Puesto El Moro Creek - Rio Mayer Formation: Aptian - Early/Lower Albian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Cicatricocisporites cf. ticoensis
Microcachryridites antarcticus
Lycopodiopsida - Selaginellales - Selaginellaceae
Neoraistrickia informal sp. Potonié 1956
Lycopodiopsida - Selaginellales
Ceratosporites informal sp. Cookson and Dettmann 1958
Ceratosporites equalis Cookson and Dettmann 1958
Densoisporites corrugatus Archangelsky and Gamerro 1965
Densoisporites velatus Dettmann 1963
Lycopodiopsida - Lycopodiales
Retitriletes austroclavatidites Döring et al. 1963
Dictyotosporites complex Cookson and Dettmann 1958
Angiospermae - Gunnerales
Tricolpites informal sp. Couper 1953
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites informal sp. Couper 1958
Coniferales - Podocarpaceae
Trisaccites microsaccatus Couper 1953
Gamerroites volkheimeri Archangelsky 1988
Callialasporites informal sp. Sukh-Dev 1961
Podocarpidites cf. parviauriculatus Archangelsky and Villar de Seoane 2005
Podocarpidites cf. vestitus Archangelsky and Villar de Seoane 2005
Podocarpidites marwickii Couper 1953
Podocarpidites ellipticus Cookson 1947
Podocarpidites cf. canadensis Pocock 1962
Equisetopsida - Cheirolepidiaceae
Classopollis informal sp. Pflug 1953
Equisetopsida - Araucariaceae
Cyclusphaera informal sp. Elsik 1966
Cyclusphaera radiata Archangelsky 1983
Cyclusphaera psilata Volkheimer and Sepulveda 1976
unclassified
Staplinisporites caminus Pocock 1962
Taurocusporites segmentatus Stover 1962
Bryopsida
Stereisporites cf. antiquasporites Dettmann 1963
unclassified
Interulobites (cf. Interolubites) sp. Phillips 1971
cf. Interolubites sp. Archangelsky 1983
Marchantiopsida - Sphaerocarpales
Aequitriradites superspinulosus Archangelsky et al. 2008
Polypodiopsida
Verrucosisporites cf. varians Volkheimer 1972
Polypodiopsida - Schizaeales
Ruffordiaspora ludbrookiae Dettmann and Clifford 1992
Ruffordiaspora australiensis Dettmann and Clifford 1992
Appendicisporites cf. potomacensis Brenner 1963
Appendicisporites cf. pschekhaensis Pocock 1964
Polypodiopsida - Schizaeales - Schizaeaceae
Cicatricosisporites pseudotripartitus Dettmann 1963
Cicatricosisporites cf. minutaestriatus Pocock 1964
Cicatricosisporites cuneiformis Pocock 1964
Polypodiopsida - Schizaeales
Nodosisporites crenimurus Davies 1986
Polypodiopsida - Gleicheniaceae
Ornamentifera cf. tuberculata Bolkhovitina 1966
Gleicheniidites senonicus Ross 1949
Polypodiopsida - Osmundaceae
Baculatisporites comaumensis Potonie 1953
Baculatisporites kachaikensis Archangelsky and Llorens 2005
Rugulatisporites informal sp. Pflug and Thomson 1953
Polypodiopsida - Dicksoniaceae
Cyatheacidites tectifera Archangelsky and Gamerro 1965
Trilites informal sp. Erdtman and Couper 1947
unclassified
Muricingulisporis cf. annulatus Archangelsky and Gamerro 1966
Pteridopsida
Osmundacidites wellmanii Couper 1953
Cyathidites minor Couper 1953
unclassified
Cibotiumspora jurienensis Filatoff 1975
see common names

Geography
Country:Argentina State/province:Santa Cruz
Coordinates: 49.1° South, 72.1° West (view map)
Paleocoordinates:50.9° South, 39.2° West
Basis of coordinate:stated in text
Altitude:590 meters
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Key time interval:Aptian - Early/Lower Albian
Age range of interval:121.40000 - 109.90000 m.y. ago
Stratigraphy
Formation:Rio Mayer
Stratigraphic resolution:bed
Lithology and environment
Primary lithology:black lithified argillaceous "shale"
Includes fossils?Y
Lithology description: In the area studied, the Río Mayer Formation reaches approximately 72 m in thickness, and is composed of dark, fine-grained deposits of shales and claystones, the latter presenting thin intercalations of limestones.
Environment:transition zone/lower shoreface
Geology comments: Arbe (1989) divided this unit into a Lower Member, deposited in a deep marine environment, and an Upper Member, deposited in a shallower environment of higher energy.
Taphonomy
Modes of preservation:body,soft parts
Size of fossils:microfossils
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:all macrofossils,some microfossils
Collection methods:bulk,chemical,hydrochloric,hydroflouric,field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:MACN
Metadata
Database number:149849
Authorizer:C. Jaramillo Enterer:P. Santamarina
Modifier:P. Santamarina Research group:micropaleontology,paleobotany
Created:2013-08-28 04:43:09 Last modified:2013-08-28 09:39:41
Access level:authorizer only Released:2017-08-28 04:43:09
Creative Commons license:CC BY
Reference information

Primary reference:
48010. V. Perez Loinaze, S. Archangelsky, and G. Cladera. 2011. Palynostratigraphic study of the Early Cretaceous Río Mayer and Kachaike formations at the Quebrada El Moro Section, Austral Basin, southwestern Argentina. Cretaceous Research (34)161-171 [C. Jaramillo/P. Santamarina/P. Santamarina]