Toledo Bend Core Microfossils Danville Formation (Eocene of the United States)

Where: Sabine/Newton County, Louisiana/Texas (31.2° N, 93.6° W: paleocoordinates 32.0° N, 85.8° W)

• coordinate estimated from map

When: Danville Landing Member, Late/Upper Eocene (37.2 - 33.9 Ma)

• upper Jacksonian

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; concretionary, gypsiferous, yellow, blue, argillaceous, silty, calcareous claystone

• inner sublittoral zone of a nearshore open-marine environment. The large number of species present and the large number of specimens per unit volume of sediment inidicate favorable living conditiona and a slow rate of deposition. Wilbert (1953) presents a map showing the maximum advance of the Jacksonian sea
• "blue to yellow, calcareous, gypsiferous, fossiliferous, argillaceous, concretionary clay and mudstone."

•"data assembled from surface sections and shallow borings indicates a thickness of at least 100ft."

Size classes: macrofossils, microfossils

Preservation: replaced with pyrite

Collection methods: core, sieve,

Primary reference: D. R. Anderson. 1965. Biostratigraphy of the Vicksburgian Equivalent at Toledo Bend Dam Site, Louisiana and Texas. Transactions of The Gulf Coast Association of Geological Societies 15:61-71 [L. Ivany/P. Wall/P. Wall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 45017: authorized by Linda Ivany, entered by Patrick Wall on 28.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Lituolacea - Haplophragmoiidae
Haplophragmoides sp. Cushman 1910
Ammobaculites sp. Cushman 1910
 Lituolacea - Lituolidae
Ammomarginulina sp. Wiesner 1931
 Chilostomellacea - Heterolepidae
 Chilostomellacea - Gavelinellidae
Hanzawaia sp. Asano 1944
 Rotaliina - Fursenkoinidae
 Rotaliina - Cassidulinidae
 Rotaliina - Siphoninidae
 Planorbulinacea - Cibicididae
 Buliminacea - Siphogenerinoididae
 Buliminacea - Uvigerinidae
 Buliminacea - Buliminidae
 Discorbacea - Bagginidae
 Discorbacea - Discorbidae
 Discorbacea - Eponididae
 Rotaliacea - Rotaliidae
 Rotaliacea - Elphidiidae
Elphidium sp. Monfort 1808
 Nonionacea - Nonionidae
 Rotaliina - Bolivinidae
 Globigerinaceae - Globigerinidae
Globigerina sp. d'Orbigny 1826
Globigerina lineaperta
ssp. lineaperta
Globigerina ouachitaensis Howe and Wallace 1932
ssp. ouachitaensis
 Globigerinaceae - Globorotaliidae
"Globigerina dutertrei" = Neogloboquadrina dutertrei
"Globigerina dutertrei" = Neogloboquadrina dutertrei d'Orbigny 1839
  - Spiroplectamminidae
 Globigerinina - Hedbergellidae
"Globigerina ampliapertura" = Turborotalia ampliapertura Bolli 1957
 Textulariacea - Textulariidae
 Trochamminacea - Trochamminidae
Trochammina sp. Parker and Jones 1859
 Nodosariacea - Polymorphinidae
 Nodosariacea - Nodosariidae
Lagena sp. Walker and Boys 1784
Lagena substriata Williamson 1848
Dentalina sp. d'Orbigny 1826
Lenticulina sp. Lamarck 1804
 Nodosariacea - Glandulinidae
Glandulina laevigata d'Orbigny 1826
 Podocopida - Paracyprididae
Paracypris franquesi Howe and Chambers 1935 ostracod
 Podocopida - Hemicytheridae
 Podocopida - Trachyleberididae
 Podocopida -
Cytheretta alexanderi Howe and Chambers 1935 ostracod
 Miliolida - Cornuspiridae
Cornuspira sp. Schultze 1854
 Miliolida - Miliolidae
 Miliolida - Hauerinidae