Also known as M 78

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, brown, gray, yellow, calcareous siltstone

Size classes: macrofossils, mesofossils

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 52196: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2005, edited by Laurie Eccles

Creative Commons license: CC BY (attribution)