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.
unclassified | |
Vetidrillia palmerae n. gen. n. sp.1
Vetidrillia palmerae n. gen. n. sp.1 | |
Gastropoda | |
"Semivertagus menthafontis n. sp." = Clava (Semivertagus)1
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"Conus alveatus" = Conus sauridens1
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Microsurcula mentha n. sp.1
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Aporrhais menthafontis n. sp.1
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"Ampullinopsis mississippiensis" = Natica mississippiensis1
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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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Scaphopoda | |
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Bivalvia | |
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"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
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Astarte planilamella n. sp., Astarte menthifontis n. sp.
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Crassinella variablis n. sp.
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Agnocardia glebosum, "Nemocardium diversum" = Nemocardium (Nemocardium) diversum, Laevicardium leptorimum n. sp., Trachycardium planicostata n. sp.
"Nemocardium diversum" = Nemocardium (Nemocardium) diversum Conrad 1848 cockle 100+ valves collected
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Callista goniopisthus, Callista sobrina, Chione craspedonta, "Chione victoria" = Lirophora (Lirophora) victoria, Pitar aldrichi, Pitar megacostata
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"Diplodonta eburnea" = Diplodonta (Diplodonta) eburnea
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Anodontia mississippiensis, "Divaricella subrigaultiana" = Divaricella (Divalinga) subrigaultiana, Lucina posteocurta n. sp., Myrtea vicksburgensis, Lucina triloba n. sp., Lucina imbricolamella n. sp., Lucina sp., Lucina varisculpta n. sp., "Lucina choctavensis" = Lucina (Callucina) choctavensis
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Scapharca chordicosta n. sp., Scapharca delicatula, Trinacria menthifontis n. sp., "Barbatia mississippiensis" = Barbatia (Cucullaearca) mississippiensis
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"Pecten poulsoni" = Pecten (Pecten) poulsoni, "Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus, "Chlamys menthifontis" = Chlamys (Lyropecten) menthifontis
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop C category
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Anomia microstriata n. sp.
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Arcoperna linteata n. sp.
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Crenella fenestra n. sp.
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Thecostraca | |
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