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: Smoky Hill Shale Member (Niobrara Formation), Late/Upper 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 Santonian, on the basis of inoceramid and ammonite biostratigraphy. STRATIGRAPHIC POSITION: From the upper concretionary subunit of the middle shale.
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal shelf; lithified, concretionary shale
Size class: macrofossils
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 87855: authorized by Austin Hendy, entered by Austin Hendy on 26.03.2009
Creative Commons license: CC BY (attribution)