Ragley Lumber #D1 well - 10914ft: Eocene, Louisiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Thompsonipollis magnificus microspore
19 specimens
Inapertisporites spp.
2 specimens
Monoporisporites spp.
1 specimen
Pteridopsida
Leiotriletes spp. microspore
1 specimen
Deltoidospora spp. microspore
8 specimens
Osmundacidites spp. microspore
3 specimens
unclassified
Microreticulatisporites spp. microspore
2 specimens
Polypodiopsida - Gleicheniaceae
Gleicheniidites spp. microspore
2 specimens
Polypodiopsida - Schizaeales - Schizaeaceae
Cicatricosisporites dorogensis microspore Potonie and Gelletich 1933
33 specimens
Polypodiopsida - Polypodiaceae
Laevigatosporites spp. microspore
20 specimens
Magnoliopsida
Favitricolporites baculoferous microspore
1 specimen
Coniferales
Coniferales Bisaccate spp. microspore
11 specimens
Coniferales - Cupressaceae
Taxodium spp. microspore
19 specimens
Angiospermae - Proteales - Proteaceae
Triporopollenites bituitus microspore
1 specimen
Triporopollenites sp. microspore Pflug and Thomson 1953
10 specimens
Angiospermae - Fagales - Juglandaceae
Platycaryapollenites platycaryoides microspore
2 specimens
Momipites spp. microspore
1 specimen
Caryapollenites informal prodromus-imparalis type microspore
5 specimens
(Nichols and Ott, 1978)
Angiospermae - Malvales - Bombacaceae
Bombacacidites spp. microspore
2 specimens
Algae - Zygnemataceae
Ovoidites spp. microspore
1 specimen
Lycopodiopsida - Lycopodiales - Lycopodiaceae
Lycopodiumsporites spp. microspore
1 specimen
unclassified
Quercoidites spp. microspore
1 specimen
Tricolpopollenites spp. microspore
1 specimen
see common names

Geography
Country:United States State/province:Louisiana County:Allen
Coordinates: 30.0° North, 92.0° West (view map)
Paleocoordinates:31.6° North, 81.0° West
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2-3
Key time interval:Eocene
Age range of interval:56.00000 - 33.90000 m.y. ago
Stratigraphy
Stratigraphy comments: 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.
Lithology and environment
Primary lithology: siltstone
Secondary lithology: "shale"
Lithology description: 50 siltstone and shale samples used in the study by Gregory (1991)
Environment:deltaic indet. Tectonic setting:passive margin
Glacial or sequence phase:regressive
Geology comments: ...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)
Taphonomy
Modes of preservation:original chitin,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection methods:core,chemical
Reason for describing collection:paleoecologic analysis
Metadata
Database number:33761
Authorizer:H. Sims Enterer:A. McGowan
Modifier:J. Alroy Research group:paleobotany
Created:2003-08-07 06:59:40 Last modified:2004-03-10 11:51:57
Access level:the public Released:2003-08-07 06:59:40
Creative Commons license:CC BY
Reference information

Primary reference:
4067. 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]