Río Foyel Fm (from González Bonorino, 1944): Early/Lower Oligocene, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Turritellidae
Turritella ambulacrum Sowerby 1846
González Bonorino 1944
Gastropoda - Naticidae
Natica sp. Scopoli 1777
González Bonorino 1944
Gastropoda - Neogastropoda - Volutidae
Voluta triplicata Sowerby 1846
González Bonorino 1944
    = Proscaphella triplicata Sowerby 1846
Chiesa and Camacho 2001
recombined as Palaeomelon triplicata
Bivalvia - Cardiida - Cardiidae
Cardium patagonicum Ihering 1907
González Bonorino 1944
recombined as Hedecardium (Iheringicardium) patagonicum
Cardium philippi Ihering 1897
González Bonorino 1944
    = Patagonicardium philippi
Chiesa and Camacho 2001
Bivalvia - Cardiida - Mactridae
Lutraria sp. Lamarck 1799
González Bonorino 1944
Bivalvia - Hiatellida - Hiatellidae
Panopea sierrana
González Bonorino 1944
Panopea nucleus (Ihering 1899)
González Bonorino 1944
Bivalvia - Lucinida - Lucinidae
Phacoides promaucana (Philippi 1877)
González Bonorino 1944
    = Miltha promaucana Philippi 1877
Chiesa and Camacho 2001
recombined as Lucinoma promaucana
Phacoides ortmanni (Ihering 1899)
González Bonorino 1944
original and current combination Lucina ortmanni
see common names

Geography
Country:Argentina
Coordinates: 41.7° South, 71.4° West (view map)
Paleocoordinates:43.6° South, 63.1° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Early/Lower Oligocene
Age range of interval:33.90000 - 27.82000 m.y. ago
Stratigraphy
Formation:Rio Foyel
Stratigraphic resolution:bed
Stratigraphy comments: 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.
Lithology and environment
Primary lithology: lithified sandy,calcareous "shale"
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Massive to finely bedded shale with calcareous sandstone beds. LITHIFICATION: Presumably lithified, based on age and facies (concretions and calcarenites
Environment:offshore
Geology comments: ENVIRONMENT: Offshore, siliciclastic setting.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Collection method comments: COLLECTOR: Unknown collector, possibly González Bonorino (c. 1940's). REPOSITORY: Unknown; some described material is reposited at CIRGEO (unknown location).
Taxonomic list comments:COVERAGE; Exhaustive for brachiopods, bivalves, and gastropods. NOMENCLATURE: Authoritative publication, using fairly modern nomenclature and species-level assignments.
Metadata
Database number:71597
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2007-04-30 17:27:57 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2008-04-30 17:27:57
Creative Commons license:CC BY
Reference information

Primary reference:
24191. 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]

Secondary references:

24195 F. González Bonorino. 1944. Descripción geológica y petrográfica de la Hoja 41b "Río Foyel" (Terr. Rio Negro). Boletín de la Derección de Minas, Geología e Hidrología 56:19-21 [A. Hendy/A. Hendy/A. Hendy]