Loc. 1 - Matanzas (Miocene of Chile)

Where: Chile (33.9° S, 71.9° W: paleocoordinates 34.7° S, 66.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Navidad Formation, Burdigalian (20.4 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Navidad Fm, for which lithostratigraphic relationships are not discussed (in english) in text. AGE: Early-Middle Miocene in text based on macrofossil biostratigraphy. The age of the Navidad Formation and equivalent units has been a matter of debate for decades (see Gutiérrez et al. 2013; Finger et al. 2013, and Le Roux et al. 2013; references therein). An early Miocene age for the Navidad Formation was derived from studies on mollusks, shark teeth, Sr isotopes, and radiometric (Ar/Ar and K/Ar) dating of volcanic clasts in this unit (Gutiérrez et al. 2013; Finger et al. 2013; references therein). A middle to late Miocene or early Pliocene age for this unit had been interpreted from the study of foraminifers, ostracodes, pollen, Sr isotopes, and Ar/Ar dating of volcanic clasts (Finger et al. 2013 and references therein). Finger (2013) reexamined planktic foraminifers ascribed to the late Miocene and early Pliocene (in Finger et al. 2007), whereupon they recognized that they were misidentified and reassigned the assemblages to the early Miocene (Burdigalian Stage, ~21–16 Ma). Fossils in the Navidad Formation and correlative units yielded 87Sr/86Sr ages of 24–16 Ma (Nielsen and Glodny 2009). STRATIGRAPHIC POSITION: From unknown position within Navidad Fm.

• bed-level stratigraphic resolution

Environment/lithology: submarine fan; poorly lithified siliciclastic sediments

• ENVIRONMENT: Sedimentologic, ichnologic, and paleontologic studies suggest deposition at bathyal depths for part of the Navidad Formation and correlative units (Osorio and Elgueta 1990; Antinao 2000; Finger et al. 2007; Encinas et al. 2008, 2012). Many of the mollusks are redeposited shallow-water species.
• SPECIFIC LITHOLOGY: Interbedded sandstone and mudstone. LITHIFICATION: Poorly lithified to lithified, based on outcrop photos.

Size class: macrofossils

Collected by Covacevich & Frassinetti

Collection methods: surface (in situ),

• COLLECTOR: Presumably V. Covacevich and D. Frassinetti. R, prior to 1980. REPOSITORY: SGO.

Primary reference: V. Covacevich and D. Frassinetti. 1986. El genero Cancellaria en el Mioceno de Chile con descripcion de cuatro especies nuevas (Gaastropoda: Cancellariidae). Revista Geológica de Chile 28-29:33-67 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 78521: authorized by Austin Hendy, entered by Austin Hendy on 07.02.2008, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia and gastropoda. NOMENCLATURE: Authoritative publication, and with taxonomic assignments to species and subgenus resolution.
Cephalopoda
 Nautilida - Aturiidae
Aturia cubaensis2 Lea 1841 nautiloid
Gastropoda
 Trochoidea - Trochidae
Calliostoma sp. Swainson 1840 top snail
 Epitonioidea - Epitoniidae
Opalia rugosa wentletrap
 Neotaenioglossa - Calyptraeidae
Crepidula gregaria slipper shell
 Cerithioidea - Turritellidae
Turritella ambulacrum Sowerby 1846 turret shell
 Sorbeoconcha - Strombidae
"Conus medinae" = Strombus (Austrombus) medinae Philippi 1887 conch
 Sorbeoconcha - Struthiolariidae
 Neogastropoda - Olividae
"Olivancillaria (Lintricula) tumorifera" = Olivancillaria claneophila, Lamprodomina dimidiata
"Olivancillaria (Lintricula) tumorifera" = Olivancillaria claneophila Duclos 1835 olive snail
Lamprodomina dimidiata Sowerby 1846 olive snail
 Neogastropoda - Buccinidae
"Siphonalia subreflexa" = Austrosipho subreflexa, Pseudoliva cepa
"Siphonalia subreflexa" = Austrosipho subreflexa Sowerby 1844 true whelk
Pseudoliva cepa true whelk
 Neogastropoda - Nassariidae
 Neogastropoda - Terebridae
Terebra undulifera auger snail
 Neogastropoda - Turridae
 Neogastropoda - Muricidae
 Neogastropoda - Volutidae
"Proscaphella triplicata" = Palaeomelon triplicata
"Proscaphella triplicata" = Palaeomelon triplicata Sowerby 1846 volute
 Neogastropoda - Cancellariidae
Cancellaria nassariformis Covacevich and Frassinetti 1986 snail
Cancellaria medinae Philippi 1887 snail
Cancellaria reyesi Covacevich and Frassinetti 1986 snail
Cancellaria rudolphi Covacevich and Frassinetti 1986 snail
 Sorbeoconcha - Ficidae
"Ficus (Disconoficus) gayana" = Ficus gayana
"Ficus (Disconoficus) gayana" = Ficus gayana Covacevich and Frassinnetti 1980 fig shell
 Sorbeoconcha - Personidae
"Distorsio (Rhysema) thersites" = Distorsio ringens
"Distorsio (Rhysema) thersites" = Distorsio ringens Philippi 1887 snail
 Sorbeoconcha - Cassidae
 Sorbeoconcha - Ranellidae
"Tritonium bicegoi" = Sassia armata
"Tritonium bicegoi" = Sassia armata Hupé 1854 triton shell
 Sorbeoconcha - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry
 Sorbeoconcha - Naticidae
Polinices famula moon snail
Neverita hupeana moon snail
Neverita obtecta moon snail
Sinum subglobosus Sowerby 1846 moon snail
Natica sp. Scopoli 1777 moon snail
Natica solida Blainville 1825 moon snail
 Heterostropha - Acteonidae
 Heterostropha - Architectonicidae
Heliacus (Torinista) taverai Frassinetti and Covacevich 1981 snail
 Opisthobranchia - Cylichnidae
Scaphander remondi Philippi 1887 snail
 Neritoidea - Neritidae
Bivalvia
 Arcida - Arcidae
Anadara (Anadara) lirata Philippi 1887 ark
 Arcida - Cucullaeidae
Cucullaea chilensis Philippi 1887 clam
 Arcida - Glycymerididae
Glycymeris (Glycymerita) ibariformis Frassinetti and Covacevich 1983 clam
 Ostreida - Pinnidae
Pinna semicostata Philippi 1887 oyster
 Ostreida - Ostreidae
Crassostrea "sp. 1" Sacco 1897 oyster
Crassostrea "sp. 2"1 Sacco 1897 oyster
 Lucinida - Lucinidae
Lucinoma promaucana Philippi 1877 clam
Miltha (Matanziella) vidali Philippi 1887 clam
 Cardiida - Veneridae
Amiantis (Amiantis) navidadensis Frassinetti and Covacevich 1993 venus clam
Dosinia (Dosinia) semilaevis Philippi 1887 venus clam
Chione (Chione) rodulfi Frassinetti and Covacevich 1993 venus clam
 Cardiida - Mactridae
Mactra sp.1 Linnaeus 1767 clam
Mactra oblonga1 Philippi 1887 clam
Mactra pusilla Philippi 1887 clam
 Cardiida - Lahillidae
"Lahillia (Lahillia) angulata" = Lahillia angulata
"Lahillia (Lahillia) angulata" = Lahillia angulata Philippi 1887 clam
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle