MGS #99b: Rupelian, Mississippi

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pectinida - Pectinidae
Pecten poulsoni Morton 1834
A category
recombined as Pecten (Pecten) poulsoni
100+ valves collected
Gastropoda - Cassidae
Cassis flintensis Mansfield 1940
MacNeil and Dockery 1984
Gastropoda - Ranellidae
Sassia conradiana
MacNeil and Dockery 1984
Sassia conradiana menthafons
see common names

Country:United States State/province:Mississippi County:Rankin
Coordinates: 32.2° North, 90.2° West (view map)
Paleocoordinates:32.5° North, 83.7° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
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
Formation:Marianna Limestone
Stratigraphic resolution:formation
Stratigraphy comments: Marianna Limeatone similar to Mint Spring Formation. Highly carbonaceous, here aragonitic shells generally have been leached leaving only the molds.
Lithology and environment
Primary lithology: lithified conglomeratic,calcareous conglomerate
Secondary lithology: "carbonate"
Includes fossils?Y
Includes fossils?Y
Environment:offshore Tectonic setting:passive margin
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:list uses catagories. R = rare, 1-9 valves collected. C = common, 10-99 valves collected. A = abundant, 100+ valves collected. Actual values for the rare and common are listed in the comments section, actual values for the abundant valves are unknown.
Database number:5953
Authorizer:L. Ivany Enterer:S. DeLong
Modifier:J. Sessa Research group:GCP,marine invertebrate
Created:2000-01-04 09:18:20 Last modified:2010-08-06 10:56:45
Access level:the public Released:2000-01-04 09:18:20
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]

Secondary references:

447 F. S. MacNeil and D. T. Dockery. 1984. Lower Oligocene Gastropoda, Scaphopoda, and Cephalopoda of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources, Bureau of Geology Bulletin 124:1-415 [L. Ivany/E. Kowalski/P. Wagner]