Lomitos Cgl, Talara Fm - Caleto Sal, Peru (Eocene of Peru)

Where: Piura, Peru (4.5° S, 81.3° W: paleocoordinates 12.3° S, 109.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Talara Shale Member (Talara Formation), Bartonian (41.3 - 38.0 Ma)

• Regarded as lower Upper Eocene on the basis of faunal similarity. Foraminifera suggest an upper Eocene age. Olsson states that the Talara and Saman rocks can be referred to the Upper Eocene and in terms of the European section, to the Bartonian and Ludian.....respectively? In most places the Talara Formation can be divided into three members, a lower shale (Talara Shale), a middle sandstone (Talara Sandstone), and an upper shale (Pozo Shale). In a complete section the Talara Formation has an average thickness of about 2800 ft. The collection is derived from a sandy basal layer known as the Lomitos Conglomerate in the Talara Shale member, which can reach a thickness of 400 ft or more. Collection derived from an outcrop containing well exposed sandstone lying on more steeply dipping Restin shales.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified sandstone

• Appears to be shelfal siliciclastic environment judging from faunal composition.
• Sandstone

Size class: macrofossils

Collection methods: quarrying,

• No museum repositories are reported, but material may presumably be the AMNH of PRI collections. Because of uncertaintly this field is left ommited.

Primary reference: A. A. Olsson. 1930. Contributions to the Tertiary Paleontology of Northern Peru: Part 3, Eocene Mollusca. Bulletins of American Paleontology 17(62):1-164 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52536: authorized by Austin Hendy, entered by Austin Hendy on 10.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Mollusca.
Asterodiscocyclina stewarti
Typo?, listed as: "Asterodicocyclina"
 Nummulitacea - Discocyclinidae
 Terebratulida - Megathyrididae
 Pholadida - Raetomyidae
Amotapus arbolensis Woods 1922 clam
 Cardiida - Mactridae
"Spisula (Oxyperas) deserta" = Oxyperas deserta Olsson 1928 clam
Spisula (Spisula) caleta Olsson 1928 clam
Spisula (Spisula) hualtaca Olsson 1928 clam
 Cardiida - Veneridae
"Clementia peruviana n. sp." = Clementia (Egesta) peruviana
"Clementia peruviana n. sp." = Clementia (Egesta) peruviana Olsson 1928 venus clam
 Neogastropoda - Turbinellidae
Xancus peruvianus Olsson 1928 snail
 Sorbeoconcha - Potamididae
Harrisianella peruviana Olsson 1929 horn snail
 Ichnofossils - Asteriacitidae