Results 51 to 60 of about 9,495 (248)
Plant, Cell &Environment, EarlyView.ABSTRACT The multi‐elemental profile has repeatedly been proposed as a reliable indicator of the geographical origin of plant‐derived foods, as mineral composition accurately reflects the local soil geochemistry and environmental factors. However, this approach may fail in distinguishing specimens from nearby locations, which are expected to be exposed
Ana Sayago +2 more
wiley +1 more source
Photoferrotrophy, BIF deposition, and iron-free oxygen oases in the Archean surface ocean [PDF]
, 2023 Sean A. Crowe, Anyang Ding, Guochun Zhao
openalex +1 more source
Microbial mats in dinosaur ichnocoenoses
Sedimentology, EarlyView.ABSTRACT Until now, the significance of microbial mats in preservation of dinosaur tracks and in reconstructing the palaeoenvironment in which dinosaurs roamed was rarely studied. Dinosaur tracks are commonly found close to ancient aquatic bodies where moist sediment had once allowed footstep registration.
Nora Noffke +3 more
wiley +1 more source
Journal of the Geological Survey of BrazilGamma-ray spectrometry, as well as magnetic and gravity data, are used to investigate the geophysical signatures of the Archean nuclei of the Borborema Province.
Roberto Gusmão de Oliveira +6 more
doaj +1 more source
The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)
Sedimentology, EarlyView.ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti +5 more
wiley +1 more source
UV radiation limited the expansion of cyanobacteria in early marine photic environments
Nature Communications, 2018 The means by which planktonic cyanobacteria were able to persist through the Archean despite high fluxes of UV radiation are unclear. Here, the authors show that Fe(III)-Si rich precipitates in the Archean photic zone could have provided early planktonic
Aleksandra M. Mloszewska +6 more
doaj +1 more source
Diminished greenhouse warming from Archean methane due to solar absorption lines [PDF]
Climate of the Past, 2015 Previous research has shown that methane may have been sustained at high concentrations in the Archean atmosphere, helping to offset lower insolation and solve the faint young sun problem.
B. Byrne, C. Goldblatt
doaj +1 more source
Sedimentology, EarlyView.ABSTRACT One of the largest wetlands on Earth, the Brazilian Pantanal contains roughly 10 000 natural lakes, about 1000 of which are hypersaline. In these environmentally stressful settings, animal life struggles to survive, while cyanobacteria form extensive mats.
Lucas V. Warren +5 more
wiley +1 more source
Geological review of a quarry section at Cosăuţi from Archean Eon [PDF]
, 2022 Nicolae Anastasiu
openalex +1 more source
Terra Nova, EarlyView.ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen +3 more
wiley +1 more source