Monte Leon Fm - Monte Entrada: Early/Lower Miocene, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neogastropoda
- Volutomitridae
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Neoimbricaria patagonica
(Ihering 1897)
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| see common names | |||||||
Geography
| Country: | Argentina |
| Coordinates: | 50.1° South, 68.4° West (view map) |
| Paleocoordinates: | 50.9° South, 61.7° West |
| Basis of coordinate: | based on nearby landmark |
| 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: | Monte Leon | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Monte Leon Fm, which is unconformably overlain by the Santa Cruz Fm (Late Miocene) and unconformably overlies the San Julian Fm (Early Oligocene). AGE: Stated in text to be Oligocene in age. Recent chronostratigraphic revision by Del Rio (2004) places the Monte Leon Fm in the Early Miocene. STRATIGRAPHIC POSITION: Upper levels of the Monte Leon Fm. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal unlithified "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Unknown lithology, assumed to be siliciclastic based on general regional geology and preservation of specimens. Highly fossiliferous. LITHIFICATION: Unlithified, assumed based on observations of figured specimens in Olivero and Camacho (1990) and Del Rio (2004). | |
| Environment: | marine indet. |
| Glacial or sequence phase: | transgressive |
| Geology comments: ENVIRONMENT: No environmental data reported in text, assumed to be shelfal, but not shallow water. From transgressive unit. | |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | concentrated |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: COLLECTOR: A. M. Oliveras and H. H. Camacho (1988). REPOSITORY: Catedra de Paleontologia de la Universidad de Buenos Aires (CPBA). | |
| Taxonomic list comments:COVERAGE: Olivero and Camacho (1990) only list individual taxonomic group. Subsequent publications (Del Rio 2004) provide exhaustive coverage of bivalvia and gastropoda. NOMENCLATURE: Authoritative publication with modern nomenclature and species-level designations. | |
Metadata
| Database number: | 66153 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-10-02 18:34:35 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | group members | Released: | 2007-10-02 18:34:35 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 18950. | A. M. Olivera and H. H. Camacho. 1990. Revision del genero Neoimbricaria Ihering, 1907 (Gastropoda, Neogastropoda) del Oligoceno de la Argentina. Anales de la Academia Nacional de Ciencias Exactas, Físicas y Naturales, Buenos Aires 42:225-235 [A. Hendy/A. Hendy/J. Alroy] |