastern North America, Newark Supergroup): stratigraphy, structure, and correlation. Bulletin of the New Jersey Academy of Sciences 25:25-51.

Froelich, A.J. and P.E. Olsen. 1984. Newark Supergroup, a revision of the Newark Group in eastern North America. U.S. Geological Survey Bulletin 1537A:A55-A58.

Olsen, P.E. and H.-D. Sues. 1986. Correlation of continental Late Triassic and Early Jurassic sediments, and patterns of the Triassic-Jurassic tetrapod transition; pp. 321-351 in K. Padian (eds.), The Beginning of the Age of Dinosaurs. Cambridge University Press, Cambridge.

Olsen, P.E. 1990. Tectonic, climatic, and biotic modulations of lacustrine ecosystems - Examples from the Newark Supergroup of eastern North America; pp. 209-224 in B. J. Katz (eds.), Lacustrine Basin Exploration - Case Studies and Modern Analogs. American Association of Petroleum Geologists Memoir 50.

Olsen, P.E. 1997. Stratigraphic record of the early Mesozoic breakup of Pangea in the Laurasia-Gondwana rift system. Annual Review of Earth and Planetary Sciences 25:337-401.

the position of the spore spike using paleomag (so the position of the TJB can be found independent of biostrat!) e.g.:

Olsen, P.E., D.V. Kent, B. Cornet, W.K. Witte and R.W. Schlische. 1996. High-resolution stratigraphy of the Newark Rift Basin (Early Mesozoic, eastern North America). Geological Society of America Bulletin 108:40-77.

Olsen's TJ studies homepage: http://www.ldeo.columbia.edu/~polsen/nbcp/trjworkinggroup.html

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Emma C. Rainforth
Geosciences Rm. 206E
Lamont-Doherty Earth Observatory
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ph. (845) 365-8621

fax (801) 838-4126
emmar@ldeo.columbia.edu
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