Where: Piura, Peru (4.7° S, 81.3° W)
• Paleocoordinates: 4.6° S, 69.2° W (Wright 2013)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Lagunitas Sandstone Member (Verdun Formation), Bartonian (41.0 - 37.7 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? The Verdun Formation is presumably (by Olsson) correlated to the Saman Formation, although this has been complicated by a lack of exposures in the intermediate area. The Lagunitas Sandstone belongs to the upper part of the Verdun Formation. They are directly overlain by the Chira Shales and achieve a thickness of about 600 ft in thickness.
• formation-level stratigraphic resolution
Environment/lithology: submarine fan; poorly lithified, coarse-grained sandstone
Size class: macrofossils
Collection methods: quarrying,
• No museum repositories are reported, but material my 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 52525: authorized by Austin Hendy, entered by Austin Hendy on 10.08.2005
Creative Commons license: CC0 (CC0)
Taxonomic list
unclassified | |
Bivalvia | |
Glycymeris sp. Da Costa 1778 bittersweet clam | |
"Arca (Argina) samanensis" = Arginella samanensis
"Arca (Argina) samanensis" = Arginella samanensis Olsson 1929 clam | |
Ostrea samanensis Olsson 1928 oyster | |
"Pitaria samanensis" = Lamelliconcha samanensis
"Pitaria samanensis" = Lamelliconcha samanensis Olsson 1928 venus clam | |
"Venericardia planicosta samanensis" = Venericardia (Venericor) samanensis
"Venericardia planicosta samanensis" = Venericardia (Venericor) samanensis Olsson 1928 clam | |
Gastropoda | |
Architectonica chira sundial
Architectonica sullana Olsson 1928 sundial | |
Faunus ? lagunitensis Woods 1922 snail | |
Cerithium sp., Cerithium (Iddigsia) laevisculum, "Tympanotomus lagunitensis" = Cerithium (Tympanotonus)
Cerithium sp. Bruguière 1789 cerith snail
Cerithium (Iddigsia) laevisculum cerith snail
"Tympanotomus lagunitensis" = Cerithium (Tympanotonus) cerith snail | |
Turritella samanensis Olsson 1928 turret shell
Turritella chira Olsson 1928 turret shell | |
Ampullina ortoni Gabb 1870 snail | |
"? Sconsia samanica" = Doliocassis samanica
"? Sconsia samanica" = Doliocassis samanica Olsson 1928 snail | |
Olivancillaria peruviana Woods 1922 olive snail | |
Plejona (Volutocorbis) sula n. sp.
Plejona (Volutocorbis) sula n. sp. Olsson 1930 volute | |
Morum peruvianum n. sp.
Morum peruvianum n. sp. snail | |
Melongena sp. Schumacher 1817 snail | |
Pseudoliva samanica true whelk
Dorsanum lagunitensis Woods 1922 true whelk | |
"Conus chiraensis" = Conus sauridens chiraensis
"Conus chiraensis" = Conus sauridens chiraensis Olsson 1930 cone shell | |
Scobinella sp. Conrad 1848 turrid | |
Terebra sp. Bruguière 1789 auger snail | |
Ectinochilus gaudichaudi d'Orbigny 1842 true conch |