Waypoint 13: Puerto Piramide: Tortonian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Pectinids indet.
Gastropoda - Trochidae
Calliostoma sp. Swainson 1840
Bivalvia - Cardiida - Veneridae
Veneridae indet. Rafinesque 1815
Bivalvia - Mytilida - Mytilidae
Mytilus sp. Linnaeus 1758
Bivalvia - Ostreida - Ostreidae
Ostrea alvarezi
Ostrea patagonica d'Orbigny 1842
recombined as Crassostrea patagonica
Rhynchonellata - Terebratulida - Terebratellidae
Pachymagas piramidesia
unclassified
Bryozoa indet. Ehrenberg 1831
Malacostraca - Decapoda - Aethridae
Osachila valdesensis Casadio et al. 2005
Malacostraca - Decapoda - Panopeidae
Panopeus piramidensis Casadio et al. 2005
Malacostraca - Decapoda - Cancridae
Romaleon parspinosus Casadio et al. 2005
Malacostraca - Decapoda - Geryonidae
Chaceon peruvianus (d'Orbigny 1842)
Malacostraca - Decapoda - Carcinidae
Proterocarcinus latus (Glaessner 1933)
original and current combination Archaeogeryon latus
Malacostraca - Decapoda - Epialtidae
Rochinia boschii Casadio et al. 2005
recombined as Scyramathia boschii
Thecostraca - Balanomorpha - Balanidae
Balanus sp. sensu lato Da Costa 1778
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 42.6° South, 64.3° West (view map)
Paleocoordinates:42.8° South, 61.6° West
Basis of coordinate:stated in text
Time
Period:Neogene Epoch:Miocene
Stage:Tortonian 10 m.y. bin:Cenozoic 6
Key time interval:Tortonian
Age range of interval:11.63000 - 7.24600 m.y. ago
Stratigraphy
Formation:Puerto Madryn
Stratigraphy comments: More recently Scasso et al. (2001) used 87Sr/86Sr dating to refer the Puerto Madryn Formation to the earliest late Miocene (middle Tortonian, 10 ± 0.3 Ma). These values are close to those reported by Zinsmeister et al. (1981), who published a 40K/40Ar age of 9.4 Ma for the uppermost beds of this unit.
Lithology and environment
Primary lithology:fine lithified sandstone
Secondary lithology: lithified mudstone
Includes fossils?Y
Environment:offshore ramp
Taphonomy
Modes of preservation:body,trace,original aragonite,original chitin
Size of fossils:macrofossils,microfossils
Preservation of anatomical detail:good
Abundance in sediment:common
Articulated whole bodies:some
Associated major elements:some
Disassociated major elements:many
Temporal resolution:snapshot
Spatial resolution:autochthonous
Collection methods and comments
Collection excludes:some macrofossils,some microfossils,difficult macrofossils,ichnofossils
Collection methods:surface (in situ),mechanical,field collection
Reason for describing collection:paleoecologic analysis
Museum repositories:USNM
Collection method comments: MPEF-PI: Museo Paleontologico Egidio Feruglio, Trelew, Chubut, Argentina
Metadata
Database number:56992
Authorizer:C. Schweitzer Enterer:C. Schweitzer
Modifier:M. Clapham Research group:decapod,marine invertebrate
Created:2005-11-30 10:28:05 Last modified:2017-04-04 22:12:30
Access level:the public Released:2005-11-30 10:28:05
Creative Commons license:CC BY
Reference information

Primary reference:
15369.decapod S. Casadio, R. M. Feldmann, A. Parras and C. E. Schweitzer. 2005. Miocene fossil Decapoda (Crustacea: Brachyura) from Patagonia, Argentina, and their paleoecological setting. Annals of Carnegie Museum 74(3):151-188 [C. Schweitzer/C. Schweitzer]