East of Oak Spring, Sevier Co. [Mancos Shale] (Cretaceous of the United States)

Where: Sevier County, Texas (38.8° N, 111.4° W: paleocoordinates 43.3° N, 77.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Mancos Shale Formation, Coniacian (89.8 - 86.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Mancos Shale, which overlies the Ferron Sandstone. AGE: Coniacian, on the basis of antiquated ammonite biostratigraphy. STRATIGRAPHIC POSITION: From 200 ft above the Ferron Sandstone Mbr.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

• SPECIFIC LITHOLOGY: Shale. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Forrester

Collection methods: surface (in situ),

• COLLECTORS: Forrester. REPOSITORY: USNM.

Primary reference: J. B. Reeside. 1932. The Upper Cretaceous ammonite genus Barroisiceras in the United States. United States Geological Survey Professional Paper 170(B):9-21 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88539: authorized by Austin Hendy, entered by Austin Hendy on 14.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to Barroisiceras described in publication. NOMENCLATURE: Authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications.
Show authors, comments, and common names
Bivalvia
 Myalinida - Inoceramidae
"Inoceramus deformis" = Cremnoceramus deformis
"Inoceramus deformis" = Cremnoceramus deformis Meek 1871 clam
Cephalopoda
 Ammonitida - Baculitidae
Baculites sp.
Baculites sp. Lamarck 1799 ammonite
 Ammonitida - Nostoceratidae
"Helicoceras" sp.
"Helicoceras" sp. d'Orbigny 1840 ammonite
 Ammonitida - Scaphitidae
Scaphites sp.
Scaphites sp. Parkinson 1811 ammonite
 Ammonitida - Placenticeratidae
Placenticeras sp.
Placenticeras sp. Meek 1876 ammonite
 Ammonitida - Collignoniceratidae
Barroisiceras (Alstadenites) sevierense n. sp., "Barroisiceras (Harleites) castellense n. sp." = Harleites castellensis, "Barroisiceras (Forresteria) forresteri n. sp." = Forresteria forresteri
Barroisiceras (Alstadenites) sevierense n. sp. Reeside 1932 ammonite
"Barroisiceras (Harleites) castellense n. sp." = Harleites castellensis Reeside 1932 ammonite
"Barroisiceras (Forresteria) forresteri n. sp." = Forresteria forresteri Reeside 1932 ammonite
 Nautilida - Nautilidae
Eutrephoceras sp.
Eutrephoceras sp. Hyatt 1894