Where: Piura, Peru (4.7° S, 81.3° W: paleocoordinates 12.6° S, 109.9° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Lagunitas Sandstone Member (Verdun 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? 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: CC BY (attribution)
Taxonomic list
unclassified | |
Bivalvia | |
Ostrea samanensis Olsson 1928 oyster | |
Glycymeris sp. Da Costa 1778 clam | |
"Arca (Argina) samanensis" = Arginella samanensis
"Arca (Argina) samanensis" = Arginella samanensis Olsson 1929 clam | |
Venericardia (Venericor) samanensis Olsson 1928 clam Subspecies: Venerciardia planicosta var samanensis
| |
"Pitaria samanensis" = Lamelliconcha samanensis
"Pitaria samanensis" = Lamelliconcha samanensis Olsson 1928 venus clam | |
Gastropoda | |
Architectonica chira sundial
Architectonica sullana Olsson 1928 sundial | |
Ampullina ortoni Gabb 1870 snail | |
Ectinochilus gaudichaudi d'Orbigny 1842 true conch | |
Plejona (Volutocorbis) sula n. sp.
Plejona (Volutocorbis) sula n. sp. Olsson 1930 volute | |
Morum peruvianum n. sp.
Morum peruvianum n. sp. snail | |
Olivancillaria peruviana Woods 1922 snail | |
"Conus chiraensis" = Conus sauridens chiraensis
"Conus chiraensis" = Conus sauridens chiraensis Olsson 1930 cone shell | |
Terebra sp. Bruguière 1789 auger snail | |
Scobinella sp. Conrad 1848 turrid | |
Melongena sp. Schumacher 1817 snail | |
Pseudoliva samanica true whelk
Dorsanum lagunitensis Woods 1922 true whelk | |
"? Sconsia samanica" = Doliocassis samanica
"? Sconsia samanica" = Doliocassis samanica Olsson 1928 snail | |
Turritella chira Olsson 1928 turret shell
Turritella samanensis Olsson 1928 turret shell | |
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 |