Where: Colfax County, New Mexico (36.3° N, 104.7° W: paleocoordinates 39.4° N, 71.6° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Scaphites depressus ammonoid zone, Niobrara Formation, Late/Upper Coniacian (89.3 - 85.8 Ma)
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified sandstone and lithified shale
Size class: macrofossils
Preservation: cast, mold/impression
Primary reference: I. Walaszczyk and W. A. Cobban. 2006. Palaeontology and stratigraphy of the Middle-Upper Coniacian and Santonian inoceramids of the US Western Interior. Acta Geologica Polonica 56(3):241-348 [W. Kiessling/U. Merkel]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 100220: authorized by Wolfgang Kiessling, entered by Uta Merkel on 01.12.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Magadiceramus subquadratus Schlüter 1887 clam
Volviceramus involutus Sowerby 1828 clam |