Site KG- Triton Point: Late/Upper Albian, Antarctica

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Sphenopteris warragulensis McCoy 1892
Polypodiopsida - Osmundaceae
Phyllopteroides sp. Medwell 1954
Phyllopteroides antarctica Cantrill and Nagalingum 2005
Polypodiopsida - Gleicheniaceae
Microphyllopteris unisora Cantrill and Nagalingum 2005
Polypodiopsida - Cyatheales - Cyatheaceae
Coniopteris cf. frutiformis Douglas 1973
Sphenopteridae
Sphenopteris sanjuliensis Cantrill and Nagalingum 2005
see common names

Geography
Country:Antarctica
Coordinates: 72.0° South, 68.5° West (view map)
Paleocoordinates:77.9° South, 48.5° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Albian 10 m.y. bin:Cretaceous 4
Key time interval:Late/Upper Albian
Age range of interval:106.20000 - 100.50000 m.y. ago
Stratigraphy
Geological group:Fossil Bluff Formation:Triton Point
Lithology and environment
Primary lithology: lithified sandstone
Lithology description: SPECIFIC LITHOLOGY: Unknown lithology The Triton Point Formation consists of a wedge-like package of fluvial sedimentary rocks which thickens from 200 m at Triton Point in the north of the study area to c. 950 m at Citadel Bastion, Titan Nunataks and Coal Nunatak in the south.
Environment:"floodplain"
Geology comments: The sedimentology of the Triton Point Formation has been studied separately in the northern part (Triton Point to Pagoda Ridge) and the southern part (Citadel Bastion to Titan Nunataks) of the field area. In the northern area, the sedimentary succession is interpreted as the product of a braided alluvial plain environment. In the southern, two distinctive sedimentary members are present. The lower unit, the Citadel Bastion Member, is interpreted as a braided alluvial plain deposit, whereas the upper unit, the Coal Nunatak Member (~130 m thick), is interpreted as a coastal plain meander belt deposit.
Taphonomy
Modes of preservation:mold/impression,original cellulose
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Collection method comments: All specimens are housed at the British Antarctic Survey and catalogued with the prefix KG.
The material was examined under an Olympus SZH-10 stereo microscope, and photographed using Kodak Technical Pan film. Line drawings were made using a
camera lucida attached to the Olympus microscope. The following terms are used in the species synonymies for those taxa figured and listed by Jefferson (1981).
Metadata
Database number:150511
Authorizer:C. Jaramillo Enterer:J. Moreno
Modifier:J. Moreno Research group:paleobotany
Created:2013-09-10 01:55:38 Last modified:2013-09-09 11:35:43
Access level:authorizer only Released:2016-09-10 01:55:38
Creative Commons license:CC BY
Reference information

Primary reference:
48143. D. J. Cantrill and N. S. Nagalingum. 2005. Ferns from the Cretaceous of Alexander Island, Antarctica: Implications for Cretaceous phytogeography of the Southern Hemisphere. Review of Palaeobotany and Palynology [C. Jaramillo/J. Moreno]