Now showing items 1-4 of 4
Permian endemic bivalves of the Irati anoxic event, Parana Basin, Brazil: Taphonomical, paleogeographical and evolutionary implications
(Palaeogeography Palaeoclimatology Palaeoecology, 2017-03-01) [Artigo]
Anoxic to dysoxic conditions must have existed in the Parana Basin during the deposition of the Permian oil-bearing shales of the Irati Formation, reflecting the marine isolation of the basin from the Panthalassic Ocean. ...
Paleoecology and paleoenvironments of Permian bivalves of the Serra Alta Formation, Brazil: Ordinary suspension feeders or Late Paleozoic Gondwana seep organisms?
(Journal Of South American Earth Sciences, 2017-08-01) [Artigo]
This is the first record of a Permian seep deposit and an associated, morphologically bizarre, bivalve-dominated fauna from the Passa Dois Group, Parana Basin, Brazil. Shales of the outer-shelf facies of the Serra Alta ...
A new Permian bivalve-dominated assemblage in the Rio do Rasto Formation, Parana Basin, Brazil: Faunal turnover driven by regional-scale environmental changes in a vast epeiric sea
(Journal Of South American Earth Sciences, 2015-12-01) [Artigo]
The basal portion of the Permian Rio do Rasto Formation (Serrinha Member), Passa Dois Group, Parana Basin, Brazil, records an entirely new bivalve fauna intercalated between the underlying Pinzonella neotropica assemblage ...
The interplay between event and background sedimentation and the origin of fossil-rich carbonate concretions: a case study in Permian rocks of the Paraná Basin, Brazil
(Lethaia, 2015) [Artigo]
The Permian Serra Alta Formation was generated under transgressive conditionswithin a large, calm epeiric sea. A monotonous succession of ‘barren’, massive mud-stones deposited under oxygen-deﬁcient conditions (mainly below ...