Estiva section / EST-53: Late/Upper Aptian, Brazil

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Phimopollenites informal sp. Dettmann 1973
Magnoliopsida
Rousea cf. delicata
Rousea informal spp.
Rousea aff. geranioides Srivastava 1977
Rousea cf. georgensis Dettmann 1973
Angiospermae - Gunnerales
Tricolpites informal spp.
Tricolpites informal sp. AR4 Couper 1953
Tricolpites cf. micromunus Burger 1970
Angiospermae - Arecaceae
Arecipites informal spp.
Angiospermae
Retimonocolpites informal sp. 4 Pierce 1961
unclassified
Trisectoris cf. reticulatus Heimhofer and Hochuli 2010
see common names

Geography
Country:Brazil State/province:CearĂ¡
Coordinates: 7.1° South, 39.8° West (view map)
Paleocoordinates:8.6° South, 8.1° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Aptian 10 m.y. bin:Cretaceous 3
Key time interval:Late/Upper Aptian
Age range of interval:122.46000 - 112.03000 m.y. ago
Stratigraphy
Geological group:Santana
Stratigraphic resolution:formation
Stratigraphy comments: From Melo et al. 2020: In summary, this integrated study of foraminifera, ostracodes and other microfossil data from the Romualdo Formation indicates that the local Alagoas Stage (Ostracoda Zone RT-011) can now be constrained to the Aptian. Arai and Assine 2020 also support that the Romualdo Formation and Santana Group is entirely Aptian in age.
Lithology and environment
Primary lithology: lithified muddy,silty mudstone
Lithology description: The organic-rich shales are gradually replaced by grey-green silt-rich mudstones containing an impoverished benthic fauna including ostracods, gastropods and bivalves. In the uppermost part of this unit, one to several limestone beds with abundant storm reworked gastropods (Paraglauconia layer) can be traced across the entire basin and used as a bio- and lithostratigraphic correlation horizon.
Environment:marine indet.
Taphonomy
Modes of preservation:body,soft parts,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection methods:bulk,chemical,hydrochloric,hydroflouric,field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:151002
Authorizer:C. Jaramillo Enterer:P. Santamarina
Modifier:M. Carrano Research group:micropaleontology
Created:2013-09-19 06:42:28 Last modified:2023-03-13 15:51:25
Access level:authorizer only Released:2018-09-19 06:42:28
Creative Commons license:CC BY
Reference information

Primary reference:

48227. U. Heimhofer and P.-A. Hochuli. 2010. Early Cretaceous angiosperm pollen from a low latitude succession (Araripe Basin, NE Brazil). Review of Palaeobotany and Palynology 161:105-126 [C. Jaramillo/P. Santamarina/P. Santamarina]