Profile I; Layer 11 - Gazdzicki and Halina (1984): Pliocene, Antarctica
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Stenolaemata
- Cyclostomata
- Multisparsidae
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Idmonea sp.
Lamouroux 1821
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Stenolaemata
- Cyclostomata
- Tubuliporidae
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Tubulipora cf. phalangea
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Gymnolaemata
- Cheilostomata
- Cellariidae
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Cellaria cf. rigida
MacGillivray 1885
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Gymnolaemata
- Cheilostomata
- Microporellidae
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Microporella (Microporella) ciliata
(Pallas 1766)
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Fenestrulina malusii
(Audouin 1826)
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Gymnolaemata
- Cheilostomata
- Schizoporellidae
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Schizoporella cf. magniporosa
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Gymnolaemata
- Cheilostomata
- Cyclicoporidae
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Cyclicopora longipora
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Gymnolaemata
- Cheilostomata
- Electridae
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Tretosina sp.
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Gymnolaemata
- Cheilostomata
- Membraniporidae
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Discoporella sp.
d'Orbigny 1852
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Gymnolaemata
- Cheilostomata
- Hippothoidae
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Hippothoa cf. hyalina
(Linnaeus 1767)
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Gymnolaemata
- Cheilostomata
- Romancheinidae
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Exochella cf. longirostris
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Mucronella praestans
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| synonym of Escharella | |||||||
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Bivalvia
- Cardiida
- Veneridae
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Venus (Ventricoloidea) newtoni
(Wilckens 1911)
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| recombined as Eurhomalea newtoni | |||||||
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Bivalvia
- Cardiida
- Mactridae
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Mactra irizari
Wilckens 1912
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea cf. undatoides
(Ortmann 1902)
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Panopea cf. regularis
(Ortmann 1900)
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| recombined as Panopea (Panopea) regularis | |||||||
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Bivalvia
- Carditida
- Crassatellidae
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Eucrassatella (Spissatella) sp.
(Finlay 1926)
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| original and current combination Spissatella | |||||||
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Bivalvia
- Pectinida
- Pectinidae
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Chlamys (Chlamys) anderssoni
(Hennig 1911)
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| recombined as Austrochlamys anderssoni | |||||||
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Chlamys (Anatipopecten) cf. anatipes
(Morton 1833)
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| recombined as Anatipopecten anatipes | |||||||
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Gastropoda
- Vermetidae
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Petaloconchus cf. intortus
(Lamarck 1818)
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Gastropoda
- Struthiolariidae
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Struthiolarella cf. nordenskjoeldi
Wilckens 1912
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Gastropoda
- Neogastropoda
- Buccinidae
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Cyrtochetus cf. bucciniformis
Wilckens 1911
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| see common names | |||||||
Geography
| Country: | Antarctica |
| Coordinates: | 62.3° South, 59.0° West (view map) |
| Paleocoordinates: | 62.1° South, 58.4° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Pliocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Pliocene | ||
| Age range of interval: | 5.33300 - 2.58000 m.y. ago |
Stratigraphy
| Formation: | Polonez Cove | Member: | Low Head | ||
| Local section: | Profile 1 | Local bed: | Layer 11 | ||
| Local order: | bottom to top | ||||
| Regional section: | Low Head-Lions Rump | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Best exposure of the Low Head Mbr; sequence rests of basalts of the Mazurek Point Fm; represented by basal conglomerates over 15 m thick. Glaciomarine strata of the Polonez Cover Formation rest on basalts of the Mazurek Point Formattion, and are overlain by porphyritic lavas alternating with tuffs and agglomerates of the Boy Point Fortmation. The Polonez Cover Formation comprises four lithostratigraphic members, of which the lowest, the Karakowiak Glacier Mbr, consists of non-marine tillites, while the succeeding three members, the Low Head Mbr, the Siklawa Mbr, and the Oberek Cliff Mbr, are glaciomarine strata. The Low Head Mbr is the richest fossil-bearing unit of the Polonez Cove Formation and is represented by up to 15 m of ungraded conglomerates, consisting mainly of angular and subrounded basalt fragments, with ice-rafted dropstones, with common Chlamys coquina. The Pliocene age is suggested on the basis of macrofaunal similarity with Antarctic mainland assemblages, and from microfossils | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal conglomerate |
| Includes fossils? | Y |
| Lithology description: The Polonez Cove Formation is represented by up to 15 m of ungraded conglomerates, consisting mainly of angular and subrounded basalt fragments, with ice-rafted dropstones, with common Chlamys coquina. | |
| Environment: | coastal indet. |
| Geology comments: Glacio-marine strata, including ice-rafted dropstones. | |
Taphonomy
| Modes of preservation: | body,original aragonite,original calcite |
| Size of fossils: | macrofossils,mesofossils,microfossils |
| Disassociated minor elements: | some |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Collected by Gazdzicki and others in 1978-1979, 1980-1981 | |
| Taxonomic list comments:Includes all taxa mentioned in paper (coccoliths, diatoms, chrysomonads, foraminifers, worms, bryozoans, brachiopods, bivalves, gastropods, ostracods, crinoids, ophiuroids, echinoids) | |
Metadata
| Also known as: | Profile I; Layer 11 | ||
| Database number: | 41581 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-07-16 22:30:40 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-07-16 22:30:40 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 11141. | A. Gazdzicki and H. Pugaczewska. 1984. Biota of the "Pecten Conglomerate" (Polenez Cove Formation, Pliocene) of King George Island (South Shetland Islands, Antarctica). Studia Geologica Polonica 79:59-120 [A. Miller/A. Hendy/M. Uhen] |