Bed B - Los Pololos [Navidad Formation]: Early/Lower Miocene, Chile
collected by Covacevich & Frassinetti

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Nuculanida - Nuculanidae
Nuculana (Nuculana) informal sp. 2 Link 1807
Scaphopoda - Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander sp. Monfort 1810
Gastropoda - Neogastropoda - Turridae
Gemmula subaegualis
Gastropoda - Neogastropoda - Nassariidae
? Nassarius sp. Duméril 1806
Gastropoda - Naticidae
Polinices cf. medinae
Gastropoda - Turritellidae
Turritella breantiana
Gastropoda - Solariellidae
? Solariella sp. Wood 1842
see common names

Geography
Country:Chile
Coordinates: 33.9° South, 71.9° West (view map)
Paleocoordinates:34.8° South, 66.4° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
Key time interval:Early/Lower Miocene
Age range of interval:23.03000 - 15.97000 m.y. ago
Stratigraphy
Formation:Navidad
Stratigraphic resolution:bed
Stratigraphy comments: 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. Here, tentatively assigned to Early Miocene based on basal position with formation. STRATIGRAPHIC POSITION: From lower part of Navidad Fm.
Lithology and environment
Primary lithology:shelly/skeletal siltstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Fossiliferous siltstone. LITHIFICATION: Unknown.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Shallow marine, on the basis of faunal composition.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Collectors:Covacevich & Frassinetti
Collection method comments: COLLECTOR: Presumably V. Covacevich and D. Frassinetti. R, prior to 1980. REPOSITORY: SGO.
Taxonomic list comments:COVERAGE: Exhaustive for bivalvia and gastropoda. NOMENCLATURE: Authoritative publication, and with taxonomic assignments to species and subgenus resolution.
Metadata
Database number:78553
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2008-02-08 00:17:48 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2009-02-08 00:17:48
Creative Commons license:CC BY
Reference information

Primary reference:

26402. D. Frassinetti and V. Covacevich. 1981. Architectonicidae en la Formacion Navidad, Mioceno, Chile central. Parte 1. Heliacinae (Mollusca: Gastropoda). Revista Geológica de Chile 13-14:35-47 [A. Hendy/A. Hendy/A. Hendy]