Hidden Lake B13: Coniacian - Early/Lower Santonian, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Nyssapollenties spp. microspore
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Dryadopollis informal sp.1 microspore
Srivastava 1977
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Angiospermae
- Proteales
- Proteaceae
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Proteacidites informal sp.1 microspore
Cookson and Couper 1953
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Proteacidites informal sp.2 microspore
Cookson and Couper 1953
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Magnoliopsida
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Tricolporites informal sp.1 microspore
Cookson 1947
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Coniferales
- Podocarpaceae
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Phyllocladidites mawsonii microspore
Cookson 1947
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Microcachryidites antarcticus microspore
Couper 1953
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Lycopodiopsida
- Selaginellales
- Selaginellaceae
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Herkosporites elliottii microspore
Stover 1973
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Lycopodiopsida
- Selaginellales
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Densoisporites velatus microspore
Dettmann 1963
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Polypodiopsida
- Dicksoniaceae
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Cyatheacidites annulatus microspore
Cookson 1947
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Polypodiopsida
- Osmundaceae
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Rugulatisporites mallatus microspore
Stover 1973
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Polypodiopsida
- Gleicheniaceae
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Ornamentifera informal sp. A microspore
Bolkhovitina 1966
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Clavifera triplex microspore
Bolkhovitina 1966
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Pteridopsida
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Ischyosporites volkheimeri microspore
Filatoff 1975
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Dinophyceae
- Gonyaulacales
- Gonyaulacaceae
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Chytroeisphaeridia baetica marine palyn
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Dinophyceae
- Gonyaulacales
- Ceratiaceae
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Xenascus spp. marine palyn
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Dinophyceae
- Peridiniales
- Peridiniaceae
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Trithyrodinium informal sp.2 marine palyn
Drugg
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Palaeohystrichophora infusorioides marine palyn
Deflandre 1936
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see common names |
Geography
Country: | Antarctica |
Coordinates: | 63.9° South, 58.0° West (view map) |
Paleocoordinates: | 65.2° South, 61.9° West |
Basis of coordinate: | estimated from map |
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
10 m.y. bin: | Cretaceous 6 | ||
Key time interval: | Coniacian - Early/Lower Santonian | Pollen zone: | Phyllocladidites mawsonii |
Age range of interval: | 89.80000 - 83.60000 m.y. ago |
Stratigraphy
Geological group: | Gustav | Formation: | Hidden Lake | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: The Hidden Lake Formation is considered Coniacian-Early Santonian in age taking into account the recognition of the Australian, Phyllocladidites mawsonii spore-pollen Zone and Conosphaeridium striatoconus and Odontochitina porifera dinoflagellate cyst Zones. The associate megafauna confirms this age. |
Lithology and environment
Primary lithology: | calcareous,carbonaceous sandstone |
Includes fossils? | Y |
Lithology description: La base grada desde areniscas gruesas a conglomerados finos a medianos con intercalaciones de bancos de areniscas con alto porcentaje de material volcaniclástico. Hacia arriba disminuye la granulometría, predominando las areniscas finas limosas muy bioturbadas. La estratificación entrecruzada en artesada y la gradación normal son las estructuras mas importantes. | |
Environment: | delta plain |
Geology comments: "a developing distributary plain in the central fan of a fan delta depositional system", also called "nearshore marine" |
Taphonomy
Modes of preservation: | original sporopollenin |
Size of fossils: | microfossils |
Fragmentation: | occasional |
Spatial resolution: | autochthonous |
Collection methods and comments
Collection methods: | surface (in situ),hydrochloric,hydroflouric,field collection |
Reason for describing collection: | biostratigraphic analysis |
Collection method comments: Los preparados se encuentran depositados en la palinoteca del Centro de Investigaciones en Recursos Geológicos bajo la sigla CIRGEO Palin y los números de catálogo 1053 a 1124. | |
Taxonomic list comments:A partir de la muestra B13 se reconoce una asociación esporopolínica variada, pero con algunas presencias significativas como la de Rugulatisporites mallatus y Tricolporites sp. 1, primero con apariciones saltuarias pero luego documentándose regularmente hacia la parte superior de la Formación Hidden Lake y la base de la Formación Santa Marta. |
Metadata
Also known as: | Hidden Lake | ||
Database number: | 169329 | ||
Authorizer: | C. Jaramillo | Enterer: | C. Jaramillo | Research group: | micropaleontology |
Created: | 2015-05-19 20:10:22 | Last modified: | 2015-05-19 20:10:22 |
Access level: | the public | Released: | 2015-05-19 20:10:22 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
55274. | fossil record | V. D. Barreda, S. Palamarczuk, and F. Medina. 1999. Palinología de la Formación Hidden Lake (Coniaciano-Santoniano), Isla James Ross, Antártida. Revista Española de Micropaleontología (31)53-72 [C. Jaramillo/C. Jaramillo] |