Where: Rankin County, Mississippi (32.2° N, 90.2° W: paleocoordinates 32.5° N, 83.7° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Mint Spring Formation, Rupelian (33.9 - 28.1 Ma)
• The Mint Spring Formation consists mostly of fossiliferous sands that lie disconformably above theestuarine clays and sands of the Forest Hill Formation. The sands of the Mint Spring Formation are moderately clean and often show cross-bedding. These sands indicate a near shore shelf enviroment and have a macrofauna dominated by bivalves.
• formation-level stratigraphic resolution
Environment/lithology: offshore; lithified, conglomeratic, calcareous conglomerate and wackestone
Size class: mesofossils
Preservation: original aragonite, original calcite
Collection methods: bulk, mechanical,
• bivalves only.
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: taxonomic analysis
PaleoDB collection 5944: authorized by Linda Ivany, entered by Sarah DeLong on 03.01.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
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•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.
unclassified | |
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Bivalvia | |
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Lucina imbricolamella n. sp., Lucina posteocurta n. sp., "Divaricella subrigaultiana" = Divaricella (Divalinga) subrigaultiana, Anodontia mississippiensis, "Lucina choctavensis" = Lucina (Callucina) choctavensis, Lucina fimbripallium n. sp., Lucina varisculpta n. sp.
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"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea, Timothynus turgida
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"Chione victoria" = Lirophora (Lirophora) victoria, Chione craspedonta, Callista goniopisthus, Callista sobrina, Pitar megacostata n. sp., Pitar protena n. sp., Pitar aldrichi, Pitar astartiformis, Pitar calcanea
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Tellina subprotexta n. sp.
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Laevicardium leptorimum n. sp., Trachycardium planicostata n. sp., Agnocardia glebosum, "Nemocardium diversum" = Nemocardium (Nemocardium) diversum
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle 100+ valves collected
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Crassinella variablis n. sp.
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Astarte planilamella n. sp., Astarte menthifontis n. sp.
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"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
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Crenella fenestra n. sp.
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Scapharca delicatula, "Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis
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"Chlamys menthifontis" = Chlamys (Lyropecten) menthifontis, "Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus, "Pecten poulsoni" = Pecten (Pecten) poulsoni
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop C category
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Scaphopoda | |
Cadulus quadriturritus tusk shell | |
Dentalium varicostata n. sp.
Dentalium varicostata n. sp. tusk shell | |
Gastropoda | |
"Semivertagus menthafontis n. sp." = Clava (Semivertagus)
"Semivertagus menthafontis n. sp." = Clava (Semivertagus) cerith snail | |
Serpulorbis sp. Sasso 1827 worm shell |