Where: Pueblo County, Colorado (38.3° N, 104.6° W: paleocoordinates 42.5° N, 71.4° W)
• coordinate based on nearby landmark
• basin-level geographic resolution
When: Clioscaphites saxitonianus ammonoid zone, Smoky Hill Shale Member (Niobrara Formation), Early/Lower Santonian (85.8 - 83.5 Ma)
• STRATIGRAPHIC RELATIONS: From the Smoky Hill Shale Mbr of the Niobrara Fm, which regionally overlies the First Hays Limestone and the Carlisle Shale . AGE: Late Coniacian-Late Santonian, on the basis of inoceramid and ammonite biostratigraphy. STRATIGRAPHIC POSITION: List representative of the the middle shale unit of the Smoky Hill Shale.
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal shelf; lithified shale
Size class: macrofossils
Preservation: cast, mold/impression
Reposited in the UNSM
Collection methods: surface (in situ), ,
• COLLECTORS: Scott, Cobban, Merewether, and Buckhorn (1984). REPOSITORY: USNM.
Primary reference: G. R. Scott, W. A. Cobban, and E. A. Merewether. 1986. Stratigraphy of the Upper Cretaceous Niobrara Formation in the Raton basin, New Mexico. New Mexico Bureau of Mines and Mineral Resources Bulletin 115:1-34 [A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 87852: authorized by Austin Hendy, entered by Austin Hendy on 26.03.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Baculites sp. Lamarck 1799 ammonite
Baculites codyensis Reeside 1927 ammonite
Baculites asper Morton 1830 ammonite | |
Scaphites binneyi, Scaphites depressus, Clioscaphites choteauensis, Clioscaphites saxitonianus, Clioscaphites vermiformis
Scaphites binneyi Reeside 1927 ammonite
Scaphites depressus Reeside 1927 ammonite
Clioscaphites choteauensis ammonite
Clioscaphites saxitonianus McLearn 1929 ammonite
Clioscaphites vermiformis Meek and Hayden 1862 ammonite | |
Placenticeras placentum, "Stantonoceras pseudocostatum" = Placenticeras syrtale
Placenticeras placentum ammonite
"Stantonoceras pseudocostatum" = Placenticeras syrtale Morton 1834 ammonite | |
Protexanites shoshonensis ammonite
Texanites americanus Lasswitz 1904 ammonite | |
Bivalvia | |
Anomia subquadrata jingle | |
Ostrea sp. Linnaeus 1758 oyster
Pseudoperna congesta oyster | |
"Inoceramus (Platyceramus) cf. stantoni" = Mytiloides stantoni, Inoceramus sp., "Inoceramus (Cordiceramus) cordiformis" = Cordiceramus cordiformis, "Inoceramus (Cladoceramus) undulatoplicatus" = Cladoceramus undulatoplicatus, "Inoceramus (Platyceramus) platinus" = Platyceramus platinus
"Inoceramus (Platyceramus) cf. stantoni" = Mytiloides stantoni Sokolow 1914 clam
Inoceramus sp. Sowerby 1814 clam
"Inoceramus (Cordiceramus) cordiformis" = Cordiceramus cordiformis Sowerby 1823 clam
"Inoceramus (Cladoceramus) undulatoplicatus" = Cladoceramus undulatoplicatus Roemer 1852 clam
"Inoceramus (Platyceramus) platinus" = Platyceramus platinus Logan 1898 clam | |
Lucina sp. Bruguière 1797 clam |