Bed 16, Section 4 - Celendín [Crisnejas Fm] (Cretaceous of Peru)

Where: Cajamarca, Peru (6.9° S, 78.2° W: paleocoordinates 11.2° S, 48.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• LITHOSTRATIGRAPHY: From the Crisnejas Fm, which locally overlies the Goyllarisquisga Fm (Early Cretaceous), and is overlain by the Pulluicana Gp (Albian-Cenomanian). AGE: Early Albian, on the basis of ammonite biostratigraphy and stratigraphic position; ? Oxytropidoceras carbonarium zone. STRATIGRAPHIC POSITION: Collection from unit 16, a 36 m thick shale unit, in the lower portion of the section.

• bed-level stratigraphic resolution

Environment/lithology: lithified, gray, calcareous shale

• LITHOLOGY: Shale, calcareous, light gray, thin-bedded, soft, fossiliferous, with thick interbeds of dark gray, massive limestone. 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 88168: 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.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Knemiceratidae
Knemiceras sp.
Knemiceras sp. Böhm 1898 ammonite