Palynostratigraphy of the Chapada Group and its significance in the Devonian stratigraphy of the Paraná Basin, south Brazil

Grahn, Yngve; Mauller, Paula Mendlowicz; Pereira, Egberto; Loboziak, Stanislas

doi:10.1016/j.jsames.2009.09.001

Cited by 53 publications

(42 citation statements)

References 25 publications

(53 reference statements)

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“…R. magnifica, found ca. 1 m above the base of Chapada Group unit 2 south of Amorinópolis, the age was determined as latest Pragian-early Emsian for the lower Chapada Group unit 2 in that region (Grahn et al, 2000(Grahn et al, , 2010b. A more detailed investigation of the GO 1 section in this paper confirms the relative dating for the Chapada Group lower unit 2 below Chapada Group unit 3 (Figure 2).…”

Section: Introductionsupporting

confidence: 68%

“…The acritarch species Duvernaysphaera angelae Deunff, 1964 and the chitinozoan species Alpenachitina eisenacki Dunn & Miller, 1964, ?Ancyrochitina flexuosa Burjack, 1996, and Eisenackitina aranea Urban, 1972 (Figure 6) occur. The fossils indicate the lower Chapada Group 4 (Grahn et al, 2010b) and an early Givetian age. Daemon in Andrade & Camarço (1978) dated the lower part of Chapada Group 4 with spores as Givetian s.l.…”

Section: Studied Localitiesmentioning

confidence: 96%

“…4 m bioturbated siltstones ( Figure 3) (Carbonaro & Ghilardi, 2016). The palynomorphs indicate the lower Chapada Group 2 (Grahn et al, 2010b) and a latest Pragian-early Emsian age (PoW Su spore Zone).…”

Section: Studied Localitiesmentioning

confidence: 99%

“…The age relations between the Água Bonita Formation sandstones and those of the Paraná and Parnaíba basins are uncertain. As pointed out by Melo (1988), the lithologies of the Água Bonita sandstones have nothing in common with the sandstones in Chapada Group unit 3 (Paraná Basin; Grahn et al, 2010b). They are here considered as contemporaneous to the Furnas Formation/Chapada Group unit 1 in the Paraná Basin based on lithological criteria (Figure 2).…”

Section: Introductionmentioning

confidence: 99%

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A marine connection between Parnaíba and Paraná basins during the Eifelian/Givetian transition: review and new data

Grahn¹,

Horodyski

Mauller³

et al. 2017

Rev. bras. paleontol.

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-A long-lived marine seaway between the Parnaíba and Paraná basins occurred during a global marine transgression between Brazilian intracratonic basins (except for the Solimões Basin) in the latest Eifelian/earliest Givetian (Middle Devonian). As a result of this transgression a catastrophic event (KAČÁK) in combination with the immigration of warm water Appalachian and Old World faunas contributed to the collapse of the Malvinokaffric Realm in the Paraná Basin. In the Alto Garҫas and Apucarana sub-basins, the transgression is notable in the early Givetian with an impoverished shelly fauna following the KAČÁK post-extinction event in the earliest Givetian.

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Section: Introductionsupporting

confidence: 68%

Section: Studied Localitiesmentioning

confidence: 96%

Section: Studied Localitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A marine connection between Parnaíba and Paraná basins during the Eifelian/Givetian transition: review and new data

Grahn¹,

Horodyski

Mauller³

et al. 2017

Rev. bras. paleontol.

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“…No entanto, a relação de contato entre as formações Furnas e Ponta Grossa é controversa, sendo a mesma caracterizada de forma distinta por diferentes autores. Recentemente, Grahn et al (2010a) e Grahn et al (2010b) apresentaram uma discussão detalhada sobre essa relação de contato nas sub-bacias de Apucarana e de Alto Garças.…”

Section: áRea De Estudounclassified

Ocorrência de Ironstones no Devoniano da Bacia do Paraná

Oliveira

Pereira

2011

RBG

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Resumo A origem de ironstones oolíticos, preservados no registro sedimentar, tem sido assunto de muitos debates nas últimas décadas. Tais depósitos formam importantes unidades no registro paleozoico e a determinação de seu signifi cado sedimentológico e estratigráfi co é fundamental na interpretação do contexto deposicional dessas sucessões sedimentares. Os ironstones oolíticos da Formação Ponta Grossa estão intimamente associados aos limites de sequência e subsequentes superfícies transgressivas. Essas unidades foram descritas a partir da análise de um furo de sondagem localizado no noroeste da Bacia do Paraná. Esses ooides teriam sido depositados sob baixa taxa de sedimentação em condições marinha rasas, intercalados a eventos transgressivos episódicos, os quais retrabalhariam esses sedimentos. A descrição da evolução diagenética destes ooides de ferro foi feita através de estudos petrográfi cos e análises de difratometria de raios-X e de microscopia eletrônica de varredura (MEV). Tais análises indicam que a mineralogia dos ooides foi gerada durante a eodiagênese. Os ironstones são constituídos, principalmente, por ooides e cutículas de bertierina, cimento de siderita preenchendo os poros e por calcita ferrosa tardia. O intervalo oolítico estudado apresenta-se no furo de sondagem com laminação ondulada truncada. Esse aspecto faciológico reforça a ideia de que as condições necessárias para o desenvolvimento dos depósitos de ironstones oolíticos foi o intenso retrabalhamento sedimentar, unido às baixas taxas de acumulação.Palavras-chave: ironstone, diagênese, estratigrafi a de sequências, Bacia do Paraná. Abstract Ironstone ocurrence in the Devonian of the Parana Basin.The ooidal ironstones origin preserved in the sedimentary record has been subject of many discussions in the last decades. These deposits form prominent units in the Paleozoic record, and an assessment of their sedimentological and stratigraphic signifi cance is essential for the interpretation of sedimentary successions. The ooidal ironstones from the Ponta Grossa Formation are associated with a major sequence boundary and subsequent transgressive surface. These ooidal ironstones were described in a borehole located in the north part of Paraná Basin. They were interpreted as they had been deposited under conditions of low net sediment accumulation with episodic storm events reworking the sediments, in a shallow-marine environment. Through petrographic studies, X-ray diffraction, and scanning electron microscope (SEM) analyses made possible the depiction of the ooidal ironstones diagenetic evolution. Such analyses indicate that the ooidal ironstone mineralogy was formed during eodiagenesis. The ironstones are dominated by berthierine ooids and grain-rimming and pore-fi lling siderite, with later ferroan calcite. The ooidal interval observed in the borehole presented wave cross lamination. This faciologic aspect reinforces the idea that the conditions required for the development of the ironstones deposits were intense sediment reworking and slow n...

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