Ragley Lumber #D1 well - 11528ft (Eocene of the United States)

Where: Allen County, Louisiana (30.0° N, 92.0° W: paleocoordinates 31.6° N, 81.0° W)

• small collection-level geographic resolution

When: Wilcox Group, Eocene (56.0 - 33.9 Ma)

• Horizon sample from drill core. Gregory and Hart (1995a, pollen and spores) do not recognize the Clairbornian in the core, but in Gregory and Hart (1995, dinoflagellates), they do. Both papers look at the same samples from the same core and derive different age assignments because they treat each independently. RAL elected to enter a uniform age assignment for both papers.

• bed-level stratigraphic resolution

Environment/lithology: deltaic; siltstone and shale

• ...due to a decrease in sediment supply in late Sabian, the style of deltaic sedimentation changed from fluvial-dominated to wave-dominated, shelf-edge deltas (Lowery 1987)
• 50 siltstone and shale samples used in the study by Gregory (1991)

Size class: microfossils

Preservation: original chitin, original sporopollenin

Collection methods: core, chemical,

Primary reference: W. A. Gregory and G. F. Hart. 1995. Distribution of pollen and spores in a subsurface marine Wilcox (Paleocene-Eocene) section in southwest Louisiana. Palynology 19:1-43 [R. Lupia/R. Vaughn]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 33773: authorized by Hallie Sims, entered by Alistair McGowan on 07.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Monoporisporites
  -
Cedripites
  -
Cedripites spp. Woodhouse 1933
Algae
  - Zygnemataceae
Ovoidites spp. Krutzsch 1959
Ginkgoopsida
 Ephedrales -
Ephedripites spp. Bolkhovitina and Potonié 1958
Divisisporites
  -
Angiospermae
 Malvales - Bombacaceae
Bombacacidites spp. Couper 1960
 Fabales - Fabaceae
 Malpighiales - Euphorbiaceae
Tricolporopollenites spp. Thomson and Pflug 1953 spurge
 Fagales - Fagaceae
 Fagales - Juglandaceae
Momipites spp. Wodehouse 1933
Caryapollenites "prodromus-imparalis type" Potonié 1960
(Nichols and Ott, 1978)
 Gunnerales -
 Proteales - Proteaceae
 Mesangiosperms - Liliaceae
Liliacidites spp. Couper 1953
Magnoliopsida
  -
 Coniferales -
 Coniferales - Cupressaceae
Taxodium spp. Richard 1810 cypress
Pinopsida
 Pinales - Pinaceae
Polypodiopsida
  - Polypodiaceae
  - Gleicheniaceae
Gleicheniidites spp. Dettmann 1963
 Schizaeales - Polypodiidae
Cicatricosisporites dorogensis Potonie and Gelletich 1933
Microreticulatisporites
  -
Microreticulatisporites spp. Potonié and Kremp 1954
Pteridopsida
  -
Deltoidospora spp. Miner 1935
Leiotriletes spp. Potonie and Kremp 1954
Osmundacidites spp. Couper 1953
Converrucosisporites
  -
Converrucosisporites spp. Potonié and Kremp 1954
Chlorophyceae
  -
Pediastrum spp. Meyen 1829
Schizosporis
  -
Schizosporis spp. Cookson and Dettmann 1959
Tricolpopollenites
  -
Trudopollis
  -
Trudopollis spp. Pflug 1953
Questionable ID
Quercoidites
  -
Quercoidites spp. Potonié 1960