Seymour Island La Meseta: Eocene, Antarctica

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Fischeripollis sp. microspore
Magnoliopsida
Gemmamonocolpites sp. microspore Van der Hammen and Garcia 1966
Haloragacidites harrisii microspore Mildenhall and Harris 1971
Periporopollenites polyoratus microspore
Tricolporites sp. microspore Cookson 1947
Malvacipollis sp. microspore Harris 1965
Malvacipollis subtilis microspore Stover 1973
Angiospermae - Ericales - Ericaceae
Ericipites scabratus microspore Harris 1965
Angiospermae - Myrtales
Myrtaceidites parvus microspore Cookson and Pike 1960
Angiospermae - Poales - Restionaceae
Milfordia cf. homeopunctata microspore Partridge 1973
Angiospermae - Liliaceae
Liliacidites spp. microspore
Angiospermae - Gunnerales
Tricolpites reticulatus microspore Couper 1953
Angiospermae - Proteales - Proteaceae
Propylipollis spp. microspore
Proteacidites spp. microspore
Banksieaeidites spp. microspore
Beaupreaidites verrucosus microspore
Beaupreaidites spp. microspore
Angiospermae - Aquifoliales - Aquifoliaceae
Ilexpollenites sp. microspore Thiergart 1937
Angiospermae - Caryophyllales - Droseraceae
Droseridites sp. microspore Potonié 1960
Angiospermae - Santalales
Anacolosidites sp. microspore Krutzsch 1959
Angiospermae - Fagales
Nothofagidites spp. microspore
Angiospermae - Sapindales - Sapindaceae
Cupanieidites orthoteichus microspore
unclassified
Granodiporites sp. microspore Varma and Rewat 1963
see common names

Geography
Country:Antarctica
Coordinates: 64.3° South, 56.7° West (view map)
Paleocoordinates:63.8° South, 61.5° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2-3
Key time interval:Eocene
Age range of interval:56.00000 - 33.90000 m.y. ago
Stratigraphy
Formation:La Meseta
Lithology and environment
Primary lithology:current ripples,planar lamination,deformed bedding,burrows silty sandstone
Secondary lithology:concretionary,shelly/skeletal poorly lithified sandstone
Includes fossils?Y
Lithology description: Finely laminated beds of silty sandstone, some of which are interbedded with pebbly conglomeratic units interpreted to represent shell banks. The finer-grained beds between the shell banks are finely laminated, and exhibit ripple marks and flaser bedding. Vertical and oblique burrows are common throughout the finer-grained units. Small to large cut-and-fill channel features occur within the sandy silt-stone facies. Prominent slump structures and lenses of gravel are associated with these channels. The shell banks consist of individual beds that range in thickness from .5 to 2m, and extend laterally as much as 1km. The banks are characterized by coarse- to fine-grained, well-sorted arkosic sandstone beds that contain pebble- to cobble-sized clasts. Most of the shell banks are extremely fossiliferous.
Environment:coastal indet.
Geology comments: The information related to Geology of La Meseta Formation was taken from Collection #31173.

About environment: These deltaic, shallow marine to intertidal sediments are richly fossiliferous, containing a great variety of beautifully preserved invertebrate fossils (Stilwell & Zinsmeister, 1992).
Taphonomy
Modes of preservation:original sporopollenin
Size of fossils:microfossils
Temporal resolution:time-averaged
Spatial resolution:allochthonous
Collection methods and comments
Collection methods:chemical,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Subdivision of the La Meseta Formation terrestrial and marine palynomorph succession into four provisional zones is possible, but their formal description awaits confirmation from pending analyses of additional samples, particularly in the uppermost part of the formation.
Metadata
Database number:167931
Authorizer:C. Jaramillo Enterer:C. Jaramillo
Modifier:G. Varnham Research group:micropaleontology
Subset of collection #:31366
Created:2015-04-08 17:59:47 Last modified:2022-04-06 07:05:51
Access level:the public Released:2015-04-08 17:59:47
Creative Commons license:CC BY
Reference information

Primary reference:
54914.fossil record R. A. Askin. 1997. Eocene-?Earliest Oligocene terrestrial palynology of Seymour Island, Antarctica. : 993-996. The Antarctic Region: Geological Evolution and Processes 993-996 [C. Jaramillo/C. Jaramillo]