Where: New Mexico (36.4° N, 104.6° W: paleocoordinates 39.5° N, 71.4° W)
• coordinate based on nearby landmark
• basin-level geographic resolution
When: Smoky Hill Shale Member (Niobrara Formation), Early/Lower Coniacian (89.3 - 85.8 Ma)
• STRATIGRAPHIC RELATIONS: From the Lower Shale of the Smokey Hill Shale, Niobrara Fm, which regionally overlies the Carlisle Shale . AGE: Early Coniacian, on the basis of inoceramid and ammonite biostratigraphy. STRATIGRAPHIC POSITION: List representative of the Smokey Hill Shale.
• member-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 87847: 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 | |
"Phlycticrioceras oregonense" = Phlycticrioceras trinodosus
"Phlycticrioceras oregonense" = Phlycticrioceras trinodosus Geinitz 1850 ammonite | |
Protexanites shoshonensis ammonite | |
Bivalvia | |
"Inoceramus (Platyceramus) platinus" = Platyceramus platinus, "Inoceramus (Magadiceramus) subquadratus" = Magadiceramus subquadratus, "Inoceramus (Cremnoceramus) deformis" = Cremnoceramus deformis, Inoceramus (Cremnoceramus) browni, Inoceramus (Cremnoceramus) schloenbachi, Inoceramus (Volviceramus) grandis
"Inoceramus (Platyceramus) platinus" = Platyceramus platinus Logan 1898 clam
"Inoceramus (Magadiceramus) subquadratus" = Magadiceramus subquadratus Schlüter 1887 clam
"Inoceramus (Cremnoceramus) deformis" = Cremnoceramus deformis Meek 1871 clam | |
Pseudoperna congesta oyster |