D6 - San Ramon section: Danian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Rhabdosporites sp. Richardson 1960
Neoraistrichia sp. Potonié 1956
Neoraistrichia sp. of Archangelsky 1973
Bryopsida
Stereisporites informal sp. 2 Pflug 1953
Stereisporites regium Drugg 1967
Stereisporites antiquasporites Dettmann 1963
Lycopodiopsida - Selaginellales - Selaginellaceae
Herkosporites elliottii Stover 1973
Lycopodiopsida - Selaginellales
Ceratosporites equalis Cookson and Dettmann 1958
Equisetopsida - Cheirolepidiaceae
Classopollis sp. Pflug 1953
Equisetopsida - Araucariaceae
Araucariacites australis Cookson 1947
unclassified
Psilatricolpites inargutus Archangelsky 1973
Magnoliopsida
Rousea patagonica Archangelsky 1973
Gemmatricolpites informal sp. 1 van Hoeken-Klinkenberg 1964
Senipites tercrassata Archangelsky 1973
Striatricolporites gamerroi Archangelsky 1973
Haloragacidites harrisii Mildenhall and Harris 1971
Ulmoideipites patagonicus
Tricolporites informal sp. 3 Cookson 1947
Psilatricolporites salamanquensis Archangelsky and Zamaloa 1986
Retitricolporites informal sp. 1 Van der Hammen and Wymstra 1964
Rhoipites minusculus Archangelsky 1973
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites sp. Couper 1958
Angiospermae - Aquifoliales - Aquifoliaceae
Ilexpollenites clifdenensis McIntyre 1968
Angiospermae - Gentianales - Apocynaceae
cf. Cricotriporites sp. Leidelmeyer 1966
cf. Cricotriporites
Angiospermae - Proteales
Peninsulapollis gillii Dettmann and Jarzen 1988
Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988
Triatriopollenites bertelsii Archangelsky 1973
Triatriopollenites lateflexus Archangelsky 1973
Angiospermae - Proteales - Proteaceae
Lewalanipollis senectus Dettmann and Jarzen 1996
Propylipollis cf. tenuiexinus Dettmann and Jarzen 1996
Proteacidites informal sp. C Cookson and Couper 1953
Proteacidites angulatus Stover 1973
Echitriporites sp. Van der Hammen 1956
Angiospermae - Gunnerales
Tricolpites informal sp. 1 Couper 1953
Tricolpites reticulatus Couper 1953
Angiospermae - Poales - Typhaceae
Sparganiaceaepollenites sp. Thiergart 1937
Angiospermae - Arecaceae
Spinizonocolpites hialinus Archangelsky and Zamaloa 1986
Arecipites sp. Nichols et al. 1973
Arecipites minutiscabratus Mc Intyre 1968
Angiospermae - Fabales - Fabaceae
Margocolporites sp. Ramanajuan 1966
Angiospermae - Fagales
Nothofagidites informal sp. 1 Potonié 1960
Nothofagidites fuegiensis Menéndez and Caccavari 1975
Nothofagidites dorotensis Romero 1973
Angiospermae - Malvales - Bombacaceae
Bombacacidites informal sp. 1 Couper 1960
Coniferales - Podocarpaceae
Dacrycarpites australiensis Cookson and Pike 1953
Microcachryidites antarcticus Couper 1953
Trisaccites microsaccatum (Couper 1953)
original and current combination Trisaccites microsaccatus
Lygistepollenites florinii Stover and Evans 1973
Gamerroites psilasaccus Archangelsky 1988
Phyllocladidites mawsonii Cookson 1947
Podocarpidites spp.
Podocarpidites ellipticus Cookson 1947
Podocarpidites rugulosus Romero 1977
Podocarpidites elegans Romero 1977
Lycopsida
Foveotriletes cf. parvirectus Dettmann 1963
Pteridopsida
Cyathidites australis Couper 1953
Cyathidites minor Couper 1953
Deltoidospora sp. Miner 1935
Polypodiaceoisporites sp. Potonie 1956
Polypodiopsida - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
Polypodiopsida - Blechnaceae
Peromonolites vellosus Partridge 1973
Polypodiopsida - Dicksoniaceae
Trilites informal sp. 2 Erdtman and Couper 1947
Trilites tuberculiformis Cookson 1947
Trilites volkheimerii Filatoff 1975
Polypodiopsida - Gleicheniaceae
Gleicheniidites cercinidites Cookson 1953
Gleicheniidites senonicus Ross 1949
Clavifera triplex Bolkhovitina 1966
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 42.7° South, 69.8° West (view map)
Paleocoordinates:45.1° South, 58.8° West
Basis of coordinate:estimated from map
Time
Period:Paleogene Epoch:Paleocene
Stage:Danian 10 m.y. bin:Cenozoic 1
Key time interval:Danian
Age range of interval:66.00000 - 61.60000 m.y. ago
Stratigraphy
Formation:Lefipán
Local section:D6 Local bed:51.5 m
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: lithified mudstone
Includes fossils?Y
Lithology description: This bed: Bioturbation - Heterolithic bedding The Lefipán Formation consists of marine to marginal marine, fossiliferous sandstones and mudstones with some intercalated coquinas and conglomerates.
Environment:delta front
Geology comments: During the early Danian coarsening-upward cycles reflect accumulation in tidal bars, mainly in a tide to waveinfluenced distal delta-front environment with high sedimentation rates. These deposits bear molluscan faunal associations indicative of recurrent changes from normal marine to low-salinity marine environments with low-oxygen, fine-grained, soupy substrates.
Taphonomy
Modes of preservation:body,original sporopollenin
Size of fossils:microfossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:chemical,survey of museum collection
Reason for describing collection:paleoecologic analysis
Collection method comments: Slides are housed in the palynological collection of the Museo Paleontológico Egidio Feruglio, Trelew, Chubut, Argentina (MPEF-Palin)numbers 100 to 113.
Taxonomic list comments:Pollen terminology follows Punt et al. 2007.
Metadata
Database number:151458
Authorizer:C. Jaramillo Enterer:J. Moreno
Modifier:J. Moreno Research group:paleobotany
Created:2013-10-03 05:49:23 Last modified:2013-10-02 14:53:19
Access level:authorizer only Released:2016-10-03 05:49:23
Creative Commons license:CC BY
Reference information

Primary reference:

47987. V. D. Barreda, N. R. Cúneo, P. Wilf, E. D. Currano, R. A. Scasso and H. Brinkhuis. 2012. Cretaceous/Paleogene Floral Turnover in Patagonia: Drop in Diversity, Low Extinction, and a Classopollis Spike. PLoS ONE 7(12):e52455 [C. Jaramillo/J. Moreno]