Loc. 5 [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 78429: 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.
Gastropoda
 Trochoidea - Trochidae
"Gibbula" dalli Ihering 1897 top snail
 Neotaenioglossa - Calyptraeidae
Trochita sp. Schumacher 1817 slipper shell
 Cerithioidea - Turritellidae
Turritella ambulacrum Sowerby 1846 turret shell
 Sorbeoconcha - Struthiolariidae
Struthiolarella ameghinoi Ihering 1897 snail
 Neogastropoda - Muricidae
Trophon cf. patagonicus Sowerby 1846 murex snail
 Neogastropoda - Cancellariidae
Cancellaria sp. Lamarck 1799 snail
 Sorbeoconcha - Vermetidae
Serpulorbis sp. Sasso 1827 worm shell
Bivalvia
 Arcida - Cucullaeidae
Cucullaea alta Sowerby 1846 clam
 Pectinida - Pectinoidae
""Chlamys" centralis" = Jorgechlamys centralis
""Chlamys" centralis" = Jorgechlamys centralis Sowerby 1846 scallop
 Mytilida - Mytilidae
Brachidontes andinus Ortmann 1900 mussel
 Thraciida - Periplomatidae
Periploma sp. Schumacher 1816 clam
 Cardiida - Veneridae
? Eurhomalea navidadiformis Frassinetti and Covacevich 1999 venus clam
Chione argentina venus clam
Chione patagonica Philippi 1887 venus clam
 Cardiida - Cardiidae
Trachycardium puelchum Sowerby 1846 cockle
 Cardiida - Lahillidae
Lahillia sp. Cossmann 1899 clam
 Hiatellida - Hiatellidae
Panopea sp. Menard 1807 clam
Panopea nucleus Ihering 1899 clam
 Nuculanida - Malletiidae
Neilo ornata Sowerby 1846 clam
Rhynchonellata
 Terebratulida - Terebratellidae
Polychaeta
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758