Ekelöf Point - Rabot Member of Santa Marta Formation - DJ.294.1: Campanian - Maastrichtian, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Dinophyceae
- Peridiniales
- Peridiniaceae
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Isabelidinium pellucidum
Lentin and Williams 1977
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Isabelidinium cretaceum
Lentin and Williams 1977
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Isabelidinium cf. ponticum
Marshall 1988
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Isabelidinium papillum
Sumner 1992
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Dinophyceae
- Peridiniales
- Protoperidiniaceae
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Phelodinium magnificum
Stover and Evitt 1978
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Phelodinium kozlowskii
Lindgren 1984
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Dinophyceae
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Spiniferites informal spp.
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Dinophyceae
- Gonyaulacales
- Gonyaulacaceae
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Oligosphaeridium informal sp. A
Davey and Williams 1966
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Dinophyceae
- Gonyaulacales
- Ceratiaceae
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Odontochitina operculata
Deflandre 1935
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Dinophyceae
- Gonyaulacales
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Tanyosphaeridium xanthiopyxides
Stover and Evitt 1978
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Geography
| Country: | Antarctica |
| Coordinates: | 64.2° South, 57.2° West (view map) |
| Paleocoordinates: | 62.1° South, 68.0° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Key time interval: | Campanian - Maastrichtian | ||
| Age range of interval: | 83.60000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Santa Marta | Member: | Rabot |
| Local order: | bottom to top |
| Stratigraphic resolution: | member |
Lithology and environment
| Primary lithology: | massive,planar lamination,gray lithified muddy,silty mudstone |
| Secondary lithology: | fine,medium lithified tuff |
| Lithology description: The sampled exposure at Ekelof Point consists of 34.5 m of massive to weakly laminated, grey, silty mudstones, punctuated by several beds (up to 20 cm thick) of fine to medium grained tuff, largely altered to yellow-grey clay. | |
| Environment: | marine indet. |
| Geology comments: Samples DJ.294.1-6 have a relatively high gonyaulacacean ratio accompanied by lower dominance, suggestingrelatively offshore conditions. Samples DJ.294.7-12 record a progressively reducing gonyaulacacean ratio and rising dominance values which may indicate a gradual reduction in distance from shore. There follows a
return to relatively offshore characteristics from DJ.294.13-17. | |
Taphonomy
| Modes of preservation: | body,soft parts,original sporopollenin |
| Size of fossils: | microfossils |
Collection methods and comments
| Collection excludes: | some microfossils |
| Collection methods: | bulk,chemical,hydrochloric,hydroflouric,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | BAS |
Metadata
| Database number: | 150959 | ||
| Authorizer: | C. Jaramillo | Enterer: | P. Santamarina |
| Modifier: | P. Santamarina | Research group: | micropaleontology |
| Created: | 2013-09-19 00:30:38 | Last modified: | 2013-09-18 09:49:37 |
| Access level: | authorizer only | Released: | 2018-09-19 00:30:38 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 48225. | P. W. Sumner. 1992. Dinoflagellate cysts from the Rabot Member (Santa Marta Formation) of eastern James Ross Island. Antarctic Science 4(3):305-310 [C. Jaramillo/P. Santamarina] |