MGS #91a: Rupelian, Mississippi

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pectinida - Pectinidae
Pecten poulsoni Morton 1834
A category
recombined as Pecten (Pecten) poulsoni
100+ valves collected
Chlamys menthifontis Glawe 1970
4 individuals
recombined as Chlamys (Lyropecten) menthifontis
R category
Bivalvia - Pholadida - Teredinidae
Teredo sp. Linnaeus 1758
2 individuals
R category
see common names

Geography
Country:United States State/province:Mississippi County:Smith
Coordinates: 32.0° North, 89.5° West (view map)
Paleocoordinates:32.3° North, 83.0° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
*Period:Early/Lower Tertiary *Epoch:Early/Lower Oligocene
*International age/stage:Early/Lower Rupelian - Early/Lower Rupelian
Key time interval:Rupelian
Age range of interval:33.90000 - 27.82000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Marianna Limestone
Stratigraphic resolution:formation
Stratigraphy comments: The Mint Spring Formation - Marianna transgressive sequence began with the subsidence of Forest Hill delta systems. As the northern Gulf waters transgressed inland over the delta plain and estuarine envoronments, the Mint Spring Formation was deposited as a destructional shelf sand in the near-shore environments. Carbonates of the Marianna Limestone were deposited above this sand in the deeper waters of an off shore carbonate shelf.
Lithology and environment
Primary lithology: lithified conglomeratic,calcareous conglomerate
Secondary lithology: "carbonate"
Includes fossils?Y
Includes fossils?Y
Environment:offshore Tectonic setting:passive margin
Taphonomy
Modes of preservation:body,original aragonite,original calcite
Size of fossils:mesofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils,difficult macrofossils
Collection methods:bulk,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: bivalves only.
Taxonomic list comments:the list uses catagories R = rare,1-9 valves collected. C = common, 10-99 valves collected. A = abundant, 100+ valves collected.


Categories are listed in the comments field, absolute abundances are given in the abundance field.
Since taxa with greater than 99 specimens were not counted with absolute abundances, these were reported with category "A" for abundant.
Metadata
Database number:5951
Authorizer:L. Ivany Enterer:S. DeLong
Modifier:J. Sessa Research group:GCP,marine invertebrate
Created:2000-01-04 08:59:33 Last modified:2010-08-06 10:55:52
Access level:the public Released:2000-01-04 08:59:33
Creative Commons license:CC BY
Reference information

Primary reference:

323. D. T. Dockery. 1982. Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources Bureau of Geology 123:1-261 [L. Ivany/S. DeLong/M. Uhen]