Analysis of a Cretaceous (late Aptian) high-stress ecosystem: The Romualdo Formation of the Araripe Basin, northeastern Brazil

Fürsich, Franz T.; Custódio, Michele Andriolli; Matos, Suzana Aparecida; Hethke, Manja; Quaglio, Fernanda; Warren, Lucas Veríssimo; Assine, Mário Luís; Simões, Marcello Guimarães

doi:10.1016/j.cretres.2018.11.021

Cited by 40 publications

(24 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These units comprehend mixed carbonate-evaporite-siliciclastic depositional system tracts (Assine et al 2014, Fig. 1) related to short-lived marine ingressions (Arai 2014, Custódio et al 2017, Fürsich et al 2019, Varejão et al 2019b, Rodrigues et al 2020.…”

Section: Geological Settingmentioning

confidence: 98%

“…Indeed, the distinction between marine and non-marine settings under the influence of epicontinental seas -as is the case of the Araripe Basin (Arai 2014, Custódio et al 2017, Fürsich et al 2019, Goldberg et al 2019, Varejão et al 2019b, Rodrigues et al 2020) -is a complicate issue in basin analysis especially when ambiguous body and trace fossils are recorded in the preserved assemblages (e.g., Barnes 1989, Buatois et al 1997, Gomez et al 2009, Keller et al 2009, Gross et al 2016, Quijada et al 2016, Mas et al 2018 Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil) Bright et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The recognition of intervals with paleoenvironmental and paleogeographic significance is of ultimate importance for better characterizing the depositional record of the Crato Formation. Within the last years, during detailed mapping and stratigraphic investigation of the formation within the scope of a broad investigation of the Santana Group (i.e., Assine et al 2014, Catto et al 2016, Custódio et al 2017, Fürsich et al 2019, Varejão et al 2019b, Silva et al 2020a, Silva et al 2020b, Rodrigues et al 2020, we were able to:…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

et al. 2021

Self Cite

View full text Add to dashboard Cite

The Aptian Crato Formation is world renowned for its well-preserved fossils in microbially-induced laminated limestones, which are regarded as one of the main Cretaceous Konservat-Lagerstätte of the geological record. Detailed stratigraphic investigation and mapping of the up to 90-m-thick Crato Formation at the eastern border of the Araripe Plateau allowed recognition of a regionally persistent fossil-bearing muddy interval, herein defined as the Caldas Bed. At its type locality, it is defined as an up to 2-m-thick coarsening-upward succession of grey/green mudstone and interbedded sandy siltstone and claystone. The 0.85-to 2-m-thick interval was recognized in several localities along the outcrop belt, and it is bounded by sharp, lower (Konservat-Lagerstätte limestone) and upper (sandstone and heterolithic facies) contacts. Despite previous literature data suggesting the presence of marine mollusks, the bed contains freshwater bivalves, small gastropods, spinicaudatans, plant remains, trace fossils, and rare ostracods. The Caldas Bed records benthic paleocommunities representing a short-term isochronous regional freshening event, marked by abrupt changes in sedimentation pattern, bathymetry, salinity, oxygenation and water chemistry.

show abstract

Section: Geological Settingmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this basin, the Barbalha, Crato, Ipubi and Romualdo formations, Santana Group, comprise three Aptian depositional sequences that are bounded by internal unconformities (Assine et al ., 2014). All depositional sequences record transgressive–regressive successions (Assine et al ., 2014), although only the latter (Romualdo Formation) is demonstrably linked to marine ingressions (see Beurlen, 1963; Custódio et al ., 2017; Fürsich et al ., 2019; Varejão et al ., 2019a; Rodrigues et al ., 2020; Melo et al ., 2020).…”

Section: Discussionmentioning

confidence: 99%

Mixed siliciclastic–carbonate sedimentation in an evolving epicontinental sea: Aptian record of marginal marine settings in the interior basins of north‐eastern Brazil

et al. 2021

Self Cite

View full text Add to dashboard Cite

The Aptian evaporitic transitional sequence (sag phase) of the Brazilian marginal basins records the first connection between the Central and South Atlantic oceans in the equatorial area. During this phase, lacustrine carbonate reservoirs and giant salt deposits developed in the southern basins of Santos and Campos, forming world-class petroleum reservoirs. The sag succession is also well-preserved in the interior rift basins of north-eastern Brazil, where upper Aptian strata are represented by a continuous section. This contribution presents an interpretation of the evolution of a third-order depositional sequence comprising lacustrine limestones, marine siliciclastic facies and evaporite deposits of the intracontinental Araripe Basin. The Lowstand Systems Tract is characterized by fluvial deposits filling accommodation generated during the syn-rift phase. The overlying deposits comprise marine facies with preservation of dinoflagellates and marine ichnotaxa, evidencing marine deposition in bayhead delta settings. The transgressive surface is represented by limestones, including the Konservat-Lagerst€ atte laminites, onlapping the basement rocks. Above, tide-dominated bay deposits with distinct subtidal, intertidal and supratidal portions are recorded. The Maximum Flooding Surface is a dark shale below foreshore to shoreface facies, marking the beginning of the Highstand Systems Tract, culminating with deposition of evaporites (gypsum and anhydrite). The stratigraphic architecture and palaeocurrents measured in different facies associations suggest that marine waters reached the basin from the south. The data unequivocally records late Aptian marine ingressions of an incipient South Atlantic Ocean over the interior basins of north-eastern Brazil, while lacustrine conditions were still prevailing in the Pre-Salt sag units of the Santos and Campos basins.

show abstract

“…Bioclast rudist floatstone-rudstone (MF 8) was deposited in an open marine environment (middle ramp). Moderate rates of abrasion and fragmentation of rudist shells are indicative of the influence of storm waves (Fürsich et al, 2019). Fragmentation and abrasion (low to moderate rates) of rudist shells into large fragments indicate occasional currents in the environment (Carannante et al, 2000;Ruberti and Toscano, 2002).…”

Section: Middle Rampmentioning

confidence: 99%

Biostratigraphy and Sequence Stratigraphy of the Tarbur Formation (Maastrichtian) from Iranian Zagros Foreland Basin, Southwest of Iran

Ghanbarloo

Safari

Vaziri‐Moghaddam

2022

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

Shallow carbonate deposits (Tarbur Formation) were formed in the Zagros foreland basin with dynamic tectonics during the Maastrichtian age. From the viewpoint of reconstruction of depositional conditions in these deposits, studies of biostratigraphy, microfacies, microtaphofacies, and sequence stratigraphy were performed in a single area at Tang-e Shabi Khoon, northwest of Zagros. Based on the identification of two assemblage zones consisting of benthic foraminifera in these strata, the formation was deposited during the middle to late Maastrichtian. The number of cycles in test size and type of coiling in Loftusia decreased from the study area toward the northwest of the Neotethys basin. The input of clastic sediments affected the distribution of Loftusia and rudists in the study area. Nine microfacies, six microtaphofacies, and one terrigenous facies (shale) were identified based on the sedimentary features. These deposits of the middle-late Maastrichtian were deposited on a homoclinal carbonate ramp. The platform can be divided into restricted and semi-restricted lagoon, shoal, and open marine environments. In the study area, the deposits of the Tarbur Formation were deposited during four third-order depositional sequences. Local fault activities affected the formation of depositional sequences in the study area.

show abstract

Analysis of a Cretaceous (late Aptian) high-stress ecosystem: The Romualdo Formation of the Araripe Basin, northeastern Brazil

Cited by 40 publications

References 40 publications

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

Marine or freshwater? Accessing the paleoenvironmental parameters of the Caldas Bed, a key marker bed in the Crato Formation (Araripe Basin, NE Brazil)

Mixed siliciclastic–carbonate sedimentation in an evolving epicontinental sea: Aptian record of marginal marine settings in the interior basins of north‐eastern Brazil

Biostratigraphy and Sequence Stratigraphy of the Tarbur Formation (Maastrichtian) from Iranian Zagros Foreland Basin, Southwest of Iran

Contact Info

Product

Resources

About