Bed 21, Pomachaca section (Cretaceous of Peru)

Where: Peru (9.4° S, 77.1° W: paleocoordinates 13.7° S, 47.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Inca Formation, Early/Lower Albian (112.0 - 109.0 Ma)

• LITHOSTRATIGRAPHY: From the Inca Fm, which overlies the Goyllarisquisga Fm (Aptian), and is overlain by the Chulec Fm (Albian). AGE: Early Albian, on the basis of ammonite biostratigraphy; Parahoplites nicholsoni. STRATIGRAPHIC POSITION: Bed 6 of section.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, nodular, gray marl

• LITHOLOGY: Marl, dark gray, nodular, fossiliferous. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

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 158986: authorized by Matthew Clapham, entered by Matthew Clapham on 24.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive 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
Cephalopoda
 Ammonitida - Knemiceratidae
Knemiceras sp.
Knemiceras sp. Böhm 1898 ammonite
 Ammonitida - Douvilleiceratidae
Douvilleiceras monile
Douvilleiceras monile Sowerby 1816 ammonite