6231: Aptian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Viretrisporites signatus
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Jusinghipollis ticoensis
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Lycopodiopsida
- Selaginellales
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Ceratosporites equalis
Cookson and Dettmann 1958
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Densoisporites velatus
Dettmann 1963
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Angiospermae
- Chloranthales
- Chloranthaceae
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Clavatipollenites sp.
Couper 1958
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| Clavatipollenites sp. 2 in Archangelsky and Archangeslky 2013 | ||||||||||
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Coniferales
- Podocarpaceae
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Gamerroites sp.
Archangelsky 1988
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| Gamerroites sp. cf. G. psilasaccus | ||||||||||
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Callialasporites trilobatus
(Balme 1957)
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| original and current combination Tsugaepollenites trilobatus | ||||||||||
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Podocarpidites ellipticus
Cookson 1947
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Microcachrydites antarcticus
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Equisetopsida
- Cheirolepidiaceae
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Classopollis triangulatus
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Classopollis classoides
Pflug 1953
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Classopollis simplex
Reiser and Williams 1969
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Equisetopsida
- Araucariaceae
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Balmeiopsis limbatus
(Balme 1957)
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| original and current combination Inaperturopollenites limbatus | ||||||||||
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Cyclusphaera annularis n. sp.
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Cyclusphaera punnulosa
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Cyclusphaera psilata
Volkheimer and Sepulveda 1976
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Algae
- Zygnemataceae
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Ovoidites parvus
Nakoman 1966
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Polypodiopsida
- Schizaeales
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Ruffordiaspora australiensis
Dettmann and Clifford 1992
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Plicatella baqueroensis
Davies 1985
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Polypodiopsida
- Polypodiaceae
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Trichotomosulcites microsaccatus
Schrank 2010
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Polypodiopsida
- Gleicheniaceae
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Gleicheniidites senonicus
Ross 1949
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Polypodiopsida
- Dicksoniaceae
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Cyatheacidites tectifera
Archangelsky and Gamerro 1965
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unclassified
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Chomotriletes minor
Pocock 1970
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| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Santa Cruz | County: | Anfiteatro de Ticó |
| Coordinates: | 48.5° South, 69.2° West (view map) | ||||
| Paleocoordinates: | 49.4° South, 35.4° 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 6231 | Local bed: | 50 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The collection is 6 m below the dated horizon. | |||||
Lithology and environment
| Primary lithology: | lithified silty "shale" | ||
| 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: | 23 specimens |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | MACN |
Metadata
| Database number: | 223086 | ||
| Authorizer: | P. Narvaez | Enterer: | P. Narvaez | Research group: | micropaleontology,paleobotany |
| Created: | 2021-11-03 17:13:46 | Last modified: | 2021-11-03 17:13:46 |
| Access level: | authorizer only | Released: | 2026-11-03 17:13:46 |
| 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] |