PBDB Collection

Black Gap Section -6J (Cretaceous of the United States)

Where: Pennington County, South Dakota (43.3° N, 103.2° W: paleocoordinates 42.6° N, 63.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Hartland Shale Member (Greenhorn Limestone Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• "It corresponds to the Metoicoceras mosbyense Biozone."

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, pyritic, black, calcareous, carbonaceous shale

• "During the Cenomanian and Turonian, foreland basin subsidence and tectonoeustatic sea-level rise resulted in widespread marine flooding of the WEstern Interior U.S."

• "is characterized by finely and evenly laminated, pyritiferous, dark calcareous shale with high levels of preserved organic carbone (3-4 wt. %) and relatively depauperated faunal assemblages."

Size classes: macrofossils, mesofossils, microfossils

Preservation: mold/impression, original aragonite, original calcite

Collection methods: bulk,

Primary reference: B. S. Sageman and C. R. Bina. 1997. Diversity and Species Abundance Patterns in Late Cenomanian Black Shale Biofacies, Western Interior, U.S. Palaios 12:449-466 [L. Ivany/P. Wall/P. Wall]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 44286: authorized by Linda Ivany, entered by Patrick Wall on 08.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Cephalopoda
Ammonitida - Binneyitidae	"? Borissiakoceras sp." = Borissjakoceras "? Borissiakoceras sp." = Borissjakoceras Arkhangel'skii 1916 ammonite
Ammonitida - Acanthoceratidae	? Neocardioceras sp. ? Neocardioceras sp. Spath 1926 ammonite
Bivalvia
Myalinida - Inoceramidae	Inoceramus ? tenuistriatus, Inoceramus aff. tenuis, Inoceramus ginterensis Inoceramus ? tenuistriatus clam Inoceramus aff. tenuis clam Inoceramus ginterensis Pergament 1966 clam
Ostreida - Pteriidae	Phelopteria minuta, Phelopteria quadrate, Phelopteria quadrate Phelopteria minuta pearl oyster Phelopteria quadrate pearl oyster sp. aff. P. minuta Phelopteria quadrate pearl oyster sp. (rugate)