Early Cretaceous coniferous woods from a paleoerg (Paraná Basin, Brazil)

Pires, Etiene Fabbrin; Guerra-Sommer, Margót; Scherer, Claiton Marlon dos Santos; Santos, Adriano Rodrigues dos; Cardoso, Edivane

doi:10.1016/j.jsames.2011.04.001

Cited by 24 publications

(14 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The only plant fossils from the Botucatu Formation are conifer trunks, found in the region of Araguari (Minas Gerais State), north of the Tringulo Mineiro, within the limits of the sandstone occurrence area of this unit (Pires et al, 2011;Malaquias, Riff & Riff, 2017). Those trunks exhibit xylophagous marks assigned to termites (Isoptera) and beetles (Coleoptera) (Riff, Kloster & Riff, 2017).…”

Section: Previous Workmentioning

confidence: 99%

A new insect trackway from the Upper Jurassic—Lower Cretaceous eolian sandstones of São Paulo State, Brazil: implications for reconstructing desert paleoecology

Peixoto

Mángano

Minter

et al. 2020

PeerJ

View full text Add to dashboard Cite

The new ichnospecies Paleohelcura araraquarensis isp. nov. is described from the Upper Jurassic-Lower Cretaceous Botucatu Formation of Brazil. This formation records a gigantic eolian sand sea (erg), formed under an arid climate in the south-central part of Gondwana. This trackway is composed of two track rows, whose internal width is less than one-quarter of the external width, with alternating to staggered series, consisting of three elliptical tracks that can vary from slightly elongated to tapered or circular. The trackways were found in yellowish/reddish sandstone in a quarry in the Araraquara municipality, São Paulo State. Comparisons with neoichnological studies and morphological inferences indicate that the producer of Paleohelcura araraquarensis isp. nov. was most likely a pterygote insect, and so could have fulfilled one of the ecological roles that different species of this group are capable of performing in dune deserts. The producer could have had a herbivorous or carnivorous diet or been part of the fauna of omnivores, being able to adopt herbivorous, carnivorous, and saprophagous diets when necessary. In modern dune deserts, some species of pterygote insects are detritivores (like Tenebrionidae), relying on organic matter that accumulated among the sand grains of the dunes during dry periods with no plant growth. The presence of additional burrows suggests that the Botucatu paleodesert would have had a detritivorous fauna like this. Based on the interpretation of the ichnofossil producers, it was possible to reconstruct the food web of this paleodesert. All the omnivorous and herbivorous invertebrates and the herbivorous ornithopod dinosaurs made up the primary consumers. These animals were, in turn, the food source for bigger carnivorous or omnivorous animals unable to feed on detritus, like arachnids, possible predatory insects, mammaliaforms, and theropod dinosaurs. The highest trophic level was occupied by larger theropod dinosaurs and mammaliaforms, which, because of their size, could prey upon a wide range of animals. The producer of Paleohelcura araraquarensis isp. nov. could have been a primary consumer if it were an omnivorous detritivore or a herbivore, or a secondary consumer if it were produced by a predatory insect or an omnivore relying on animal biomass. The description of this new trackway expands the knowledge on the faunal composition of the Botucatu paleodesert and provides insights into the ecological relationships in ancient deserts. The presence of these arthropod trackways in Mesozoic eolian deposits helps to trace a continuity between Paleozoic and post-Paleozoic desert ichnofaunas, further reinforcing a single Octopodichnus—Entradichnus Ichnofacies for eolian deposits.

show abstract

Section: Previous Workmentioning

confidence: 99%

A new insect trackway from the Upper Jurassic—Lower Cretaceous eolian sandstones of São Paulo State, Brazil: implications for reconstructing desert paleoecology

Peixoto

Mángano

Minter

et al. 2020

PeerJ

View full text Add to dashboard Cite

show abstract

“…Ostracod fossils were found in three of the four lacustrine deposits. Fossilized conifer woods were described in Botucatu Formation, near Uberlândia city (Pires et al 2011).…”

Section: Geological Contextmentioning

confidence: 99%

Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil

2018

View full text Add to dashboard Cite

This study covers the region between the cities of Sacramento and Araguari/Uberlândia (Minas Gerais State, Brazil), where basalt flows from the Paraná Continental Magmatic Province outcrop. The investigated rocks present tholeiitic signature, with high titanium content, and are classified as Pitanga magma-type. The preserved basalt thickness is between 10 and 200 meters and individual flows do not exceed 15 meters thick. Flows were identified as sheet lobes, smaller and thinner flows units-stacked laterally and vertically forming compound lavas-, or frontal, centimetric lobes. The basalt flows show decimetric to metric intercalations of clastic sedimentary rock, with depositional characteristics that can vary from aeolian to lacustrine, and are important markers on prevailing environmental conditions. The plagioclases are dominantly labradorite and pyroxene is augite, whereas olivine can be hyalosiderite or hortonolite/ferrohortonolite. The behavior of the major, minor and trace elements is compatible with the presence of at least two parental magmas, which were subjected to fractional crystallization mainly of plagioclase, clinopyroxene, ilmenite and magnetite. There is a chemistry distinction between basalts from Sacramento to those from Araguari/Uberlândia region, the former one showing more evolved than the last one. The high (La/Lu)N values are indicative of partial melting of a garnet peridotite, while the Rare Earth Elements (REE) values are indicative of fractional crystallization.

show abstract

“…The Solari/Botucatú Formation comprises a dry-aeolian system developed in western Gondwana, and at present covers territories of Brazil, Uruguay, Argentina, Paraguay, Namibia, and South Africa (Scherer, 2000;Scherer & Goldberg, 2007) . Fossil plants from this Formation are scarce, with only three records of fossil woods from Brazil (Suguio & Coimbra, 1972;Mussa, 1974;Pires et al, 2011). Besides, this study on the outcropping rock sequence in the Paraje Tres Cerros represents an important opportunity to understand the dynamics and diversity of 'the Botucatú Desert' in Northeast Argentina.…”

mentioning

confidence: 91%

Conifer Fossil Woods from the Late Jurassic–Early Cretaceous (Solari/Botucatú Formation) of the Paraje Tres Cerros (Corrientes Province), Northeast Argentina

et al. 2023

View full text Add to dashboard Cite

show abstract

Early Cretaceous coniferous woods from a paleoerg (Paraná Basin, Brazil)

Cited by 24 publications

References 36 publications

A new insect trackway from the Upper Jurassic—Lower Cretaceous eolian sandstones of São Paulo State, Brazil: implications for reconstructing desert paleoecology

A new insect trackway from the Upper Jurassic—Lower Cretaceous eolian sandstones of São Paulo State, Brazil: implications for reconstructing desert paleoecology

Geology, geochemistry and petrology of basalts from Paraná Continental Magmatic Province in the Araguari, Uberlândia, Uberaba and Sacramento regions, Minas Gerais state, Brazil

Conifer Fossil Woods from the Late Jurassic–Early Cretaceous (Solari/Botucatú Formation) of the Paraje Tres Cerros (Corrientes Province), Northeast Argentina

Contact Info

Product

Resources

About