D11 - San Ramon section: Danian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Pteridopsida
Cyathidites australis Couper 1953
Cyathidites patagonicus Archangelsky 1972
Cyathidites minor Couper 1953
Deltoidospora sp. Miner 1935
Leiotriletes sp. Potonie and Kremp 1954
unclassified
Neoraistrichia sp. Potonié 1956
Neoraistrichia sp. of Archangelsky 1973
Polypodiopsida - Blechnaceae
Peromonolites informal sp. 2
Peromonolites informal sp. 1
Polypodiopsida - Schizaeales
Convolutispora informal sp. 1
Polypodiopsida - Dicksoniaceae
Cyatheacidites annulatus Cookson 1947
Trilites volkheimerii Filatoff 1975
Trilites tuberculiformis Cookson 1947
Polypodiopsida - Gleicheniaceae
Gleicheniidites senonicus Ross 1949
Gleicheniidites circinidites Dettmann 1963
Clavifera triplex Bolkhovitina 1966
Polypodiopsida - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
Polypodiopsida
Verrucosisporites informal sp. 1
Verrucosisporites informal sp. 2
Lycopsida
Foveotriletes cf. parvirectus Dettmann 1963
Coniferales - Podocarpaceae
Gamerroites psilasaccus Archangelsky 1988
Microcachryidites antarcticus Couper 1953
Phyllocladidites mawsonii Cookson 1947
Lygistepollenites florinii Stover and Evans 1973
Podocarpidites spp. Cookson 1947
Podocarpidites ellipticus Cookson 1947
Podocarpidites elegans Romero 1977
Magnoliopsida
Psilatricolporites informal sp. 1
Psilatricolporites informal sp. 2
Rousea patagonica Archangelsky 1973
Retitricolporites informal sp. 1
Gemmatricolpites informal sp. 1
Haloragacidites harrisii Mildenhall and Harris 1971
Angiospermae - Ericales - Ericaceae
Ericipites microtectanum Archangelsky and Zamaloa 1986
Angiospermae - Fagales
Nothofagidites saraensis Menendez and Caccavari 1975
Nothofagidites fuegiensis Menéndez and Caccavari 1975
Nothofagidites dorotensis Romero 1973
Angiospermae - Gentianales - Apocynaceae
cf. Cricotriporites sp. Leidelmeyer 1966
Angiospermae - Aquifoliales - Aquifoliaceae
Ilexpollenites clifdenensis McIntyre 1968
Angiospermae - Proteales
Triatriopollenites lateflexus Archangelsky 1973
Triatriopollenites bertelsii Archangelsky 1973
Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988
Peninsulapollis gillii Dettmann and Jarzen 1988
Angiospermae - Proteales - Proteaceae
Proteacidites informal sp. A
Proteacidites informal sp. C
Proteacidites informal sp. D
Triporopollenites minor Barreda 1997
Angiospermae - Gunnerales
Tricolpites informal sp. 2
Tricolpites reticulatus Couper 1953
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites sp. Couper 1958
Angiospermae - Arecaceae
Spinizonocolpites hialinus Archangelsky and Zamaloa 1986
Arecipites minutiscabratus Mc Intyre 1968
Equisetopsida - Cheirolepidiaceae
Classopollis sp. Pflug 1953
Lycopodiopsida - Selaginellales - Selaginellaceae
Perotrilites sp. Couper 1953
Bryopsida
Stereisporites informal sp. 2
Stereisporites antiquasporites Dettmann 1963
unclassified
Rouseisporites sp. Pocock 1962
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 - 61.6 m.y. ago
Stratigraphy
Formation:Lefipán
Local section:D11 Local bed:88.5 m
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: lithified mudstone
Includes fossils?Y
Lithology description: This bed: Bioturbation - Horizontal 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:151463
Authorizer:C. Jaramillo Enterer:J. Moreno
Research group:paleobotany
Created:2013-10-03 05:58:02 Last modified:2013-10-02 14:58:02
Access level:authorizer only Released:2016-10-03 05:58:02
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]