Where: Sonora, Mexico (30.6° N, 111.5° W: paleocoordinates 31.6° N, 65.2° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Cerro La Espina Member (Mural Formation), Aptian (125.0 - 113.0 Ma)
• STRATIGRAPHIC RELATIONS: From the Cerro La Espina Mbr of the Mural Fm, which gradationally overlies the Cerro La Puerta Shale, and is overlain by the Mesa Quemada Mbr AGE: Aptian, 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: offshore; lithified, intraclastic, shelly/skeletal wackestone and lithified, intraclastic, shelly/skeletal packstone
Size class: macrofossils
Preservation: replaced with calcite
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 82205: authorized by Austin Hendy, entered by Austin Hendy on 24.07.2008
Creative Commons license: CC BY (attribution)