A5065570896- Plant Diversity and Evolution
- Paleontology and Stratigraphy of Fossils
- Fern and Epiphyte Biology
- Geological formations and processes
- Geology and Paleoclimatology Research
- Paleontology and Evolutionary Biology
- Plant and Fungal Species Descriptions
- Plant and animal studies
- Evolution and Paleontology Studies
- Geochemistry and Geologic Mapping
- Fish biology, ecology, and behavior
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Geography and Environmental Studies
- Ecology and Vegetation Dynamics Studies
- Plant Parasitism and Resistance
- Clay minerals and soil interactions
- Marine and coastal plant biology
- Polar Research and Ecology
- Marine and environmental studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Methane Hydrates and Related Phenomena
- Botany, Ecology, and Taxonomy Studies
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
Universidade Federal do Rio Grande do Sul
2015-2024
Universidade Federal do Rio Grande
2018-2022
Universidade Estadual de Roraima
2022
Universidade Federal do Ceará
2022
Instituto de Geociencias
1999-2018
Universidad Ricardo Palma
2015
University of Pennsylvania
2015
Museu de Ciências Naturais da Fundação Zoobotânica do Rio Grande do Sul
2013
Universidad Mariana
2012
Governo do Estado do Rio Grande do Sul
2009
Research Article| January 04, 2018 A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of penultimate icehouse (Paraná Basin, Brazil) Neil Patrick Griffis; Griffis † 1Department Earth Planetary Sciences, University California, Davis, California 95616, USA †npgriffis@ucdavis.edu Search other works by this author on: GSW Google Scholar Roland Mundil; Mundil 2Berkeley Geochronology Center, Berkeley, 94709, Isabel Patricia Montañez; Montañez John...
Abstract The demise of the Late Paleozoic Ice Age has been hypothesized as diachronous, occurring first in western South America and progressing eastward across Africa culminating Australia over an ∼60 m.y. period, suggesting tectonic forcing mechanisms that operate on time scales 106 yr or longer. We test this diachronous deglaciation hypothesis for southwestern south-central Gondwana with new single crystal U-Pb zircon chemical abrasion thermal ionizing mass spectrometry (CA-TIMS) ages...
Abstract Icehouse climate systems occur across an abbreviated portion of Earth history, constituting c. 25% the Phanerozoic record. The Late Paleozoic Ice Age (LPIA) was most extreme and longest lasting glaciation is characterized by periods acute continental-scale glaciation, separated ice minima or ice-free conditions on order <10 6 years. late glaciogenic record Paraná Kalahari basins southern Gondwana form one largest, best-preserved well-calibrated records this glaciation. In...
Abstract The response of sediment routing to climatic changes across icehouse-to-greenhouse turnovers is not well documented in Earth's pre-Cenozoic sedimentary record. Southwest Gondwana hosts one the thickest and most laterally extensive records penultimate icehouse, late Paleozoic ice age. We present first high-resolution U-Pb zircon chemical abrasion–isotope dilution–thermal ionization mass spectrometry (CA-ID-TIMS) analysis age deposits Kalahari Basin southern Africa, which, coupled...
Abstract Although Permian fossils have been known from the Parnaíba Basin for two centuries, and some faunal flora elements are well worldwide, research on fossil assemblages this basin has lagged relative to other, more accessible basins. In last decade, however, there a significant increase in study of units basin: Pedra de Fogo Motuca formations. The goal contribution is synthesize update existing data macrofossils these formations, use them address biostratigraphic, palaeoenvironmental...
Other| December 01, 2002 A Pre-Glacial, Warm-Temperate Floral Belt in Gondwana (Late Visean, Early Carboniferous) ROBERTO IANNUZZI; IANNUZZI 1Departamento de Paleontologia e Estratigrafia, Instituto Geociências, Universidade Federal do Rio Grande Sul, Av. Bento Gonçalves, 9500, Porto Alegre, 91.509-900, Brazil Search for other works by this author on: GSW Google Scholar HERMANN W. PFEFFERKORN 2Department of Earth and Environmental Science, University Pennsylvania, Philadelphia, PA 19104-6316...
We describe three specimens from a Late Mississippian (earliest Serpukhovian) pteridosperm (seed fern) Triphyllopteris austrina (Etheridge Jr.) Morris, of probable lyginopterid affinities, which originates the Sugar Loaf Creek locality Sydney Basin, Australia. These provide six examples folivory assigned to ichnotaxon Phagophytichnus ekowskiivan Amerom 1966. This damage is earliest example in terrestrial fossil record and probably was produced by “protorthopteroid” or other basal...
Arthropods and land plants are the major macroscopic sources of biodiversity on planet. Knowledge organization specialization plant-herbivore interactions, such as their roles in food webs is important for understanding processes maintaining biodiversity. A limited number studies have examined herbivory through geological time. The most analyzed localities from one restricted interval within a period, or time transition Paleocene-Eocene boundary interval. In present study, we frequency...
Abstract The Pennsylvanian on the western rim of Gondwana can be considered a time significant contrasts in terms environments, revealing unique translatitudinal disposition South American continent, where glaciomarine deposits and peat-forming situated further south, coexisted with marine carbonate platforms aeolian dune fields, terrains north. This peculiar record creates an opportunity to better understand teleconnections glaciation deglaciation during Late Paleozoic Ice Age (LPIA)...
This paper presents new data about Early Permian (Cisuralian) strata, palynostratigraphy and absolute dating from the Copacabana Formation in central Bolivia. Recent stratigraphic palynologic marine transitional rocks at Apillapampa refine age of Cisuralian palynomorphs South America. Twelve samples interbedded with five volcanic ashes (processed productive) yielded 94 palynomorph species arranged two informal palynoassemblages: lower assemblage Vittatina costabilis corresponds to one sample...
The sedimentary section at the Quitéria outcrop (Pantano Grande, central portion of Rio Grande do Sul State, Brazil) carries diverse and abundant fossil associations plants palynomorphs. This includes coal deposits Early Permian Bonito Formation in Paraná Basin. contribution presents a taxonomic re-evaluation on paleobotanical records based an in-depth revision available data as well direct analysis from materials deposited collections (published unpublished). A list is presented, anlysis...