M2 - San Ramon section: Maastrichtian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Neoraistrichia sp. Potonié 1956
Neoraistrichia sp. of Archangelsky 1973
Lycopodiopsida - Lycopodiales
Retitriletes austroclavatidites Döring et al. 1963
Lycopodiopsida - Lycopodiales - Lycopodiaceae
Sestrosporites pseudoalveolatus Dettmann 1963
Lycopodiopsida - Selaginellales
Densoisporites velatus Dettmann 1963
Ceratosporites equalis Cookson and Dettmann 1958
Camarozonosporites spp.
Lycopodiopsida - Isoetales - Isoetaceae
Echinosporis sp. Krutzsch 1967
Magnoliopsida
Psilatricolporites informal sp. 1 Pierce 1961
Retitricolporites informal sp. 1 Van der Hammen and Wymstra 1964
Coniferales - Podocarpaceae
Phyllocladidites mawsonii Cookson 1947
Podocarpidites sp. Cookson 1947
Podocarpidites ellipticus Cookson 1947
Podocarpidites elegans Romero 1977
Podocarpidites rugulosus Romero 1977
Trisaccites microsaccatum (Couper 1953)
original and current combination Trisaccites microsaccatus
Microcachryidites antarcticus Couper 1953
Gamerroites psilasaccus Archangelsky 1988
Lygistepollenites florinii Stover and Evans 1973
Angiospermae - Fagales
Nothofagidites saraensis Menendez and Caccavari 1975
Angiospermae - Proteales - Proteaceae
Lewalanipollis senectus Dettmann and Jarzen 1996
Propylipollis sp. Martin and Harris 1975
Propylipollis ambiguus Dettmann and Jarzen 1996
Triporopollenites minor Barreda 1997
Proteacidites informal sp. B Cookson and Couper 1953
Angiospermae - Proteales
Triatriopollenites lateflexus Archangelsky 1973
Peninsulapollis informal sp. 2 Dettmann and Jarzen 1988
Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988
Peninsulapollis gillii Dettmann and Jarzen 1988
Angiospermae - Gunnerales
Tricolpites reticulatus Couper 1953
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites sp. Couper 1958
Angiospermae - Poales - Typhaceae
Sparganiaceaepollenites sp. Thiergart 1937
Angiospermae - Arecaceae
Arecipites sp. Nichols et al. 1973
Arecipites minutiscabratus Mc Intyre 1968
Spinizonocolpites hialinus Archangelsky and Zamaloa 1986
Longapertites aff. vaneendenburgi Geermerad et al. 1968
Angiospermae - Liliaceae
Liliacidites cf. crassibaculatus Freile 1972
Liliacidites vermireticulatus Archangelsky and Zamaloa 1986
Liliacidites variegatus Couper 1953
Liliacidites regularis Archangelsky 1973
Lycopsida
Foveotriletes cf. parvirectus Dettmann 1963
Pteridopsida
Cyathidites patagonicus Archangelsky 1972
Cyathidites minor Couper 1953
Cyathidites australis Couper 1953
Reticuloidosporites tenellis Krutzsch 1959
Leiotriletes sp. Potonie and Kremp 1954
Deltoidospora sp. Miner 1935
unclassified
Microfoveolatosporis sp. Krutzsch 1959
Polypodiopsida - Blechnaceae
Peromonolites informal sp. 1 Couper 1953
Peromonolites vellosus Partridge 1973
Polypodiopsida - Dicksoniaceae
Trilites informal sp. 1 Erdtman and Couper 1947
Trilites volkheimerii Filatoff 1975
Cyatheacidites annulatus Cookson 1947
Polypodiopsida - Polypodiaceae
Laevigatosporites ovatus Wilson and Webster 1946
Polypodiopsida - Gleicheniaceae
Gleicheniidites sp. Dettmann 1963
Gleicheniidites senonicus Ross 1949
Clavifera triplex Bolkhovitina 1966
Polypodiopsida - Schizaeales
Convolutispora informal sp. 2 Hoffmeister et al. 1955
unclassified
Cycadopites sp. Wodehouse 1933
Ginkgoopsida - Caytoniales
Vitreisporites pallidus Nilsson 1958
Bryopsida
Stereisporites sp. Pflug 1953
Stereisporites (Tripunctisporis) sp.
Stereisporites antiquasporites Dettmann 1963
Equisetopsida - Cheirolepidiaceae
Classopollis sp. Pflug 1953
Equisetopsida - Araucariaceae
Araucariacites australis Cookson 1947
see common names

Geography
Country:Argentina State/province:Chubut
Coordinates: 42.7° South, 69.8° West (view map)
Paleocoordinates:44.8° South, 58.3° West
Basis of coordinate:estimated from map
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Formation:Lefipán
Local section:M2 Local bed:11 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:marine indet.
Geology comments: The uppermost Maastrichtian is represented by tidal channel and tidal flat deposits with a low diversity Corbicula assemblage indicative of low salinity, high-stress environments unfavorable to most marine species that characterize the stable, normal marine, Maastrichtian infaunal guilds in most of the succession.
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:151446
Authorizer:C. Jaramillo Enterer:J. Moreno
Modifier:J. Moreno Research group:paleobotany
Created:2013-10-02 23:30:19 Last modified:2013-10-02 14:37:25
Access level:authorizer only Released:2016-10-02 23:30:19
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]