Pedersen Formation - Lagrelius Point: Early/Lower Aptian, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Coniferales
- Podocarpaceae
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Callialasporites informal sp.
Sukh-Dev 1961
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Dinophyceae
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? Spiniferites ramosus
Lentin and Williams 1973
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Dinophyceae
- Pareodiniaceae
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Batioladinium micropodum
Eisenack and Cookson 1960
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Dinophyceae
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Diconodinium informal spp.
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Dinophyceae
- Gonyaulacales
- Gonyaulacaceae
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? Cribroperidinium edwardsii
Davey 1969
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Oligosphaeridium complex
Davey and Williams 1966
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Oligosphaeridium pulcherrimum
Davey and Williams 1966
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Dinophyceae
- Gonyaulacales
- Ceratiaceae
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Odontochitina informal spp.
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? Odontochitina informal spp.
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Muderongia australis
Helby 1987
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| see common names | |||||||
Geography
| Country: | Antarctica |
| Coordinates: | 63.9° South, 58.3° West (view map) |
| Paleocoordinates: | 59.9° South, 46.0° West |
| Basis of coordinate: | based on nearby landmark |
| Altitude: | 97 |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Barremian | ||
| Key time interval: | Early/Lower Aptian | ||
| Age range of interval: | 121.40000 - 119.50000 m.y. ago |
Stratigraphy
| Formation: | Pedersen |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | lithified conglomeratic conglomerate |
| Secondary lithology: | lithified argillaceous mudstone |
| Lithology description: Comprises conglomerate-dominated successions exposed on Pedersen Nunatak and the southern Sobral Peninsula. In the northern Sobral Peninsula, conglomerates, mudstones and sandstones of thePedersen Formation occur in faulted contact with the underlying Nordenskjo¨ ld Formation. The Pedersen Formation is thought to be laterally equivalent to the Lagrelius Point Formation exposed on north-western James Ross Island. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body,soft parts,original sporopollenin |
| Size of fossils: | microfossils |
| Temporal resolution: | time-averaged |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection excludes: | all macrofossils,some microfossils |
| Collection methods: | bulk,chemical,hydrochloric,hydroflouric,field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 150202 | ||
| Authorizer: | C. Jaramillo | Enterer: | P. Santamarina |
| Modifier: | P. Santamarina | Research group: | marine invertebrate,micropaleontology |
| Created: | 2013-09-04 01:14:09 | Last modified: | 2013-09-03 10:17:04 |
| Access level: | authorizer only | Released: | 2018-09-04 01:14:09 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 48062. | J. B. Riding and J. A. Crame. 2002. Aptian to Coniacian (Early–Late Cretaceous) palynostratigraphy of the Gustav Group, James Ross Basin, Antarctica. Cretaceous Research (23)739-760 [C. Jaramillo/P. Santamarina] |