Where: Sabine County, Louisiana (31.6° N, 93.6° W: paleocoordinates 35.5° N, 75.2° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Logansport Formation (Midway Group), Danian to Danian (66.0 - 56.0 Ma)
• JAS has updated the age of this collection. "Logansport" was noted as a preoccupied name by Palmer and Brann (1965), who instead used the name "Halls Summit". Some confusion about the age of collections from this reference. While text states them to be Eocene, the Wilcox Group is in fact late Paleocene. No finer lithostratigraphic designation is stated in text, but Toulmin (1977) reports many of LeBlanc's taxa as belonging to the Logansport Formation of Sabine Parish, Louisiana. Logansport Formation lies betweent the Naborton and Hall Summit Formations, all of Thanetian age, and underlies further the Ypresian (Earliest Eocene) Marthaville, Pendleton and Sabinetown Formations.
• bed-level stratigraphic resolution
Environment/lithology: offshore; lithified, concretionary, gray, calcareous claystone
Size class: macrofossils
Preservation: concretion
Collection methods: Collected by LaBlanc and Barry (1939).
Primary reference: R. J. LeBlanc and J.O. Barry. 1941. Fossiliferous localities of Midway Group in Louisiana. Bulletin of the American Association of Petroleum Geologists 25(4):734-738 [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 52192: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2005, edited by Laurie Eccles
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Epitonium sp. Bolten 1798 wentletrap | |
Polinices harrisii moon snail | |
Orthosurcula longipersa ribbed mitre | |
Athleta petrosa Conrad 1833 volute | |
Bivalvia | |
"Leda sp." = Nuculana
"Leda sp." = Nuculana Link 1807 pointed nut clam | |
Cardium sp. Linnaeus 1758 cockle | |
Tellina cf. estellensis tellin clam | |
Venericardia sp. Lamarck 1801 clam
Venericardia (Venericor) gardnerae n. sp. clam |