Casa Saman - [Lagunitas Sandstone, Vedun Fm]: Bartonian, Peru

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Lagunitas peruvianus
Lagunitas samanicus
Gastropoda - Cerithiidae
Cerithium sp. Bruguière 1789
Cerithium (Iddigsia) laevisculum
Tympanotomus lagunitensis
spelled with current rank as Cerithium (Tympanotonus)
Gastropoda - Pachychilidae
Faunus ? lagunitensis Woods 1922
Gastropoda - Turritellidae
Turritella samanensis Olsson 1928
Turritella chira Olsson 1928
Gastropoda - Ampullinidae
Ampullina ortoni Gabb 1870
Gastropoda - Strombidae
Ectinochilus gaudichaudi (d'Orbigny 1842)
Gastropoda - Neogastropoda - Olivellidae
Olivancillaria peruviana Woods 1922
Gastropoda - Neogastropoda - Buccinidae
Pseudoliva samanica
Dorsanum lagunitensis (Woods 1922)
Gastropoda - Neogastropoda - Melongenidae
Melongena sp. Schumacher 1817
Gastropoda - Neogastropoda - Conidae
Conus chiraensis Olsson 1930
recombined as Conus sauridens chiraensis
Gastropoda - Neogastropoda - Terebridae
Terebra sp. Bruguière 1789
Gastropoda - Neogastropoda - Turridae
Scobinella sp. Conrad 1848
Gastropoda - Neogastropoda - Volutidae
Plejona (Volutocorbis) sula n. sp. Olsson 1930
Gastropoda - Neogastropoda - Harpidae
Morum peruvianum n. sp.
Gastropoda - Cassidae
? Sconsia samanica Olsson 1928
recombined as Doliocassis samanica
Gastropoda - Heterostropha - Architectonicidae
Architectonica chira
Architectonica sullana Olsson 1928
Bivalvia - Arcida - Arcidae
Arca (Argina) samanensis Olsson 1929
recombined as Arginella samanensis
Bivalvia - Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778
Bivalvia - Ostreida - Ostreidae
Ostrea samanensis Olsson 1928
Bivalvia - Cardiida - Veneridae
Pitaria samanensis Olsson 1928
recombined as Lamelliconcha samanensis
Bivalvia - Carditida - Carditidae
Venericardia planicosta Lamarck 1801
Subspecies: Venerciardia planicosta var samanensis
    = Venericardia (Venericor) samanensis Olsson 1928
Gardner and Bowles 1939
see common names

Geography
Country:Peru State/province:Piura
Coordinates: 4.7° South, 81.3° West (view map)
Paleocoordinates:12.6° South, 109.9° West
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Paleogene Epoch:Eocene
Stage:Bartonian 10 m.y. bin:Cenozoic 3
Key time interval:Bartonian
Age range of interval:41.30000 - 38.00000 m.y. ago
Stratigraphy
Formation:Verdun Member:Lagunitas Sandstone
Stratigraphic resolution:formation
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:coarse,very coarse poorly lithified sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: Coarse, gritty sandstones.
Environment:submarine fan
Geology comments: Formation composed of turbidites and debris flows
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: No museum repositories are reported, but material my presumably be the AMNH of PRI collections. Because of uncertaintly this field is left ommited.
Taxonomic list comments:Exhaustive for Mollusca.
Metadata
Database number:52525
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:M. Clapham Research group:marine invertebrate
Created:2005-08-10 11:48:32 Last modified:2019-08-01 22:18:12
Access level:the public Released:2005-08-10 11:48:32
Creative Commons license:CC BY
Reference information

Primary reference:

14126. 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]

Secondary references:

36277 J. Gardner and E. Bowles. 1939. The Venericardia planicosta group in the Gulf Province. United States Geological Survey Professional Paper 189(F):143-215 [A. Hendy/A. Hendy]