Loc. 3 [Guadal Formation] (Miocene of Chile)

Where: Chile (47.0° S, 72.4° W: paleocoordinates 47.9° S, 66.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Guadal Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Guadal Fm, which is overlain by the Galera Fm (Early-Middle Miocene). AGE: Late Oligocene-Early Miocene in text. Composition of the fauna reveals close similarity with those of the Patagoniano, and in particular the Monte Leon Fm. An Early Miocene age could be moe precise on the basis of sequence stratigraphic events. Early Miocene is assigned here. STRATIGRAPHIC POSITION: From upper part of the Guadal Formation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray sandstone

• ENVIRONMENT: Siliciclastic, and not particularly shallow (i.e. lower inner-middle shelf) based on faunal compisition.
• SPECIFIC LITHOLOGY: Dark gray sandstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Frassinetti & Covacevich in 1986-1988

Collection methods: surface (in situ),

• COLLECTOR: Presumably Frassinetti, C., and Covacevich, C. (1986-1988). REPOSITORY: Museo Nacional de Historia Natural, Santiago, Chile

Primary reference: D. Frassinetti and V. Covacevich. 1999. Invertibrados fósiles marinos de la Formación Guadal (Oligoceno superio-Mioceno inferior) en Pampa, Castillo region, región de Aisén, Chile. Servico Nacional de Geologia y Mineria Chile Boletin 51:1-96 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 78427: authorized by Austin Hendy, entered by Austin Hendy on 06.02.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia, anthozoa, bryozoa, brachiopoda, annelida, arthropoda, and echinodermata. NOMENCLATURE: Authoritative publication with taxonomic assignments to species-resolution.
Anthozoa
 Scleractinia - Flabellidae
Flabellum aequalis stony coral
Echinoidea
 Spatangoida - Schizasteridae
Gastropoda
 Trochoidea - Trochidae
Trochus laevis Sowerby 1846 top snail
 Cerithioidea - Turritellidae
Turritella ambulacrum Sowerby 1846 turret shell
 Sorbeoconcha - Vermetidae
Serpulorbis sp. Sasso 1827 worm shell
 Neogastropoda - Volutidae
? Adelomelon burmeister, "Proscaphella "sp. 3"" = Miomelon
"Proscaphella "sp. 3"" = Miomelon Dall 1907 volute
 Neogastropoda - Fasciolariidae
Taioma cf. tricarinata Finlay and Marwick 1937 snail
 Sorbeoconcha - Ficidae
Ficus carolinae fig shell
 Sorbeoconcha - Struthiolariidae
Struthiolarella ameghinoi Ihering 1897 snail
 Sorbeoconcha - Cassidae
Semicassis ovulum Ortmann 1900 snail
 Sorbeoconcha - Naticidae
Naticidae indet. Guilding 1834 moon snail
Bivalvia
 Carditida - Crassatellidae
Crassatella cf. longior Ihering 1897 clam
 Carditida - Carditidae
Cardiocardita inaequalis Philippi 1887 clam
Pleuromeris elegantoides Ortman 1902 clam
 Cardiida - Veneridae
Chione argentina venus clam
"Chione cf. meridionalis" = Chione (Chione) compta meridionalis Oldroyd 1921 venus clam
 Cardiida - Cardiidae
Trachycardium puelchum Sowerby 1846 cockle
Patagonicardium iheringi Frassinetti and Covacevich 1999 cockle
 Mytilida - Mytilidae
Modiolus cf. ameghinoi Ihering 1907 mussel
 Arcida - Cucullaeidae
Cucullaea alta Sowerby 1846 clam
 Arcida - Limopsidae
Limopsis insolita Sowerby 1846 clam
 Ostreida - Pinnidae
 Pectinida - Pectinoidae
""Chlamys" centralis" = Jorgechlamys centralis
""Chlamys" centralis" = Jorgechlamys centralis Sowerby 1846 scallop
Rhynchonellata
 Terebratulida - Terebratellidae
Bryozoa
  -
Bryozoa sp. Ehrenberg 1831
Polychaeta
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
Malacostraca
 Decapoda - Carcinidae