NR 26: Maastrichtian - 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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Pseudopolymorphina aff. ligua
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| 1-5 specimens | ||||||||||
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Nodosariata
- Vaginulinida
- Vaginulinidae
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Palmula budensis rocanense
Bertels 1964
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| 1 specimen | ||||||||||
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Nodosariata
- Polymorphinida
- Polymorphinidae
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Polymorphina frondea
(Cushman 1922)
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| 1-5 specimens | ||||||||||
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Guttulina problema
(d'Orbigny 1826)
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| 1 specimen | ||||||||||
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Buliminidae
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Buliminella pulchra
(Terquem 1882)
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| 20-50 specimens | ||||||||||
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Globothalamea
- Rotaliida
- Discorbidae
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Discorbis aff. midwayensis
Cushman 1940
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| 100-200 specimens | ||||||||||
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Globothalamea
- Rotaliida
- Anomalinidae
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Anomalinoides acuta
(Plummer 1927)
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| 20-50 specimens | ||||||||||
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Globothalamea
- Rotaliida
- Nonionidae
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Protelphidium cf. hofkeri
Haynes 1956
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| 20-50 specimens | ||||||||||
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Protelphidium sublaeve
(Ten Dam 1944)
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| 50-100 specimens | ||||||||||
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Nonionella sp.
Cushman 1926
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| (Type A) 1 specimen, (Type B) 1 specimen | ||||||||||
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Nonionella jacksonensis
Cushman 1933
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| 1-5 specimens | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Rio Negro |
| Coordinates: | 39.7° South, 67.5° West (view map) | ||
| Paleocoordinates: | 42.1° South, 55.7° West |
Time
| Period: | Cretaceous - Paleogene | Epoch: | Late Cretaceous - Paleocene |
| Stage: | Maastrichtian - Danian | 10 m.y. bin: | Cretaceous 8 - Cenozoic 1 |
| Key time interval: | Maastrichtian - Danian | ||
| Age range of interval: | 72.1 - 61.6 m.y. ago |
Lithology and environment
| Primary lithology: | unlithified argillaceous,sandy claystone |
| Lithology description: The sediments are formed by clays, marls, clayey limestones, sandy, sometimes somewhat sandy, with variable proportions of gypsum and limestones microcoquinoids, varying their colour. res between orange, yellow, whitish and gray. | |
| Environment: | marine indet. |
| Geology comments: Existence of two facies: a deeper one and a coastal one. | |
Taphonomy
| Modes of preservation: | cast |
| Size of fossils: | microfossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 236488 | ||
| Authorizer: | E. Vlachos | Enterer: | M. Maldonado |
| Modifier: | M. Maldonado | Research group: | micropaleontology |
| Created: | 2024-10-04 14:06:15 | Last modified: | 2024-10-04 14:26:25 |
| Access level: | the public | Released: | 2024-10-04 14:06:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 86150. | A. Bertels. 1964. Micropaleontología del Paleoceno de General Roca (provincia de Río Negro). Revista del Museo de La Plata IV(23):125-184 [E. Vlachos/F. Aspromonte] |