D11 - 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
Verrucosisporites informal sp. 1 Potonie and Kremp 1954
Verrucosisporites informal sp. 2 Potonie and Kremp 1954
Polypodiopsida - Gleicheniaceae
Clavifera triplex Bolkhovitina 1966
Gleicheniidites circinidites Dettmann 1963
Gleicheniidites senonicus Ross 1949
Polypodiopsida - Blechnaceae
Peromonolites informal sp. 2 Couper 1953
Peromonolites informal sp. 1 Couper 1953
Polypodiopsida - Schizaeales
Convolutispora informal sp. 1 Hoffmeister et al. 1955
Polypodiopsida - Dicksoniaceae
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
unclassified
Rouseisporites sp. Pocock 1962
Bryopsida
Stereisporites informal sp. 2 Pflug 1953
Stereisporites antiquasporites Dettmann 1963
Angiospermae - Arecaceae
Arecipites minutiscabratus Mc Intyre 1968
Spinizonocolpites hialinus 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 informal sp. 2 Couper 1953
Tricolpites reticulatus Couper 1953
Angiospermae - Proteales - Proteaceae
Proteacidites informal sp. A Cookson and Couper 1953
Proteacidites informal sp. C Cookson and Couper 1953
Proteacidites informal sp. D Cookson and Couper 1953
Triporopollenites minor Barreda 1997
Angiospermae - Proteales
Triatriopollenites bertelsii Archangelsky 1973
Triatriopollenites lateflexus Archangelsky 1973
Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988
Peninsulapollis gillii Dettmann and Jarzen 1988
Angiospermae - Fagales
Nothofagidites dorotensis Romero 1973
Nothofagidites fuegiensis Menéndez and Caccavari 1975
Nothofagidites saraensis Menendez and Caccavari 1975
Angiospermae - Ericales - Ericaceae
Ericipites microtectanum Archangelsky and Zamaloa 1986
Magnoliopsida
Haloragacidites harrisii Mildenhall and Harris 1971
Retitricolporites informal sp. 1 Van der Hammen and Wymstra 1964
Gemmatricolpites informal sp. 1 van Hoeken-Klinkenberg 1964
Rousea patagonica Archangelsky 1973
Psilatricolporites informal sp. 1 Pierce 1961
Psilatricolporites informal sp. 2 Pierce 1961
Coniferales - Podocarpaceae
Gamerroites psilasaccus Archangelsky 1988
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
Lycopodiopsida - Selaginellales - Selaginellaceae
Perotrilites sp. Couper 1953
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: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]