DV 631-8 [Paracas Fm] (Eocene of Peru)

Where: Peru (14.2° S, 76.1° W: paleocoordinates 21.2° S, 104.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Paracas Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• STRATIGRAPHIC RELATIONS: From the Paracas Fm, which regionally, unconformably, overlies crystaline bedrock and us unconformably overlain by the Otuma Fm (latest Eocene to Early Oligocene). AGE: Late Eocene in text, on the basis of K/Ar dates, siliceous microfossil zonation, and molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, fine-grained sandstone and lithified, medium-grained sandstone

• ENVIRONMENT: Not stated, but appears to be shallow marine siliciclastic setting.
• SPECIFIC LITHOLOGY: Fine-grained sandstone and thin indurated intercalations of medium-grained sandstone. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Collected by DeVries; reposited in the UWBM

Collection methods: surface (in situ),

• COLLECTOR: DeVries. REPOSITORY: Either UWBM, Washington, or MUSM, Peru.

Primary reference: T. J. DeVries. 1998. Oligocene deposition and Cenozoic sequence boundaries in the Pisco Basin (Peru). Journal of South American Earth Sciences 11(3):217-231 [A. Miller/A. Hendy/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 41616: authorized by Austin Hendy, entered by Austin Hendy on 18.07.2004, edited by Sabine Nürnberg

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Probably not complete for locality. Only common and biostratigraphically important taxa listed. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution taxonomic assignments. Identifications made by T.J. DeVires.
Gastropoda
 Epitonioidea - Epitoniidae
Scalina foosei1 DeVries 2007 wentletrap
 Cerithioidea - Turritellidae
Turritella woodsi Lisson 1925 turret shell
 Sorbeoconcha - Aporrhaidae
Peruchilus sp. Olsson 1931 snail
 Neogastropoda - Muricidae
Concholepas sp. Lamarck 1801 murex snail
 Sorbeoconcha - Bursidae
Bursa sp. Roding 1798 frog shell
 Sorbeoconcha - Xenophoridae
Xenophora carditigera n. sp.2 Nielsen and DeVries 2002 carrier shell
Bivalvia
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Pholadida - Corbulidae
Corbula paracasensis Rivera 1957 clam
 Carditida - Carditidae
Cardita newelli Rivera 1957 clam