Rancho Bufalo section [Los Coyotes Mbr, Mural Fm] (Cretaceous of Mexico)

Where: Sonora, Mexico (31.1° N, 109.6° W: paleocoordinates 31.2° N, 69.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Los Coyotes Member (Mural Formation), Albian (113.0 - 100.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Los Coyotes Member of the Mural Fm, which overlies gradationally the Cerro La Ceja Mbr, and is overlain by the Cerro La Ceja Mbr. AGE: Albian, on the basis of ammonite, bivalve, and foram biostratigraphy, and U/Pb zircon radiometric ages. STRATIGRAPHIC POSITION: List representative of entire member at this section.

• member-level stratigraphic resolution

Environment/lithology: coastal; lithified, bioturbated, argillaceous wackestone and lithified, brown, gray, yellow shale

• ENVIRONMENT: Shallow platform where high-energy shoals, carbonate build-ups of corals and rudists were separated by shallow lagoonal environments
• SPECIFIC LITHOLOGY: Various lithologies, thin-thick bedded, bioturbated shaly wackestone with interbedded dark-gray shale that weathers yellowish brown. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collection methods: COLLECTORS: Multiple collectors, principally, T. F. Lawton and R. W. Scott. REPOSITORY: ERNO, Instituto de Geologia, Universidad Nacional Autónoma de México, Sonora, Mexico.

Primary reference: C. M. González-Léon, R. W. Scott, H. Löser, T. F. Lawton, E. Robert and V.A. Valencia. 2008. Upper Aptian-Lower Albian Mural Formation: stratigraphy, biostratigraphy and depositional cycles on the Sonoran shelf, northern Mexico. Cretaceous Research 29:249-266 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 82147: authorized by Austin Hendy, entered by Austin Hendy on 23.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to biostratigraphically or paleoecologically important taxa and those informally mentioned in text. NOMENCLATURE: Not an authoritative publication, but with fairly modern nomenclature, but unfortunately lacking some species-level identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Douvilleiceratidae
Douvilleiceras sp.
Douvilleiceras sp. Grossouvre 1894 ammonite