D4 - San Ramon section: Danian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Neoraistrichia sp. Potonié 1956
Neoraistrichia sp. of Archangelsky 1973
Lycopsida
Foveotriletes cf. parvirectus Dettmann 1963
Polypodiopsida - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
Polypodiopsida - Osmundaceae
Rugulatisporites chubutensis Baldoni 1992
Polypodiopsida - Gleicheniaceae
Clavifera triplex Bolkhovitina 1966
Gleicheniidites sp. Dettmann 1963
Gleicheniidites senonicus Ross 1949
Polypodiopsida - Blechnaceae
Peromonolites informal sp. 2 Couper 1953
Polypodiopsida - Schizaeales
Convolutispora informal sp. 1 Hoffmeister et al. 1955
Polypodiopsida - Dicksoniaceae
Trilites informal sp. 2 Erdtman and Couper 1947
Trilites volkheimerii Filatoff 1975
Trilites tuberculiformis Cookson 1947
Cyatheacidites annulatus Cookson 1947
Pteridopsida
Cyathidites australis Couper 1953
Cyathidites patagonicus Archangelsky 1972
Cyathidites minor Couper 1953
Leiotriletes sp. Potonie and Kremp 1954
Deltoidospora sp. Miner 1935
Matonisporites sp. Couper 1958
Bryopsida
Stereisporites sp. Pflug 1953
Stereisporites (Tripunctisporis) sp.
Angiospermae - Arecaceae
Arecipites sp. Nichols et al. 1973
Arecipites minutiscabratus Mc Intyre 1968
Longapertites aff. vaneendenburgi Geermerad et al. 1968
Angiospermae - Poales - Typhaceae
Sparganiaceaepollenites sp. Thiergart 1937
Angiospermae - Liliaceae
Liliacidites vermireticulatus Archangelsky and Zamaloa 1986
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites sp. Couper 1958
Angiospermae - Aquifoliales - Aquifoliaceae
Ilexpollenites clifdenensis McIntyre 1968
Angiospermae - Gentianales - Apocynaceae
cf. Cricotriporites sp. Leidelmeyer 1966
Angiospermae - Gunnerales
Tricolpites reticulatus Couper 1953
Angiospermae - Proteales - Proteaceae
Lewalanipollis sp. Dettmann and Jarzen 1996
Lewalanipollis senectus Dettmann and Jarzen 1996
Proteacidites informal sp. C Cookson and Couper 1953
Proteacidites angulatus Stover 1973
Echitriporites sp. Van der Hammen 1956
Triporopollenites minor Barreda 1997
Angiospermae - Proteales
Triatriopollenites lateflexus Archangelsky 1973
Peninsulapollis informal sp. 2 Dettmann and Jarzen 1988
Peninsulapollis gillii Dettmann and Jarzen 1988
Angiospermae - Piperales - Aristolochiaceae
Rosannia manika Srivastava and Braman 2010
Angiospermae - Fagales
Nothofagidites informal sp. 1 Potonié 1960
Magnoliopsida
Haloragacidites harrisii Mildenhall and Harris 1971
Retitricolporites informal sp. 1 Van der Hammen and Wymstra 1964
Retitricolporites cf. minutiformis Truswell and Owen 1988
Retitricolporites chubutensis Archangelsky 1973
Senipites tercrassata Archangelsky 1973
Rousea patagonica Archangelsky 1973
Psilatricolporites informal sp. 1 Pierce 1961
Coniferales - Podocarpaceae
Gamerroites psilasaccus Archangelsky 1988
Dacrycarpites australiensis Cookson and Pike 1953
Phyllocladidites mawsonii Cookson 1947
Podocarpidites spp.
Podocarpidites elegans Romero 1977
Podocarpidites ellipticus Cookson 1947
Microcachryidites antarcticus Couper 1953
Lygistepollenites florinii Stover and Evans 1973
Equisetopsida - Cheirolepidiaceae
Classopollis sp. Pflug 1953
unclassified
Psilatricolpites inargutus Archangelsky 1973
Lycopodiopsida - Isoetales - Isoetaceae
Echinosporis sp. Krutzsch 1967
Lycopodiopsida - Selaginellales
Ceratosporites equalis Cookson and Dettmann 1958
Camarozonosporites spp.
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:D4 Local bed:41.5 m
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: lithified mudstone
Includes fossils?Y
Lithology description: This bed: Bioturbation - Tidal cross lamination 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:151456
Authorizer:C. Jaramillo Enterer:J. Moreno
Research group:paleobotany
Created:2013-10-03 05:41:39 Last modified:2013-10-02 14:41:39
Access level:authorizer only Released:2016-10-03 05:41:39
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]