Where: Warren County, Mississippi (32.3° N, 90.9° W: paleocoordinates 32.7° N, 84.3° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Byram Formation, Rupelian (33.9 - 28.1 Ma)
• The Byram Formation is in the middle of a regressive sequence.
• formation-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; unlithified, argillaceous sandstone
Size class: mesofossils
Preservation: original aragonite, original calcite
Collection methods: bulk, mechanical,
• bivalves only**abundances are given as counts ONLY for those species with fewer than 100 specimens - for 100 or more, he just gives "A" for "abundant". In the case where a collection includes an "A", we enter abundance classes for species instead of counts as follows: Fewer than 10 specimens = R (rare)10 to 99 specimens = C (common)Greater than 99 specimens(Dockery's "A") = A (abundant)In this reference, "specimens" equals "valves"
Primary reference: 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]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 7110: authorized by Linda Ivany, entered by Elizabeth Kowalski on 26.04.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Oliva mississippiensis" = Agaronia mississippiensis
"Oliva mississippiensis" = Agaronia mississippiensis Conrad 1848 snail | |
Oliva affluens olive snail | |
Bivalvia | |
Panopea oblongata Conrad 1848 clam | |
| |
Pitar (Lamelliconcha) imitabilis, Pitar (Lamelliconcha) astartiformis, "Chione bainbridgensis" = Chione (Chionopsis) bainbridgensis, Chione perbrevisformis, Chamelea mississippiensis
"Chione bainbridgensis" = Chione (Chionopsis) bainbridgensis Dall 1916 venus clam
Chione perbrevisformis venus clam
Chamelea mississippiensis venus clam | |
Tellina vicksburgensis Conrad 1848 tellin clam | |
| |
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis
"Crassatella mississippiensis" = Crassatella (Crassatella) mississippiensis Conrad 1848 clam | |
Pecten byramensis scallop | |
Atrina argentea Conrad 1848 oyster | |
Ostrea paroxis Lesueur 1829 oyster
Lopha vicksburgensis Conrad 1848 oyster | |
"Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis, Barbatia (Cucullaearca) lima, "Scapharca lesueuri" = Cunearca lesueuri
"Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis Conrad 1848 clam
"Scapharca lesueuri" = Cunearca lesueuri Dall 1848 ark |