Occurrence of a Pseudophragmina (Proporocyclina) Zaragosensis bank in upper Wilcox (lower Eocene), Pointe Coupee Parish, Louisiana

Conference · Tue Sep 01 04:00:00 EDT 1987 · AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)

OSTI ID:5697631

Nunn, L L; Lemoine, R C

Rock-forming buildups of larger foraminifera, though not unknown in Louisiana, are rare, and are less common in the Gulf Coast than in Eocene strata from the Tethyan and Caribbean regions. In strata from the upper Wilcox Group (lower Eocene) in Pointe Coupee Parish, Louisiana, they have identified a thin, very rich faunal deposit, or bank made up almost exclusively of the tests of the larger foraminifera species, Pseudophragmina (Proporocyclina) zaragosensis. This is the first report of P. (P.) zaragosensis from the Louisiana Wilcox Group. The bank fauna colonized the sand sea floor on the continental shelf, flourished briefly, and then gradually declined, probably in response to increasing water depth, caused either by compaction-induced subsidence and/or a local or regional rise in relative sea level. This bank indicates that, during late Wilcox deposition, warm, shallow continental-shelf conditions prevailed in this region.

• Research Organization: Basin Research Institute, Baton Rouge, LA
• OSTI ID: 5697631
• Report Number(s): CONF-8710198-
• Conference Information: Journal Name: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States) Journal Volume: 71:9
• Country of Publication: United States
• Language: English

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