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 is mostly fossiliferous sands that lie disconformably above the Forest Hill Formation. This contact is characterized by shell gravels that are largely comprised of the bivalve "Callista" by lithified clay clasts bored by the bivalve "Jouannetia", and by shark and ray teeth. Lithified clay clasts are especially common at the base of the Mint Spring Formation alnog the Chickasawhay River in Wayne County. Here clay clasts are numerous enough to have created a cobble bottom on the Mint Spring sea floor. These clasts formed a hard substrate utilized by a variety of encrusting organisms. The sands of the Mint Spring Formation are moderately clean, and often show evidence of cross-bedding. These sands have 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 5943: authorized by Linda Ivany, entered by Sarah DeLong on 03.01.2000, edited by Austin Hendy
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.
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Vetidrillia palmerae n. gen. n. sp.1
Vetidrillia palmerae n. gen. n. sp.1 | |
Scaphopoda | |
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Gastropoda | |
"Semivertagus menthafontis n. sp." = Clava (Semivertagus)1
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"Ampullinopsis mississippiensis" = Natica mississippiensis1
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Microsurcula mentha n. sp.1
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"Conus alveatus" = Conus sauridens1
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Aporrhais menthafontis n. sp.1
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Discopsis pilsbryi n. sp.1
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Eulimella clearyensis n. sp.1
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Volvulella subspinosa n. sp.1
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Bivalvia | |
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"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea
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Pitar aldrichi, Pitar megacostata, "Chione victoria" = Lirophora (Lirophora) victoria, Chione craspedonta, Callista goniopisthus, Callista sobrina
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Laevicardium leptorimum n. sp., "Nemocardium diversum" = Nemocardium (Nemocardium) diversum, Agnocardia glebosum, Trachycardium planicostata n. sp.
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle 100+ valves collected
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Anodontia mississippiensis, Lucina triloba n. sp., Lucina imbricolamella n. sp., "Divaricella subrigaultiana" = Divaricella (Divalinga) subrigaultiana, Myrtea vicksburgensis, Lucina posteocurta n. sp., "Lucina choctavensis" = Lucina (Callucina) choctavensis, Lucina sp., Lucina varisculpta n. sp.
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Crassinella variablis n. sp.
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"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
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Astarte menthifontis n. sp., Astarte planilamella n. sp.
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Crenella fenestra n. sp.
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Arcoperna linteata n. sp.
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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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Anomia microstriata n. sp.
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Trinacria menthifontis n. sp., "Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis, Scapharca chordicosta n. sp., Scapharca delicatula
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Thecostraca | |
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