Sobradinho section / SOB-9b: Late/Upper Aptian, Brazil

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Monocolpites informal spp.
Magnoliopsida
Rousea aff. geranioides Srivastava 1977
Rousea cf. georgensis Dettmann 1973
Angiospermae
Stellatopollis informal spp.
Stellatopollis barghoorni Doyle 1975
Retimonocolpites informal sp. 3 Pierce 1961
Retimonocolpites informal sp. 7 Pierce 1961
Retimonocolpites informal sp. 10 Pierce 1961
Angiospermae - Gunnerales
Tricolpites informal spp.
Angiospermae - Nymphaeales - Nymphaeaceae
Dichastopollenites informal spp.
unclassified
Phimopollenites informal sp. Dettmann 1973
Phimopollenites pseudocheros Srivastava 1975
see common names

Geography
Country:Brazil State/province:Ceará
Coordinates: 7.5° South, 39.1° West (view map)
Paleocoordinates:8.9° South, 7.4° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
10 m.y. bin:Cretaceous 2-3
Key time interval:Late/Upper Aptian
Age range of interval:119.50000 - 113.00000 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 sandy sandstone
Secondary lithology: lithified argillaceous "shale"
Lithology description: The section starts with cross-bedded sand- and siltstones intercalated with grey and greenish mudstones, which pass upward into a thick sequence of organic-rich shales.
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:150997
Authorizer:C. Jaramillo Enterer:P. Santamarina
Modifier:M. Carrano Research group:micropaleontology
Created:2013-09-19 06:33:32 Last modified:2023-03-13 15:51:05
Access level:authorizer only Released:2018-09-19 06:33:32
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]