Sierra Blanca locality: Danian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Nodosariata
- Polymorphinida
- Polymorphinidae
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Globulina laevigata
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Mailhe et al. 1967 | |||||||||
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Globothalamea
- Rotaliida
- Anomalinidae
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Anomalinoides anamarie
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Mailhe et al. 1967 | |||||||||
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Dinophyceae
- Peridiniales
- Peridiniaceae
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Trithyrodinium verrucosum
(Heisecke 1970)
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1 specimen | |||||||||
| MACN 429 | ||||||||||
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Nodosariata
- Vaginulinida
- Vaginulinidae
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Lenticulina informal sp. 1
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Mailhe et al. 1967 | |||||||||
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Lenticulina informal sp. 3
|
Mailhe et al. 1967 | |||||||||
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Nodosariata
- Polymorphinida
- Polymorphinidae
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Polymorphina informal sp.
d'Orbigny 1826
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Mailhe et al. 1967 | |||||||||
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Globulina inaequalis
Reuss 1850
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Mailhe et al. 1967 | |||||||||
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Globulina gibba
d'Orbigny 1832
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Mailhe et al. 1967 | |||||||||
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Nodosariata
- Nodosariida
- Nodosariidae
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Lagena hispida
Reuss 1863
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Mailhe et al. 1967 | |||||||||
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Globigerinidae
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Globoconusa daubjergensis
(Bronnimann 1953)
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Mailhe et al. 1967 | |||||||||
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Globothalamea
- Rotaliida
- Discorbidae
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Discorbis informal sp.
Lamarck 1804
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Mailhe et al. 1967 | |||||||||
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Globothalamea
- Rotaliida
- Cibicididae
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Planulina camachoi
Bertels 1964
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Mailhe et al. 1967 | |||||||||
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Cibicides vulgaris
(Plummer 1927)
|
Mailhe et al. 1967 | |||||||||
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Cibicides alleni
(Plummer 1927)
|
Mailhe et al. 1967 | |||||||||
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Lituolida
- Lituolidae
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Bolivinopsis capitata
Yakolev 1891
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Mailhe et al. 1967 | |||||||||
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Textularia informal sp. 1
|
Mailhe et al. 1967 | |||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Neuquén |
| Coordinates: | 38.2° South, 68.4° West (view map) | ||
| Paleocoordinates: | 40.7° South, 56.8° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| Stage: | Danian | 10 m.y. bin: | Cenozoic 1 |
| Key time interval: | Danian | ||
| Age range of interval: | 66 - 61.6 m.y. ago |
Stratigraphy
| Formation: | Roca | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The age of the Roca Formation section (Cerro Caracol and Sierra Blanca localities) was assigned to the Danian based on the record of the foraminifera species Globoconusa daubjergensis and Turborotalia pseudobulloides Plummer, 1927 (Mailhe et al., 1967). | |||||
Lithology and environment
| Primary lithology: | gray lithified claystone |
| Secondary lithology: | gypsiferous,tuffaceous mudstone |
| Includes fossils? | Y |
| Lithology description: Deposits of the Roca Formation herein analyzed crop out near the Barranca del Palo (Cerro Caracol and Sierra Blanca localities), in the eastern Neuquén Province and consists of grey claystones, mudstone, with variations in the silt and sand fractions, as well as variable proportions of gypsum and tuffaceous sediments (Mailhe et al., 1967; Heisecke et al., 1970). | |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | microfossils |
| Preservation of anatomical detail: | medium |
| Articulated whole bodies: | none |
| Associated major elements: | none |
| Disassociated major elements: | none |
| Disassociated minor elements: | all |
| Fragmentation: | occasional |
| Bioerosion: | none |
| Encrustation: | none |
Collection methods and comments
| Collection excludes: | all microfossils |
| Collection methods: | selective quarrying,mechanical,hydrochloric,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | MACN |
| Collection method comments: These slides have been deposited at the División Paleobotánica del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN) under repository numbers 429.
Specimens of the Roca Formation were observed under an Olympus BX53 binocular microscope, and photomicrographs were taken with an Olympus DP26 camera. | |
Metadata
| Also known as: | Sample MH6 and MH2 | ||
| Database number: | 234983 | ||
| Authorizer: | E. Vlachos | Enterer: | F. Aspromonte, A. Pasini |
| Modifier: | F. Aspromonte | Research group: | micropaleontology |
| Created: | 2024-05-27 20:07:51 | Last modified: | 2024-08-30 12:18:21 |
| Access level: | the public | Released: | 2024-05-27 20:07:51 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 88512. | M. S. González Estebenet and M. V. Guler. 2023. Trithyrodinium verrucosum (Heisecke, 1970) comb. nov., emend: Early Paleogene (Danian) dinoflagellate cyst species from the north of Patagonia, Argentina. Regional stratigraphic and paleoenvironmental relevance. Ameghiniana 60(6):509-521 [E. Vlachos/F. Aspromonte] |
Secondary references:
| 86163 | A. R. Mailhe, N. Malumián, and A. C. Riccardi. 1967. Contribución al conocimiento de los foraminíferos del Rocanense de la Cuenca de Añelo (provincia de Neuquén). Ameghiniana V(1):21-33 [E. Vlachos/F. Aspromonte] |