Estacao Agronomica - Bed 8 (Estacao Lmst.): Early/Lower Miocene, Brazil
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda
- Turritellidae
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Turritella agronomica
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Turritella callizona
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Gastropoda
- Neogastropoda
- Turridae
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Turris albida
(Perry 1811)
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= Pleurotoma barretti
Guppy 1866
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Hendy et al. 2008 | |||||||||
recombined as Polystira barretti | ||||||||||
Gastropoda
- Neogastropoda
- Conidae
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Conus longesperatus n. sp.
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Close ally of: C. tortuosostriatus; complete specimen | ||||||||||
Bivalvia
- Pectinida
- Plicatulidae
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Plicatula eroessa
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Bivalvia
- Arcida
- Arcidae
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Scapharca ? melloi
Maury 1924
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recombined as Scapharca (Cunearca) melloi | ||||||||||
Bivalvia
- Cardiida
- Veneridae
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Clementia brasiliana n. sp.
Maury 1925
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synonym of Clementia (Clementia) dariena | ||||||||||
Callocardia sp.
Adams 1864
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Bivalvia
- Cardiida
- Cardiidae
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Cardium (Trachycardium) coutinhoi n. sp.
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original and current combination Trachycardium | ||||||||||
Resembles: C. paraense | ||||||||||
Bivalvia
- Cardiida
- Tellinidae
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Macoma cf. riopirabica
Maury 1924
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recombined as Macoma (Psammacoma) riopirabica | ||||||||||
Tellina penthesileae
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Bivalvia
- Cardiida
- Solecurtidae
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Psammosolen cereris
Maury 1924
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recombined as Solecurtus cereris | ||||||||||
Gymnolaemata
- Cheilostomata
- Lunulitidae
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Lunulites pileolus
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see common names |
Geography
Country: | Brazil | State/province: | Para |
Coordinates: | 1.0° South, 48.0° West (view map) | ||
Paleocoordinates: | 1.0° South, 43.9° West | ||
Basis of coordinate: | based on nearby landmark | ||
Altitude: | 1 meters | ||
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: | Pirabas | Member: | Estacao Limestone | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Collection from "bed 8" within the limestone unit. No description of the section is given so this collection cannot be placed in a stratigraphic framework. Fauna not very much like that of the Rio Pirabas outcrop, although many species are in common. Molluscan fauna indicate a Lower Miocene age. The deposit is stratigraphically near to the Pirabas Formation, but paleontological evidence is insufficient for an exact correlation. Maury (1924) suggested that it could be synchronous, slightly younger or slightly older. No specimens of Orthaulax have been ound in the fauna, suggesting a younger age, perhaps equivalent to the Gatun Fm. Simone (1994) does not illustrate any other Miocene units in the Parnaiba Basin other than the Pirabas Formation, for which I conclude the Estacao Limestone must now be considered a member of. The Pirabas Fm has a latest Late Oligocene to Middle Miocene age according text. Early Miocene in Vokes (1990), and is accordingly assigned to Early Miocene here. |
Lithology and environment
Primary lithology: | fine,shelly/skeletal,gray lithified calcareous "limestone" |
Includes fossils? | Y |
Lithology description: Fine-grained, light gray limestone. Otherwise fine-grained, generally grayish limestone, composed of finely ground sediments, including imperfectly preserved molluscan shells and bryozoan colonies. The limestone is highly calcareous. | |
Environment: | carbonate indet. |
Geology comments: No environmental data reported. |
Taphonomy
Modes of preservation: | body,cast,mold/impression |
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | selective quarrying,field collection |
Reason for describing collection: | taxonomic analysis |
Collection method comments: Artificial casts of the external molds were made. Collected by F. de Carvalho and Dr. Gonzaga for G. de Campos of the Brazil Geological Survey. Types are reposited at the Museum of the Brazil Geological Survey. | |
Taxonomic list comments:Fairly lengthy list, but possibly not exhaustive given the quality of the fauna. The nomenclature is antiquated, though has species-resolution assignments; identifications by Maury who had extensive knowledge of circum-Caribbean faunas. |
Metadata
Database number: | 60984 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2006-05-28 21:52:23 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2006-05-28 21:52:23 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
17560. | C. J. Maury. 1924. Fosseis Terciarios Do Brazil. Servico Geologico E Mineralogico Do Brazil Monographia 49 [A. Miller/A. Hendy/P. Wagner] |
Secondary references:
19909 | A. J. W. Hendy, D. P. Buick, K. V. Bulinski, C. A. Ferguson, and A. I. Miller. 2008. Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions. [A. Hendy/A. Hendy/A. Hendy] |