--> Jurassic Radiolaria in the Subsurface of the Northern Gulf of Mexico, Haynesville Formation, North Louisiana, Ignacio Pujana, Nolan Shaw, Jr., and Patricia F. DuBois, #90093 (2009)

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Jurassic Radiolaria in the Subsurface of the

Northern Gulf of Mexico, Haynesville Formation, North Louisiana



Ignacio Pujana1, Nolan Shaw, Jr.2, and Patricia F. DuBois3


1Geosciences Department, University of Texas at Dallas,

800 W. Campbell Rd., Richardson, Texas  75080-3021


2J-W Operating Co., 15508 Wright Brothers Dr., Addison, Texas  75001


3J-W Operating Co., 7607 Fern Ave., Ste. 403, Shreveport, Louisiana 71105





The presence of Upper Jurassic Radiolaria in cored levels of Lower Bossier–Upper Haynesville Formation at 11,220 ft  (3420 m) and 11,190 ft (3410 m) in the North Louisiana Salt Province is reported here for first time.


This Upper Jurassic section contains a distinctive assemblage of Radiolaria with a well defined lower upper Tithonian to uppermost Kimmeridgian age.  The association is characterized by several conspicuous forms as:  Vallupus hopsoni, Pantanellium ranchitoense, Pantanellium quintachillaensis, Pantanellium meraceibaense, Protovallupus sp., Praeconocaryomma spp., Perispyridium tamanense, and Bivallupus spp.. 


This fauna allows temporal correlations with similar assemblages in many worldwide Upper Jurassic sections:  Antarctica, Argentina, Japan, Central Pacific, California, and most importantly with the Taman and La Caja formations in eastern Mexico.  The living environment according to the radiolarian presence corresponds to normal marine conditions possible with high productivity favored by coastal upwelling.  Deposition and preservation occurred in anoxic conditions.


The use and developing of this biostratigraphic tool in subsurface will contribute to develop a more precise description and classification of deep sources and reservoirs in the Gulf of Mexico Basin.



Pujana, I., N. Shaw, Jr., and P. F. DuBois, 2009, Jurassic Radiolaria in the subsurface of the northern Gulf of Mexico, Haynesville Formation, North Louisiana:  Gulf Coast Association of Geological Societies Transactions, v. 59, p. 637.


AAPG Search and Discover Article #90093 © 2009 GCAGS 59th Annual Meeting, Shreveport, Louisiana