Left bank of Rio Foyel: Early/Lower Miocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
|
|||||||
informal vertebrate remains indet.
|
|||||||
Malacostraca
- Decapoda
- Varunidae
|
|||||||
Asthenognathus microspinus n. sp.
Casadio et al. 2004
|
|||||||
Malacostraca
- Decapoda
- Trichopeltariidae
|
|||||||
Trichopeltarion levis n. sp.
Casadio et al. 2004
|
|||||||
Malacostraca
- Decapoda
- Tumidocarcinidae
|
|||||||
Baricarcinus mariae n. gen., n. sp.
Casadio et al. 2004
|
|||||||
Malacostraca
- Decapoda
- Carcinidae
|
|||||||
Proterocarcinus corsolini n. sp.
Casadio et al. 2004
|
|||||||
Malacostraca
- Decapoda
- Munididae
|
|||||||
Munida casadioi
(Schweitzer and Feldmann 2000)
|
|||||||
original and current combination Austromunida casadioi | |||||||
Malacostraca
- Decapoda
- Ctenochelidae
|
|||||||
Callianopsis australis n. sp.
Casadio et al. 2004
|
|||||||
Gastropoda
- Turritellidae
|
|||||||
Turritella sp.
Lamarck 1799
|
|||||||
Gastropoda
- Neogastropoda
- Fasciolariidae
|
|||||||
Fusinus sp.
Rafinesque 1815
|
|||||||
Bivalvia
- Nuculanida
- Malletiidae
|
|||||||
Neilo sp.
Adams 1854
|
|||||||
Bivalvia
- Nuculida
- Nuculidae
|
|||||||
Nucula sp.
Lamarck 1799
|
|||||||
Bivalvia
- Mytilida
- Mytilidae
|
|||||||
Brachidontes sp.
Swainson 1840
|
|||||||
Bivalvia
- Ostreida
- Pinnidae
|
|||||||
Atrina sp.
Gray 1842
|
|||||||
Bivalvia
- Pectinida
- Pectinidae
|
|||||||
Zygochlamys sp.
Ihering 1907
|
|||||||
Bivalvia
- Arcida
- Cucullaeidae
|
|||||||
Cucullaea sp.
Lamarck 1801
|
|||||||
Bivalvia
- Cardiida
- Veneridae
|
|||||||
Dosinia sp.
Scopoli 1777
|
|||||||
Bivalvia
- Hiatellida
- Hiatellidae
|
|||||||
Panopea nucleus
(Ihering 1899)
|
|||||||
Echinoidea
- Spatangoida
- Schizasteridae
|
|||||||
? Schizaster sp.
Agassiz 1835
|
|||||||
Anthozoa
- Scleractinia
- Flabellidae
|
|||||||
Flabellum sp.
Lesson 1831
|
|||||||
unclassified
|
|||||||
Thalassinoides sp.
Ehrenberg 1944
|
|||||||
see common names |
Geography
Country: | Argentina | State/province: | Rio Negro |
Coordinates: | 41.7° South, 71.5° West (view map) | ||
Paleocoordinates: | 42.6° South, 65.5° West | ||
Basis of coordinate: | stated in text | ||
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 - 15.98000 m.y. ago |
Stratigraphy
Formation: | Rio Foyel | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: According to Bechis et al., 2014: New U-Pb LA-ICPMS geochronology undertaken on detrital zircons gave a maximum age of 21 Ma for the fossil-bearing marine sandstone. In addition, a crystalline tuff intercalated in the middle section of the unit in the nearby Palenque stream gave a U-Pb LA-ICPMS zircon age of 16.6±0.5 Ma. These data represent the first geochronological constraints for these marine beds, which are then comprised between 21 and 16 Ma. Considering the joint presence of the Reticulofenestra haqii and Helicosphaera euphratis in the Rio Foyel, this section can be assigned to NN2-NN4 (Martini, 1971), Early to Middle Miocene, Aquitanian- Langhian. |
Lithology and environment
Primary lithology: | concretionary lithified "shale" |
Includes fossils? | Y |
Lithology description: "alternate beds of massive shale and concretions with irregular contact surfaces. The shales are up to 5.5 m thick and contain isolated subspherical concretions of different sizes. In some beds they are finely laminated, although the original stratification is probably diagenetically erased. The concetionary beds are up to 5 m thick and yield abundant concretions of different shapes (spherical, ovate and tubular) and sizes (0.5-20 cm diameter). | |
Environment: | offshore |
Taphonomy
Modes of preservation: | body,concretion |
Size of fossils: | macrofossils |
Articulated whole bodies: | many |
Associated major elements: | many |
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | surface (float),surface (in situ),mechanical,field collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | CM |
Collection method comments: Other repositories are GHUNLPam and MSNM. |
Metadata
Database number: | 45689 | ||
Authorizer: | C. Schweitzer | Enterer: | C. Schweitzer |
Modifier: | M. Clapham | Research group: | decapod,marine invertebrate |
Created: | 2004-11-24 09:20:04 | Last modified: | 2017-05-23 16:34:15 |
Access level: | the public | Released: | 2004-11-24 09:20:04 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
12063. | S. Casadio, A. De Angeli, R. M. Feldmann, A. Garassino, J. L. Hetler, A. Parras, and C. E. Schweitzer. 2004. New decapod crustaceans (Thalassinidea, Galatheoidea, Brachyura) from the Middle Oligocene of Patagonia, Argentina. Annals of Carnegie Museum 73(2):25-47 [C. Schweitzer/C. Schweitzer/M. Uhen] |