PN1 - Puerto Madryn Fm: Late/Upper Miocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia
- Pectinida
- Pectinidae
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Argopecten gratus n. sp.
del Rio 1992
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Aequipecten paranensis
(d'Orbigny 1842)
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Bivalvia
- Lucinida
- Lucinidae
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Pteromyrtea danieli
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del Rio 1994 | ||||||
Bivalvia
- Cardiida
- Ungulinidae
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Felaniella vilardeboaena
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del Rio 1994 | ||||||
synonym of Diplodonta | |||||||
Bivalvia
- Cardiida
- Veneridae
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Ameghinomya meridionalis
Sowerby 1846
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del Rio 1994 | ||||||
Ameghinomya argentina
Ihering 1897
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del Rio 1994 | ||||||
Dosinia (Dosinia) meridionalis
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del Rio 1994 | ||||||
Dosinia (Dosinia) cuspidata n. sp.
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del Rio 1994 | ||||||
see common names |
Geography
Country: | Argentina |
Coordinates: | 42.1° South, 63.8° West (view map) |
Paleocoordinates: | 42.2° South, 61.4° 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 2 m thick bed within 22 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 very base of section. |
Lithology and environment
Primary lithology: | fine,shelly/skeletal,gray,yellow lithified sandstone |
Includes fossils? | Y |
Lithology description: SPECIFIC LITHOLOGY: Yellowish-gray fine-grained sandstones that yield a rich molluscan faunan. LITHIFICATION: Lithified based on facies description and adjacent strata. | |
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 |
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: | 71571 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
Created: | 2007-04-29 20:11:15 | Last modified: | 2013-11-25 13:37:23 |
Access level: | authorizer only | Released: | 2007-04-29 20:11:14 |
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] |