ammonites
UCLA Loc. A-407 - Santa Catarina [Rosario Fm] (Cretaceous of Mexico)

Where: Baja California, Mexico (30.6° N, 114.7° W: paleocoordinates 35.9° N, 91.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Rosario Formation, Early/Lower Maastrichtian (70.6 - 65.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Rosario Fm, for which lithostratigraphic relations are not stated. AGE: Early Maastrichtian or close to the Campanian-Maastrichtian boundary, on the basis of ammonite biostratigraphy; here assigned to Early Maastrichtian to avoid stratigraphic orphaning. STRATIGRAPHIC POSITION: From unknown position within section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified siliciclastic sediments

• ENVIRONMENT: No environmental reported. Presumably shallow-water siliciclastic marine.
• SPECIFIC LITHOLOGY: Not stated in text, but presumably siliciclastic. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression

Collected by Santillan & Barrera

Collection methods: surface (in situ),

• COLLECTOR: Santillan and Barrera. REPOSITORY: UCLA.

Primary reference: T. Matsumoto. 1960. Upper Cretaceous ammonites of California. Part III. Memoirs of the Faculty of Science, Kyushu University Series D, Geology, Special Volume II 1-204 [A. Hendy/A. Hendy/A. Hendy] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 86867: authorized by Austin Hendy, entered by Austin Hendy on 22.02.2009

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)