D7 - 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
Leiotriletes sp. Potonie and Kremp 1954
unclassified
Neoraistrichia sp. Potonié 1956
Neoraistrichia sp. of Archangelsky 1973
Polypodiopsida - Dicksoniaceae
Trilites volkheimerii Filatoff 1975
Trilites tuberculiformis Cookson 1947
Polypodiopsida - Gleicheniaceae
Gleicheniidites senonicus Ross 1949
Clavifera triplex Bolkhovitina 1966
Polypodiopsida - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
Coniferales - Podocarpaceae
Microcachryidites antarcticus Couper 1953
Phyllocladidites mawsonii Cookson 1947
Trisaccites microsaccatum (Couper 1953)
Podocarpidites spp. Cookson 1947
Podocarpidites ellipticus Cookson 1947
Podocarpidites elegans Romero 1977
Magnoliopsida
Tricolporites informal sp. 3
Striatricolporites gamerroi Archangelsky 1973
Senipites tercrassata Archangelsky 1973
Psilatricolporites informal sp. 1
Rousea patagonica Archangelsky 1973
Rousea microreticulata Archangelsky and Zamaloa 1986
Retitricolporites informal sp. 1
Retitricolporites chubutensis Archangelsky 1973
Retitricolporites minutiformis Truswell and Owen 1988
Gemmatricolpites cf. subsphaericus Archangelsky 1973
Periporopollenites pallidus Truswell and Owens 1988
Haloragacidites harrisii Mildenhall and Harris 1971
Angiospermae
Triorites cf. orbiculatus McIntyre 1965
Angiospermae - Ericales - Ericaceae
Ericipites microtectanum Archangelsky and Zamaloa 1986
Angiospermae - Fagales
Nothofagidites informal sp. 1
Nothofagidites fuegiensis Menéndez and Caccavari 1975
Nothofagidites dorotensis Romero 1973
Angiospermae - Fabales - Fabaceae
Margocolporites sp. Ramanajuan 1966
Angiospermae - Proteales
Triatriopollenites informal sp. 1
Triatriopollenites lateflexus Archangelsky 1973
Triatriopollenites bertelsii Archangelsky 1973
Peninsulapollis gillii Dettmann and Jarzen 1988
Angiospermae - Proteales - Proteaceae
Proteacidites informal sp. A
Proteacidites informal sp. C
Proteacidites angulatus Stover 1973
Triporopollenites minor Barreda 1997
Lewalanipollis senectus Dettmann and Jarzen 1996
Angiospermae - Gunnerales
Tricolpites informal sp. 1
Tricolpites reticulatus Couper 1953
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites sp. Couper 1958
Angiospermae - Liliaceae
Liliacidites variegatus Couper 1953
Liliacidites vermireticulatus Archangelsky and Zamaloa 1986
Angiospermae - Arecaceae
Longapertites aff. vaneendenburgi Geermerad et al. 1968
Spinizonocolpites hialinus Archangelsky and Zamaloa 1986
Arecipites minutiscabratus Mc Intyre 1968
Angiospermae - Poales - Typhaceae
Sparganiaceaepollenites sp. Thiergart 1937
Equisetopsida - Cheirolepidiaceae
Classopollis sp. Pflug 1953
Lycopodiopsida - Lycopodiales
Retitriletes austroclavatidites Döring et al. 1963
Lycopodiopsida - Selaginellales
Camarozonosporites spp. Potonié 1956
Bryopsida
Stereisporites informal sp. 2
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:D7 Local bed:63.5 m
Local order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: lithified mudstone
Includes fossils?Y
Lithology description: This bed: 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:151459
Authorizer:C. Jaramillo Enterer:J. Moreno
Modifier:J. Moreno Research group:paleobotany
Created:2013-10-03 05:50:22 Last modified:2013-10-02 14:53:07
Access level:authorizer only Released:2016-10-03 05:50:22
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]