Sobradinho section / SOB-8: Late/Upper Aptian, Brazil

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Angiospermae
Retimonocolpites informal spp.
Retimonocolpites informal sp. 4 Pierce 1961
Retimonocolpites informal sp. 15 Pierce 1961
Angiospermae - Nymphaeales - Nymphaeaceae
Dichastopollenites informal sp. 1 May 1975
Angiospermae - Chloranthales - Chloranthaceae
Clavatipollenites informal spp.
Clavatipollenites cf. minutus Brenner 1963
Clavatipollenites cf. hughesii Kemp 1968
Angiospermae - Gunnerales
Tricolpites informal spp.
Tricolpites informal sp. AR3 Couper 1953
Tricolpites cf. crassimurus Singh 1971
Angiospermae - Alismatales
Pennipollis informal spp.
Angiospermae
Stellatopollis barghoorni Doyle 1975
Magnoliopsida
Rousea informal spp.
Rousea aff. geranioides Srivastava 1977
unclassified
Monocolpites informal spp.
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:150996
Authorizer:C. Jaramillo Enterer:P. Santamarina
Modifier:M. Carrano Research group:micropaleontology
Created:2013-09-19 06:32:26 Last modified:2023-03-13 15:50:59
Access level:authorizer only Released:2018-09-19 06:32:26
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]