Río Foyel Fm (from Rossi de García and Levy, 1984) (Oligocene of Argentina)

Where: Argentina (41.7° S, 71.4° W: paleocoordinates 43.6° S, 63.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Rio Foyel Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)

• STRATIGRAPHIC RELATIONS: From Rio Foyel Fm. Unknown stratigraphic relations. THICKNESS: From lower 7 m of 18 m thick section. AGE: Considered to be Late Eocene to Early Oligocene according to foraminiferal, ostracod and microfloral biostratigraphy by Chiesa and Camacho (2001). Griffin et al. (2004) indicated an Early Oligocene age with Sr dates. STRATIGRAPHIC POSITION: From lower part of formation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, sandy, calcareous shale

• ENVIRONMENT: Offshore, siliciclastic setting.
• SPECIFIC LITHOLOGY: Massive to finely bedded shale with calcareous sandstone beds. LITHIFICATION: Presumably lithified, based on age and facies (concretions and calcarenites

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTOR: Unknown collector, possibly Rossi de García and Levy (c. 1980's). REPOSITORY: Unknown; some described material is reposited at CIRGEO (unknown location).

Primary reference: J. O. Chiesa and H. H. Camacho. 2001. Invertebrados marino Eocenos de la parte de Río Negro, Argentina. Revista Española de Paleontología 16(2):299-316 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 71599: authorized by Austin Hendy, entered by Austin Hendy on 30.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE; Exhaustive for brachiopods, bivalves, and gastropods. NOMENCLATURE: Authoritative publication, using fairly modern nomenclature and species-level assignments.
Gastropoda
 Ptenoglossa - Vasidae
"Tudicula sp." = Tudicla
"Tudicula sp." = Tudicla Röding 1798 snail
 Cerithioidea - Cerithiidae
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Sorbeoconcha - Campanilidae
 Neogastropoda - Volutidae
"Proscaphella triplicata" = Palaeomelon triplicata, Voluta sp.
"Proscaphella triplicata" = Palaeomelon triplicata Sowerby 1846 volute
Voluta sp. Linnaeaus 1758 volute
 Sorbeoconcha - Naticidae
Natica sp. Scopoli 1777 moon snail
Bivalvia
 Pectinida - Pectinoidae
Chlamys hupeanus, "Zygochlamys aff. geminatus" = Zygochlamys geminata
Chlamys hupeanus Philippi 1887 scallop
"Zygochlamys aff. geminatus" = Zygochlamys geminata Sowerby 1846 scallop
 Ostreida - Pinnidae
 Mytilida - Mytilidae
Modiolus sp. Lamarck 1801 mussel
 Lucinida - Lucinidae
"Miltha promaucana" = Lucinoma promaucana
"Miltha promaucana" = Lucinoma promaucana Philippi 1877 clam
SUBSPECIES: M. promaucana cruzialis
 Cardiida - Veneridae
 Cardiida - Mactridae
 Cardiida - Lahillidae
Lahillia angulata Philippi 1887 clam
 Cardiida - Tellinidae
Tellina ovalleana tellin clam
 Hiatellida - Hiatellidae
Panopea sp. Menard 1807 clam
COMMENTS: Panopea spp.