ammonites
Nacimiento W2 (Paleocene of the United States)

Where: San Juan County, New Mexico (36.7° N, 108.2° W: paleocoordinates 42.8° N, 89.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Nacimiento Formation, Paleocene (65.5 - 55.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: "floodplain"

Size class: mesofossils

Preservation: original carbon

Collection methods: bulk,

Primary reference: E. A. Wheeler, J. McClammer, and C.A. LaPasha. 1995. Similarities and differences in dicotyledonous woods of the Cretaceous and Paleocene. San Juan Basin, New Mexico, USA. International Association of Wood Anatomists Journal 16(3):223-254 [B. Tiffney/J. Fosdick/J. Fosdick] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 31196: authorized by Bruce Tiffney, entered by Julia Fosdick on 22.04.2003