Keswick Hills [Parinas Fm] (Eocene of Peru)

Where: Piura, Peru (4.7° S, 81.3° W: paleocoordinates 12.5° S, 109.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Parinas Formation, Bartonian (41.3 - 38.0 Ma)

• LITHOSTRATIGRAPHY: From the Parinas Fm of the Parinas Gp, which regionally overlies the Pale Greda Fm of the Salina Gp (early Middle Eocene) and is regionally overlain by the Restin Fm (late Middle Eocene). AGE: Regarded as late Middle Eocene (p. 9) =Bartonian, on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, coarse-grained, white, yellow sandstone and poorly lithified, pebbly conglomerate

• ENVIRONMENT: Shelfal siliciclastic environment.
• LITHOLOGY: Coarse, gritty, white or yellowish sandstones and pebble conglomerates. LITHIFICATION: Poorly lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Olsson; reposited in the PRI

Collection methods: surface (in situ),

• COLLECTOR: Not stated, but presumably A. Olsson. REPOSITORY: Not stated, but presumably PRI

Primary reference: A. A. Olsson. 1928. Contributions to the Tertiary paleontology of northern Peru: Part 1. Bulletins of American Paleontology 14(52) [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88366: authorized by Austin Hendy, entered by Austin Hendy on 09.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalves, gastropods, and brachiopods. NOMENCLATURE: Authoritative publication, but with somewhat antiquated nomenclature.
Bivalvia
 Pectinida - Anomiidae
Carolia (Parinomya) parinensis Olsson 1928 scallop
 Carditida - Carditidae
Venericardia (Venericor) parinensis Olsson 1928 clam
SUBSPECIES: Venericardia planicosta parinensis
 Pholadida - Raetomyidae
Amotapus arbolensis Woods 1922 clam
 Cardiida - Veneridae
"Pitaria (Lamelliconcha) parinensis n. sp." = Lamelliconcha parinensis, Clementia (Clementia) parinensis
"Pitaria (Lamelliconcha) parinensis n. sp." = Lamelliconcha parinensis Olsson 1928 venus clam
Clementia (Clementia) parinensis Olsson 1928 venus clam
 Cardiida - Donacidae
Donax (Donax) parinensis n. sp. Olsson 1928 clam
Gastropoda
 Neogastropoda - Buccinidae
Dorsanum parinense n. sp. Olsson 1928 true whelk
Pseudoliva monilis n. sp. Olsson 1928 true whelk
 Sorbeoconcha - Potamididae
Telescopium parinense n. sp. Olsson 1928 horn snail
 Sorbeoconcha - Turritellidae
Turritella keswickensis n. sp. Olsson 1928 turret shell