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Registros recuperados: 3
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A new angiosperm from the Crato Formation (Araripe Basin, Brazil) and comments on the Early Cretaceous Monocotyledons Anais da ABC (AABC)
LIMA,FLAVIANA J. DE; SARAIVA,ANTÔNIO A.F.; SILVA,MARIA A.P. DA; BANTIM,RENAN A.M.; SAYÃO,JULIANA M..
The Crato Formation paleoflora is one of the few equatorial floras of the Early Cretaceous. It is diverse, with many angiosperms, especially representatives of the clades magnoliids, monocotyledons and eudicots, which confirms the assumption that angiosperm diversity during the last part of the Early Cretaceous was reasonably high. The morphology of a new fossil monocot is studied and compared to all other Smilacaceae genus, especially in the venation. Cratosmilax jacksoni gen. et sp. nov. can be related to the Smilacaceae family, becoming the oldest record of the family so far. Cratosmilax jacksoni is a single mesophilic leaf with entire margins, ovate shape, with acute apex and base, four venation orders and main acrodromous veins. It is the first...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripe Basin; Cratosmilax jacksoni; Cretaceous; Fossil leaf; Gondwana; Monocots.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401657
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New evidence of feathers in the Crato Formation supporting a reappraisal on the presence of Aves Anais da ABC (AABC)
Sayão,Juliana M.; Saraiva,Antonio A.F.; Uejima,Angelica M.K..
The preservation of delicate structures such as feathers is very rare in the paleontological record, due to the fragility of their components. Fossil feathers have been reported from approximately 50 deposits around the world, from the Late Jurassic to the Pleistocene. In Brazil initial findings consisted of a primary feather of a large bird found in the Tremembé Formation. Other occurrences are preserved in the Crato Formation, where several symmetrical and one single asymmetrical feather was found. Based on three new specimens and reassessing further feather occurrences we cannot confirm the presence of volant Aves in this deposit. The presence of an asymmetrical feather without barbules and hooks hints at the previous existence of a flightless animal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripe Basin; Crato Formation; Cretaceous; Feathers; Theropod.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000100010
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Stratigraphic Relations of the Ipubi Formation: Siliciclastic-Evaporitic Succession of the Araripe Basin Anais da ABC (AABC)
FABIN,CARLOS E.; CORREIA FILHO,OSVALDO J.; ALENCAR,MÁRCIO L.; BARBOSA,JOSÉ A.; MIRANDA,TIAGO S. DE; NEUMANN,VIRGÍNIO H.; GOMES,IGOR F.; SANTANA,FELIPE R. DE.
ABSTRACT The Ipubi Formation represents the Aptian-Albian siliciclastic-evaporitic succession of Araripe Basin, NE Brazil. This succession comprises siliciclastic rocks (bituminous shales and claystones) and evaporites (gypsum and secondary anhydrite) and represents part of the lacustrine-shallow marine post-rift phase I. This study used sequence stratigraphy concepts to define the relations between changes in the relative lake level and the formation of Ipubi deposits. Results show that the organic-rich shales of the Ipubi Formation formed during a transgressive pulse that covered large areas of the proximal domains. These deposits overlie a regional unconformity that marks the end of the deposition of the underlying Crato Formation. A High Stand stage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araripe Basin; Evaporite succession; Interior basins; Ipubi Formation; Sequence stratigraphy.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502049
Registros recuperados: 3
Primeira ... 1 ... Última
 

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