SJE5 - Puerto Madryn Fm: Late/Upper Miocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Arcida
- Arcidae
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Anadara (Rasia) bravardi
de Rio 1987
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Arca (Arca) particularis n. sp.
del Rio 1992
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Bivalvia
- Cardiida
- Veneridae
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Ameghinomya argentina
Ihering 1897
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del Rio 1994 | ||||||
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Dosinia (Dosinia) cuspidata n. sp.
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del Rio 1994 | ||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula (Nucula) semiundulata
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| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 44.5° South, 65.3° West (view map) |
| Paleocoordinates: | 44.7° South, 62.8° West |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Late/Upper Miocene | ||
| Age range of interval: | 11.63000 - 5.33300 m.y. ago |
Stratigraphy
| Formation: | Puerto Madryn | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Puerto Madryn Fm, which unconformably overlies the Gaiman Fm (Early Miocene). THICKNESS: From a 3 m thick bed within 44 m thick section. Formation reaches a maximum thickness of 150 m. AGE: Middle Miocene according to del Rio (1992) on the basis of generic affinities with Middle Miocene Caribbean faunas. Regarded as Late Miocene by del Rio (2004). STRATIGRAPHIC POSITION: From middle part of section. | |||||
Lithology and environment
| Primary lithology: | very fine,shelly/skeletal,gray,yellow unlithified silty sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Massive, yellowish, grey silty to very fine-grained sandstones with a rich and well preserved bivalve fauna. LITHIFICATION: Unlithified based on figured specimens and facies description. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Shallow marine tidal and subtidal environment with frequent storm processes superimposed. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Articulated whole bodies: | many |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: C. J. del Rio (between 1982 and 1987). REPORSITORY: CPBA; Universidad de Buenos Aires. Ciudad Universitaria, Pabellon II, Buenos Aires, Argentina. | |
| Taxonomic list comments:COVERAGE: Exhaustive for only bivalvia; other groups not discussed. NOMENCLATURE: Authoritative publication with modern nomenclature and species/subgenus resolution assignments. | |
Metadata
| Database number: | 71558 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-29 19:35:11 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2008-04-29 19:35:11 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 24178. | C. J. del Rio. 1992. Middle Miocene bivalves of the Puerto Madryn Formation, Valdes Peninsule, Chubut Province, Argentina (Nuculidae-Pectinidae): Part 1. Palaeontographica Abteilung A 225:1-58 [A. Hendy/A. Hendy] |
Secondary references:
| 24183 | C. J. del Rio. 1994. Middle Miocene bivalves of the Puerto Madryn Formation, Valdes Peninsule, Chubut Province, Argentina (Lucinidae-Pholadidae): Part 2. Palaeontographica Abteilung A 231:93-132 [A. Hendy/A. Hendy] |