Bed 34, Section 3 - Hualgayoc [Culebra Mbr, Mujarún Fm] (Cretaceous of Peru)

Where: Peru (6.8° S, 78.6° W: paleocoordinates 13.5° S, 54.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Choro Member (Mujarún Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• LITHOSTRATIGRAPHY: From the Choro Mbr of the Mujarún Fm, which is locally overlain by the Romirón Fm (Coniacian), and is overlies the Yumagual Fm (Albian-Cenomanian). AGE: Late Cenomanian, on the basis of bivalve and ammonoid biostratigraphy; Exogyra ponderosa zone. STRATIGRAPHIC POSITION: Collection from 194 m thick limestone unit, near the middle of the section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, nodular, gray, calcareous limestone

• LITHOLOGY: Limestone, medium gray, massive, thick-bedded, fossiliferous nodular. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Collected by Benavides; reposited in the AMNH

Collection methods: surface (in situ),

• COLLECTOR: V. E. Benavides. REPOSITORY: AMNH.

Primary reference: V.E. Benavides-Caceres. 1956. Cretaceous system in northern Peru. Bulletin of the American Museum of Natural History 108(4):1-493 [A. Miller/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 88139: authorized by Austin Hendy, entered by Austin Hendy on 01.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Probably not exhaustive, but representative for ammonoids, bivalves, and other invertebrates groups. NOMENCLATURE: Authoritative publication, but with somewhat antiquated nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Bivalvia
 Ostreida - Gryphaeidae
Exogyra cf. ponderosa