Estiva section / EST-53 (Cretaceous of Brazil)

Where: CearĂ¡, Brazil (7.1° S, 39.8° W: paleocoordinates 8.6° S, 8.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Santana Group, Late/Upper Aptian (122.5 - 113.0 Ma)

• 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.

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, muddy, silty mudstone

• 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.

Size class: microfossils

• Other: Palynomorphs

Preservation: soft parts, original sporopollenin

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 151002: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 19.09.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Phimopollenites
  -
Phimopollenites "sp." Dettmann 1973
Magnoliopsida
  -
Rousea "spp." Srivastava 1969
Rousea cf. georgensis Dettmann 1973
Rousea aff. geranioides Srivastava 1977
Angiospermae
  -
 Gunnerales -
 Mesangiosperms - Arecaceae
Arecipites "spp." Nichols et al. 1973 palm
Trisectoris
  -
Trisectoris cf. reticulatus Heimhofer and Hochuli 2010