Mina Pedra Branca section / PB-5: Late Aptian, Brazil

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Angiospermae - Nymphaeales - Nymphaeaceae
Angiospermae - Gunnerales
Angiospermae - Chloranthales - Chloranthaceae
Angiospermae
Magnoliopsida
Rousea informal spp. Srivastava 1969
Rousea delicipollis Srivastava 1977
Rousea aff. geranioides Srivastava 1977
unclassified
see common names

Geography
Country:Brazil State/province:Caerá
Coordinates: 7.1° South, 39.7° West (view map)
Paleocoordinates:5.0° South, 2.6° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Early Cretaceous
10 m.y. bin: Cretaceous 2-3
Key time interval: Late Aptian
Age range of interval: 119.57 - 113.2 m.y. ago
Stratigraphy
Geological group:Santana Formation:Pedra Branca
Local order:bottom to top
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 is entirely Aptian in age.
Lithology and environment
Primary lithology:black lithified argillaceous "shale"
Lithology description: Above the evaporite unit, the succession is composed of a thick conglomeratic horizon (∼1 m), overlain by a distinct black shale horizon (∼1.5 m), known as Pedra Branca Member. The upper part of the succession consists of a sequence of pale deltaic sand- and siltstones alternating with varicoloured mudstones.
Environment:deltaic 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:150991
Authorizer:C. Jaramillo Enterer:P. Santamarina
Modifier:M. Carrano Research group:micropaleontology
Created:2013-09-19 06:20:14 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2018-09-19 06:20:14
Creative Commons license:CC0
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]