LGS 1 formerly Locality #1 - Logansport Formation (Paleocene to of the United States)

Also known as M 88

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".

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, concretionary, calcareous claystone

• No paleoenvironmental data stated. Appears to be a shallow shelfal environment. Enterer has designated it as "offshore siliciclastic".
• Fossils occur in septarian calcaerous concretions within either siltstone or claystone background sediments.

Size classes: macrofossils, mesofossils

Preservation: concretion

Collection methods: Collected by LaBlanc and Barry (1939); a short distance from locality Harris (1899) reported fossils from.

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 52190: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2005, edited by Laurie Eccles

Creative Commons license: CC BY (attribution)

Taxonomic list

• Antiquated nomenclature. Reviewed by LaBlanc (1942), and some names are validated by Toulmin (1977).
Show authors, comments, and common names
Gastropoda
 Epitonioidea - Epitoniidae
Epitonium sp.
Epitonium sp. Bolten 1798 wentletrap
 Cerithioidea - Turritellidae
Turritella aldrichi, Turritella "sp. A", Turritella gardnerae n. sp.1
Turritella aldrichi turret shell
Turritella "sp. A" Lamarck 1799 turret shell
Turritella gardnerae n. sp.1 turret shell
 Sorbeoconcha - Naticidae
Polinices harrisii
 Sorbeoconcha - Ficidae
Priscoficus juvenis
 Neogastropoda - Costellariidae
Orthosurcula longipersa, Orthosurcula persa
Orthosurcula persa ribbed mitre
including O. persa n. var. pleasanthillensis
 Neogastropoda - Fasciolariidae
Falsifusus harrisi2
 Neogastropoda - Volutidae
Athleta petrosa
Athleta petrosa Conrad 1833 volute
 Sorbeoconcha - Rostellariidae
Calyptraphorus aldrichi
Bivalvia
 Nuculanida - Nuculanidae
"Yoldia (cf. Orthoyoldia) kindlei" = Orthoyoldia2, "Nuculana fiski n. sp." = Nuculana1, "Leda sp." = Nuculana
"Yoldia (cf. Orthoyoldia) kindlei" = Orthoyoldia2 pointed nut clam
"Nuculana fiski n. sp." = Nuculana1 pointed nut clam
"Leda sp." = Nuculana Link 1807 pointed nut clam
 Pholadida - Corbulidae
Corbula sp.
Corbula sp. Bruguière 1789 clam
Corbula (Caryocorbula) sp. B
 Cardiida - Tellinidae
Tellina cf. estellensis
 Lucinida - Lucinidae
Lucina sp.
Lucina sp. Bruguière 1797 clam
 Carditida - Carditidae
Venericardia sp., Venericardia (Venericor) gardnerae n. sp.1
Venericardia sp. Lamarck 1801 clam
1Barry and LeBlanc 1942; 2Palmer and Brann 1965