Bed 21, Section 3 - Hualgayoc [Pariatambo Fm] (Cretaceous of Peru)

Where: Peru (6.8° S, 78.6° W: paleocoordinates 13.6° S, 52.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pariatambo Formation, Late/Upper Albian (105.3 - 99.6 Ma)

• LITHOSTRATIGRAPHY: From the Pariatambo Fm, which is locally overlain by the Yumagual Fm (Albian-Cenomanian), and overlies the Chulec Fm (Albian). AGE: Albian, on the basis of ammonite biostratigraphy; Oxytropidoceras carbonarium zone; placed here in Late Albian on the basis of stratigraphic position. STRATIGRAPHIC POSITION: Collection from 9 m thick limestone unit, near the middle of the section.

• bed-level stratigraphic resolution

Environment/lithology: lithified, black, gray limestone

• LITHOLOGY: Limestone, black, bituminous, medium- to thin-bedded, platy, fossiliferous weathers gray. 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 88151: authorized by Austin Hendy, entered by Austin Hendy on 02.04.2009

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.
Cephalopoda
 Ammonitida - Prolyelliceratidae
"Lyelliceras ulrichi" = Prolyelliceras ulrichi
"Lyelliceras ulrichi" = Prolyelliceras ulrichi Knechtel 1947 ammonite
 Ammonitida - Mojsisovicsiidae
Oxytropidoceras sp. Stieler 1920 ammonite