6228: Aptian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Equisetopsida
- Araucariaceae
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Cyclusphaera psilata
Volkheimer and Sepulveda 1976
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Polypodiopsida
- Polypodiaceae
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Trichotomosulcites microsaccatus
Schrank 2010
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| see common names | |||||||
Geography
| Country: | Argentina | State/province: | Santa Cruz | County: | Estancia Bajo Tigre |
| Coordinates: | 48.5° South, 69.1° West (view map) | ||||
| Paleocoordinates: | 49.4° South, 35.3° West |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Aptian | 10 m.y. bin: | Cretaceous 3 |
| Key time interval: | Aptian | ||
| Age range of interval: | 121.40000 - 113.00000 m.y. ago | ||
| Age estimate: | 118.56 ± 1.4 Ma (U/Pb) |
Stratigraphy
| Geological group: | Baqueró | Formation: | Anfiteatro de Ticó | ||
| Local section: | BA Pal 6228 | Local bed: | 44 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The collection is 12 m below the dated horizon. | |||||
Lithology and environment
| Primary lithology: | lithified conglomeratic conglomerate | ||
| Includes fossils? | Y | ||
| Environment: | fluvial-lacustrine indet. | Tectonic setting: | volcanic basin |
| Geology comments: High sinuosity rivers (Facies Association E of Limarino et al., 2012) | |||
Taphonomy
| Modes of preservation: | soft parts,original sporopollenin |
| Size of fossils: | microfossils |
| Preservation of anatomical detail: | excellent |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | bulk,chemical,hydrochloric,hydroflouric,field collection |
| Collection size: | 2 specimens |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | MACN |
Metadata
| Database number: | 223330 | ||
| Authorizer: | P. Narvaez | Enterer: | P. Narvaez | Research group: | micropaleontology,paleobotany |
| Created: | 2021-11-08 14:54:49 | Last modified: | 2021-11-08 14:54:49 |
| Access level: | authorizer only | Released: | 2026-11-08 14:54:49 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 78456. | V.S. Perez Loinaze and M. Llorens. 2018. Palynology of the Baquero Group (upper Aptian), Patagonia Argentina: An integrated study. Cretaceous Research 86:219-237 [P. Narvaez/P. Narvaez/P. Narvaez] |