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Resumo O transporte médio anual de sedimentos em suspensão no rio Amazonas, em Óbidos, Brasil, foi estimado, a partir de novas medições, em 0,8 a 0,9 x109 ton. ano. A maior parte destes sedimentos é lançada na pla...

The lowermost part of the Agua de la Mula Member (upper Hauterivian), Agrio Formation, was studied in distal depositional settings at four locations in the central Neuquén Basin. Detailed sedimentological and ichnologic...

Sediment deposits formed mainly under the influence of bottom currents (contourites) are widely used as high-resolution archives for reconstructing past ocean conditions. However, the driving processes of Contourite Depo...

Abstract Microplastic pollution in freshwater is a global concern, yet field monitoring often lacks standardization, hindering data comparability and analysis. This systematic review bridges the gap between lab findings ...

River confluences are notable features in the drainage system with complex hydrodynamics, bed morphology, sediment transport, and mixing processes. Junction planform plays a pivotal role in the confluence hydrodynamics. ...

Submarine landslides can generate complicated patterns of seafloor relief that influence subsequent flow behaviour and sediment dispersal patterns. In subsurface studies, the term mass transport deposits (MTDs) is common...

Different morphotypes of vertically embedded ammonoid shells are abundant in the 1-km-thick deposits of the Santa Marta Formation, Antarctica, that record the evolution of a deep-water delta system. Vertical shells depos...

Abstract A local tropical cyclone (TC) in South China Sea was observed making its first complete landfall on an island. Following the arrival of the TC eye, PM2.5 concentration rose from 4 µg/m³ to 44 µg/m³. Mass r...

The aim of this work is to assess the risk of groundwater contamination associated with BTEX dissolution from fuels as a residual phase. Numerical simulations of sixty scenarios were carried out with the software HYDRUS ...

Abstract Quantifying luminescence signal resetting of sand grains in turbid waters is essential for both sediment dating and tracing, yet direct measurement under natural subaqueous conditions remain scarce. Here, we pre...

Abstract Submarine fan deposits are important archives of Earth's history and serve as the record of turbidity current events that transfer large amounts of terrestrial sediment and carbon into the ocean. The geomorpholo...

Abstract Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants of global concern due to their widespread occurrence, environmental persistence, and well-documented adverse effects on human health. In ...

Abstract Lead (Pb) isotopes are powerful tools for tracing dust provenance and reconstructing paleoclimate. However, variations in Pb isotopic compositions among different grain‐size fractions in sediments complicate t...

La Formación Vinchina fue depositada entre los 16 y 8 Ma en una cuenca de antepaís fracturada del noroeste de la Argentina, registrando sedimentación en ambientes continentales, alcanzando un espesor de 6 kilómetros....

Abstract This study examines the geological and climatic factors that influence natural radioactivity levels in drinking water from Dessie and Kombolcha towns in Ethiopia’s northern plateau. The basaltic and sedimentar...

Underwater gas pipelines are vital for energy transportation but are often subjected to harsh environments, and any leakage can have significant environmental consequences. Substantial underestimation of gas plume format...

We investigate the use of Hg as a proxy for volcanism by studying four distal and two proximal sections in relation to the Deccan volcanic center, straddling the Cretaceous-Paleogene (KPg) boundary at (a) Højerup (Denma...

El estudio sedimentológico de los depósitos fluviales del río Colorado fue escogido como tema de Tesis Doctoral con la finalidad de desarrollar en nuestro país el conocimiento de la dinámica de la sedimentación en ...

La espiga Península el Páramo, situada al norte de la Isla Grande de la Tierra del Fuego, prograda longitudinal mente hacia el sur y lateralmente hacia el oeste. Este comportamiento la ubica en la categoría de las esp...

The Argentine Continental Margin (ACM) comprises one of the largest contourite depositional systems worldwide, with evidences of strong gravitational downslope and alongslope sediment transport processes. Strong bottom c...

He estudiado veintidós muestras del Cerro Roth y sus correspondientes cortes delgados. Los acontecimientos geológicos que se pueden deducir del estudio de las muestras que he podido examinar son los siguientes: Efusi...

El estudio que se presenta en este trabajo de tesis doctoral trata sobre el reconocimiento y análisis de los controles de origen estructural y volcánico que regularon la acumulación del relleno de sinrift en la Cuenca...

En la presente tesis se investigan los efectos de algunas perturbaciones antropogénicas, frecuentes en el área pampeana, sobre la taxocenosis de diatomeas epipélicas de algunos sistemas lóticos.En el capítulo 1 se r...