Arroyo Calafate: Maastrichtian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polypodiopsida - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
Polypodiopsida
Verrucosisporites sp. Potonie and Kremp 1954
Polypodiopsida - Osmundaceae
Baculatisporites sp. Thomson and Pflug 1953
Baculatisporites comaumensis Potonie 1953
Polypodiopsida - Gleicheniaceae
Gleicheniidites senonicus Ross 1949
Polypodiopsida - Schizaeales - Schizaeaceae
Cicatricosisporites australiensis Potonié 1956
Pteridopsida
Granulatisporites sp. Potonié and Kremp 1954
Cyathidites sp. Couper 1953
Cyathidites minor Couper 1953
Matonisporites sp. Couper 1958
Ischyosporites volkheimeri Filatoff 1975
unclassified
Rouseisporites reticulatus Pocock 1962
Bryopsida
Stereisporites antiquasporites Dettmann 1963
Angiospermae - Arecaceae
Arecipites sp. Nichols et al. 1973
Arecipites minutiscabratus Mc Intyre 1968
Longapertites sp. van Hoeken-Klinkenberg 1964
Spinizonocolpites hialinus Archangelsky and Zamaloa 1986
Angiospermae - Liliaceae
Liliacidites sp. Couper 1953
Liliacidites cf. variegatus Couper 1953
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites sp. Couper 1958
Angiospermae - Proteales - Proteaceae
Proteacidites sp. Cookson and Couper 1953
Angiospermae - Proteales
Peninsulapollis gillii Dettmann and Jarzen 1988
Retidiporites camachoii Archangelsky 1973
Angiospermae - Ericales - Ericaceae
Ericipites scabratus Harris 1965
Magnoliopsida
Senipites sp. Srivastava 1969
Rousea patagonica Archangelsky 1973
Rhoipites sp. Wodehouse 1933
Rhoipites minusculus Archangelsky 1973
Psilatricolporites sp. Pierce 1961
Coniferales - Podocarpaceae
Gamerroites psilasaccus Archangelsky 1988
Trisaccites microsaccatum (Couper 1953)
original and current combination Trisaccites microsaccatus
Phyllocladidites mawsonii Cookson 1947
Podocarpidites elegans Romero 1977
Podocarpidites cf. ellipticus Cookson 1947
Microcachryidites antarcticus Couper 1953
unclassified
Nyssapollenites cf. squamosus Dettmann 1973
Cycadopites nitidus de Jersey 1964
Ginkgoopsida - Ephedrales
Equisetosporites sp. Daugherty 1941
Lycopodiopsida - Lycopodiales
Retitriletes austroclavatidites Döring et al. 1963
Lycopodiopsida - Selaginellales
Ceratosporites equalis Cookson and Dettmann 1958
Lycopodiopsida - Selaginellales - Selaginellaceae
Perotrilites majus Evans 1970
Dinophyceae - Gonyaulacales
Cleistosphaeridium sp. Davey 1966
see common names

Geography
Country:Argentina State/province:Santa Cruz
Coordinates: 50.4° South, 72.2° West (view map)
Paleocoordinates:52.3° South, 62.0° West
Basis of coordinate:stated in text
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Formation:La Irene
Lithology and environment
Primary lithology: lithified sandy sandstone
Secondary lithology: lithified argillaceous,sandy "shale"
Includes fossils?Y
Lithology description: At the base of Cerro Calafate has measured a column of about 230 m in thickness on the drive here considered (Fig. 2). The 110 m below represent a succession of sandy banks clear yellowish brown color to white and dark pelitic packages fining upwards cycles are stacked to form a sequence with a clear trend growing grain and stratum. Sandy banks (coarse to fine sand) show increasing thickness from 2 m at the base to more than 9 m, whereas intercalated mudstones show an opposite trend with thickness ranging from 15 m at the base to 1 m. At the top of lower shaly packets (the thickest) are preserved carbonaceous shale intervals, thinly laminated. 120 m above correspond to a succession of amalgamated conglomeratic sandy banks where preservation is extremely rare shaly intervals.
Environment:fluvial-deltaic indet.
Taphonomy
Modes of preservation:soft parts,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection methods:chemical,hydrochloric,hydroflouric
Reason for describing collection:paleoecologic analysis
Collection method comments: Museum repositories: Provincial Regional Museum "Padre Manuel Jesús Molina" (MPM-MP) in the Río Gallego city, Santa Cruz, Argentina.
Metadata
Database number:149974
Authorizer:C. Jaramillo Enterer:J. Moreno
Modifier:J. Moreno Research group:paleobotany
Created:2013-08-30 01:30:37 Last modified:2013-08-29 13:42:43
Access level:authorizer only Released:2016-08-30 01:30:37
Creative Commons license:CC BY
Reference information

Primary reference:
48033. L. Povilauskas, V. Barreda, and S. Marenssi. 2008. Polen y esporas de la Formación La Irene (Maastrichtiano), sudoeste de la provincia de Santa Cruz, Argentina: primeros resultados. Geobios 41:819-831 [C. Jaramillo/J. Moreno/J. Moreno]