Results 11 to 20 of about 4,715 (199)

Evolução sedimentar miocênica nos estados do Pará e Maranhão [PDF]

open access: yesGeologia USP. Série Científica, 2006
Depósitos miocênicos, designados litoestratigraficamente de formações Pirabas e Barreiras, acham-se bem expostos no nordeste do Pará e litoral do Maranhão, onde são representados por uma variedade de fácies carbonáticas a siliciclásticas.
Dilce de Fátima Rossetti
doaj   +2 more sources

Fitólitos – Uma ferramenta para estudos de reconstituição paleoambiental

open access: yesDerbyana, 2022
Os fitólitos são estruturas microscópicas de sílica (SiO2.nH2O) produzidos nos tecidos vegetais. O interesse pelo estudo dos fitólitos tem crescido significativamente nos últimos anos no Brasil e no mundo devido a sua grande variedade de usos, desde a arqueologia até a medicina legal e por sua natureza altamente interdisciplinar.
Marcia Regina Calegari   +4 more
openaire   +3 more sources

The oldest dairoidid crab (Decapoda, Brachyura, Parthenopoidea) from the Eocene of Spain

open access: yesPapers in Palaeontology, Volume 9, Issue 3, May/June 2023., 2023
Abstract Eubrachyurans, or ‘higher’ true crabs, are the most speciose group of decapod crustaceans and have a rich fossil record extending into the Early Cretaceous. However, most extant families are first found in the fossil record in the Palaeogene, and particularly in the Eocene.
Fernando A. Ferratges   +5 more
wiley   +1 more source

Pequeños vertebrados del relleno kárstico del Pleistoceno Superior de Avetrana (Apulia, Sur de Italia)

open access: yesEstudios Geologicos, 2020
El depósito (cavidad kárstica) de La Grave, localidad cercana a la pequeña ciudad de Avetrana (Tarento, Italia meridional), ha dado lugar a numerosos fósiles de vertebrados. Los restos de grandes mamíferos han sido objeto de varios estudios.
T. Kotsakis   +5 more
doaj   +1 more source

Estratigrafia e paleoambiente em Lapas Cabreiras

open access: diamondKairós
Antonio Martı́nez Cortizas   +6 more
openalex   +4 more sources

Chicxulub crater post-impact hydrothermal activity – evidence from Paleocene carbonates in the Santa Elena borehole

open access: yesGeofísica Internacional, 2010
Los cráteres de impacto se caracterizan por sistemas hidrotermales activos; particularmente en aquellos formados en ambientes marinos, en los cuales los procesos convectivos incluyen fluidos hidrotermales y agua de mar.
J. E. Escobar-Sanchez   +1 more
doaj   +1 more source

Environmental and climatic proxies for the Cañadón Asfalto and Neuquén basins (Patagonia, Argentina): review of middle to upper jurassic continental and near coastal sequences [PDF]

open access: yes, 2015
In this review, we include several proxies (sedimentology, palynology, invertebrates) from the Cañadón Asfalto and Neuquén basins, to infer the environments and regional climatic context during the Middle to Late Jurassic of Patagonia.
Cabaleri, Nora Graciela   +6 more
core   +1 more source

Volcano-sedimentary stratigraphy in the Valsequillo Basin, Central Mexico inferred from electrical resistivity soundings

open access: yesGeofísica Internacional, 2014
La estratigrafía de la secuencia volcano-sedimentaria en la cuenca de Valsequillo, Puebla es investigada por medio de sondeos eléctricos de resistividad.
Jaime Urrutia-Fucugauchi   +5 more
doaj   +1 more source

Local extinctions in the small mammal's assemblages between late Holocene and historical times in Talagapa mountains (Patagonia, Argentina): The role of land use changes [PDF]

open access: yes, 2016
The aim of this work was to evaluate possible changes in the small mammal composition in the Patagonian arid Extra-Andean steppes between the late Holocene and historical times.
Andrade, Analia, Monjeau, Jorge Adrian
core   +1 more source

Testing the Usefulness of the Surface Collecting Method in a Vertebrate Microfossil Site from the Barremian of Spain (Los Menires, Mirambel Formation)

open access: yesDiversity, 2023
Surface collecting is the first and sometimes the only type of sampling carried out in many fossiliferous localities, including vertebrate microfossil assemblages. Nevertheless, it is rare to test how representative these surface-collected samples are of
José M. Gasca   +4 more
doaj   +1 more source

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