The complex landscapes of tropical monsoonal lowlands make water resource estimates difficult, given sparsely distributed monitoring networks. Satellite radiometry has facilitated increased access to environmental data. Here, we use radiometric indices to analyze the Taquari megafan and identify features of the Pantanal subregions that characterize it. Recent periods of strong droughts and floods were

The paleosols, due to their potential as paleoenvironmental and stratigraphic proxies, are widely used in studies of paleolandscape and paleoclimate reconstructions. As it constitutes one of the main climatic elements, the mapping of precipitation represents an indispensable factor in the determination of climatic conditions. Thus, the article aimed to map the distribution patterns of Maastrichtian

The Triassic deposits of South America are key to understand the early radiation of Dinosauromorpha. Though the fossil record of the group is relatively abundant in Carnian- and Norian-aged strata from Argentina and Brazil, Middle Triassic dinosauromorphs are scarce, at least in the Brazilian record. In this contribution, we describe a set of fossils collected from a site biostratigraphically correlated

Arc magmatism in a continental subduction zone facilitates rheological weakening of the rigid upper plate, and can accommodate the partitioned trench-parallel component of oblique subduction into an intra-arc shear zone. We document a shear zone at latitude 25.4° S near Taltal, Chile that was associated with intrusion of the Matancilla Plutonic Complex at ∼169 Ma to evaluate intra-arc deformation and

The purpose of this paper is to analyze the morphology of the Quaternary relict features and bedforms that characterize the outer zone of an extensive mesomareal system, which is part of the Bahía Blanca estuary (Argentina), and to estimate the prevailing hydro-sedimentological conditions on the continental shelf adjacent to the estuary. Surveys with a multibeam bathymetric system, side-scan sonar

Soil degradation is a major challenge in the 21st Century. Tropical regions are having the strongest expansion in agricultural lands. Therefore, novel researches on the soil degradation process are imperative to prevent damage to social and environmental dynamics. The main goal of this research was to generate a Soil Degradation Index in a tropical region that includes the entire agricultural areas

This work analyses seismic signals at the Irazú volcano (83°51′09″ W, 9°58′45″ N; active stratovolcano in Central America) in a continuous 34-day record beginning April 13, 2013. Since December 2012, the activity of the volcano has been increasing and along with it the frequency occurrence of certain long-period (LP) signals. In this work, 6 families of LP signals were identified, with 83 total events

Magnitude conversions between different scales are important for comparison of seismic activity between different regions, homogenization of earthquake catalogs for seismic hazard calculations, and use of ground motion relations derived from other regions. Despite the trend of adopting Mw as the standard, reference magnitude scale, other scales are still much used for practical reasons and ease of

The present-day structure of the Eastern Cordillera in NW Argentina is governed by structural and lithological heterogeneities inherited from preceding deformational phases, which influence the localization of newly-formed faults and the inversion of pre-existing structures. The Salta Rift Basin formed during a Late Jurassic-Cretaceous extensional phase and created a dominant structural and stratigraphic

Post-collisional reversely zoned plutons occurring in the Araçuaí belt frequently show basic cores enveloped by felsic rocks, with intense magma mingling/mixing features. The Venda Nova (VN) pluton presents, in addition to its mafic core composed of gabbronorites and surrounded by syenomonzonites, a narrow ring of charnockite and norite. The Venda Nova pluton is considered as a marker of the last magmatic

The palaeobiogeographic distribution of the Ludlow‒Přídolí and Devonian Bivalves in the Bolivian Central Andean Basin of Western Gondwana, has been established from the study of twenty-five genera, twenty-two of which are considered cosmopolitan and three endemics. Taking into account the total studied genera, seven correspond to Protobranchia, such as Praectenodonta, Praenucula, Notonucula, Nuculites

The Paraná Basin coalfields of southern Brazil belong to the Permian Gondwana I Supersequence interval. The coals generally experienced low burial temperatures at the basin edges, but local igneous intrusions of the Paraná superplume (Cretaceous) altered their previous thermal conditions. The Santa Terezinha, Chico-Lomã, and Morungava coalfields are considered to be the most proliferous thermally altered

The Ceará Central Domain (CCD) is part of the Borborema Province and is delimited by two major NE-SW-trending strike-slip zones associated with the Transbrasiliano and Senador Pompeu lineaments. These two strike-slip zones formed in Neoproterozoic/Early Cambrian times under ductile conditions and underwent several brittle-ductile and brittle reactivation events from 540 Ma onwards, which affected Precambrian

An assemblage of cylindrical trace fossils that occur in the Late Jurassic Missão Velha Formation is presented and interpreted to be the casts of lungfish burrows. These small-sized casts are interpreted as passive siliciclastic sedimentation into abandoned excavations made by lungfish, suggesting their presence in the Missão Velha Formation paleofauna. The identification is based on their morphological

The Madeira pluton, bearing the world-class tin-cryolite deposit of Pitinga, and the closely associated Europa pluton lie in the central part of the Amazon craton, Brazil. The Madeira pluton consists of four principal rock types: early metaluminous porphyritic amphibole-biotite granite with rapakivi texture, metaluminous biotite granite, metaluminous hypersolvus porphyritic granite, and peralkaline

Patagonia is a key place to analyze the climatic trends (waves and winds) of the Southern Hemisphere. The northern coast of the San Matías Gulf (“Bahía Sin fondo” for the original Spanish descriptions) is characterized by an attached sand barrier developed on top of former cliffs. Morphological features are indicating changes in the regional slope when the sea level drowned the depression of the gulf

Andean glaciers have been shrinking due to long-term climatic warming during the past 100 years. Stuart-Smith et al. (2021) used observations and numerical models to evaluate the anthropogenic contribution to the centennial retreat of the Palcaraju Glacier in the Peruvian Cordillera Blanca. According to their central estimate, the glacier retreat is thought to be entirely the result of the observed

In Brazil, as in many countries, inventories of mass movements usually exist for specific events and on a watershed scale and are predominantly produced from visual interpretation of aerial or orbital images, and those produced using automatic and semiautomatic methods are incipient in the national context. One of these events, the Ribeira de Iguape River Valley (Southeast Brazil), was severely affected

In the southernmost São Francisco Craton, the well-exposed Archean to Paleoproterozoic basement shows kimberlite bodies that represent the last southeastern clusters associated with the Azimuth 125° structure. The absence of Mesozoic to Cenozoic overlying cover rocks in the region allows in-depth aeromagnetic geophysical interpretation of the structural controls responsible for the emplacement of kimberlites

The long-term evolution of rivers draining westward from Brazilian Great escarpment remain unclear and one of the main questions is how western draining rivers organized and defined their modern courses. In this study, we evaluated how the Piraí Depression (PD) evolved and how rivers draining the PD interior defined their valleys and became an important contributing area for the Paraná River catchment

This paper provides a new technique for evaluating lineaments that focuses on the spatial link between surface and subsurface elements in a single layer. We chose a test area in northeast Brazil's Borborema Province. We extracted magnetic and relief lineaments from aeromagnetic and SRTM data. We defined the lineaments that agree on both layers using GIS operations. To identify the concordance between

Souza and Perez Filho (2019) inferred two transgressive events in the Late Holocene record of lower Ribeira de Iguape River and Ilha Comprida barrier, Southeastern Brazil, based on luminescence ages and paleoenvironmental interpretation of four columnar sections. In the present paper, we discuss inconsistencies on the methods applied and sample design adopted by those authors, which lead to an incorrect

Water erosion is one of the main environmental issues nowadays, which results in the decline of soil quality, reducing the productive potential of crops and also causing water pollution, decreasing water availability for human supply. Thus, this study aimed to estimate soil losses related to the rainfall seasonality in the Verdinho River basin, located in the Brazilian Cerrado. Here, we gathered remote

Opportunities to examine the structure of paleocommunities are extremely rare, due to the incompleteness of the fossil record. Regarding the Morro do Chaves Formation, there are many studies about the fauna and flora since 1870. However, paleoecological data are relatively scarce. According to the most recent study, the palynological records of the Morro do Chaves Formation were related to a disturbed

Cocos intraslab earthquakes were used to make shear-wave splitting measurements to explore the factors that control seismic anisotropy and to study the mantle wedge flow patterns in southeastern Mexico, where the Cocos plate subducts beneath the North American plate. Cocos intraslab earthquakes reach depths of 250 km, making it possible to sample the mantle wedge. The Silver and Chan (1991) covariance

We present a palaeohydrological reconstruction of Lake Chalco from 70 to 11.5 ka BP based on ostracod records consisting of three species: Limnocytherina axalapasco, Candona patzcuaro, and Cypridopsis vidua. Overall, the presence of these species helped investigate Lake Chalco water level fluctuations, and thus water salinity variations. Moreover, this work helped improve our knowledge of L. axalapasco

The city of Puerto Madryn is one of the most important on the Atlantic coast of Patagonia, Argentina, both for its number of inhabitants and its economic activity. Moreover, it presents extraordinary and distinctive coastal morphological features that preserve the paleoenvironmental history of the region. The landscape, dominated by aeolian and coastal processes, constantly faces urban sprawl, which

The Monterrey Metropolitan Area (MMA), in the State of Nuevo León, México, has had a significant increase in its population and associated urban footprint for decades. From a population standpoint, it represents the second largest urban area in México. Its growth has required increasing infrastructure for the necessary services including public access to potable water, which will continue to increase

The structure of the Central Andes forearc of northern Chile has been an enigma for many years. Along this region, the preservation of a long pediplain constituted by gravels and unconsolidated sediments has hidden the structure of the region, making it difficult to understand its tectonic evolution. The traditional and regional-scale structural models are mainly supported by outcrop-scale and local

The southern sector of the Llanos Basin in Colombia is a heavy and extra-heavy crude oil province where it has been hypothesized that hydrodynamic flow has influenced the potential of hydrocarbon storage and production. In this area, the hydrodynamic flow and the geochemical nature of the fluids are thought to decrease the potential for hydrocarbon retention. This work provides a comprehensive view

Prior investigations have suggested that there may be greater seismic hazard to Buenos Aires and Montevideo than is currently allowed for in design codes and regulations. Analyses of risk have, however, been hampered by lack of knowledge concerning potentially seismogenic faults under the Río de la Plata estuary and the adjacent area of Buenos Aires Province south of the estuary. This work uses satellite

The results of this contribution represent the first attempt regarding palynological and paleobotanical records from the municipality of Alfredo Wagner, Santa Catarina State, southern Brazil. The fossils were recovered in the top of the Siderópolis Member, upper portion of the Rio Bonito Formation, Paraná Basin. The palynological assemblage revealed a well-preserved assemblage composed of 28 spores

Cingulates (“armadillos and glyptodonts”), is a group of xenarthran mammals characterized mainly by the presence of an armor of articulated osteoderms which are usually used for systematic recognition, and which are found in most fossiliferous localities of South, Central and southern North America since the Eocene. The aim of this contribution is to describe the cingulates (“armadillos and glyptodonts”)

Abstract not available

Paleozoic and Mesozoic stratigraphic sequences in the Puerto Libertad area, NW Sonora, Mexico, are intruded by Laramide granitic plutons with dominantly alkaline affinity. We conducted a petrogenetic study of these bodies across a north-south 35 km long transect at oriented NW-SE which includes the Sierra Picú (SP), El Destierro (ED), Sierra Tordilla (ST) and Sierra Los Mochos (SLM). The intrusive

Calyptocephalella is nowadays only represented by the emblematic Chilean Helmeted Water Toad C. gayi, restricted to water bodies of Central Chile. Numerous fossil remains from latest Cretaceous to Miocene sedimentary rocks at the east of Los Andes have been attributed to this genus and several extinct Calyptocephalella species were erected. The relationships of these taxa, including the monophyly of

Abstract not available

The migration of transgressive coastal dunes over urban and farming areas is commonly observed in the semi-arid northern coast of the Brazilian northeast. However, it is unusual in the humid tropical coast of southeastern Brazil. This paper aims to investigate the aeolian dynamics and the drivers of the burial process over the Itaúnas District, Espírito Santo State landscape, by transgressive coastal

One of the major environmental and biotic turnovers of the Phanerozoic occurred at the Cretaceous-Paleogene (K-Pg) boundary, being the focus of countless scientific studies that addressed the timing, causes and consequences of this global event. Paleoenvironmental conditions that preceded the K-Pg boundary, however, have been less studied, especially at low latitudes. In order to help reconstructing

Kimberlitic rocks are known in the São Francisco Craton, Brazil, since the 1980s when the De Beers started a prospective work in the Itapicuru River Greenstone Belt. However, 40 years later, the scientific knowledge about these occurrences is still very restricted. This paper presents new geological and petrographical data for the pipes of the “Brauna Kimberlitic Field”. These rocks are exposed in

Northern Chile is a seismically very active region driven by subduction of the Nazca plate beneath the South American plate. Anomalous focal mechanisms were reported by international agencies for two recent earthquakes with magnitudes larger than Mw 6. The September 11, 2020, Mw 6.2 Loa River earthquake occurred in the forearc under the Coastal Cordillera and had a strike-slip mechanism, while most

The mega-river functions differently from ordinary rivers and its floodplain is characterized by its magnitude, morphological complexity, and evolutionary history. This study analyzes the morphological and evolutionary characteristics of the Upper Paraná mega-river floodplain (Qm 13,000 m3 s−1), characterizing it as polygenetic owing to the various formative processes involved, many of which are no

The exploitation of a geothermal field can be accompanied by both natural and induced seismicity. Hence the installation of a seismic network suitable for also locating low-magnitude earthquakes, is of great interest for geothermal development, especially for monitoring the activity related to the injection or production. Most of the aspects that affect the location of earthquakes are data quality

The Amazon rainforest is one of the most important ecosystems on the planet; however, the environmental pressure created by anthropic activities require monitoring of this critical biome. In this study, we assessed the evolution of deforestation in an open mine pit and its impact on surface environment (i.e., temperature and carbon stocks) using remote sensing techniques. The study was carried out

Inverted metamorphic gradients are recognized in several Proterozoic to Phanerozoic orogens. However, the mechanisms that are responsible for the formation of these gradients are still a matter of discussion. In the southern Brasília Orogen, an inverted metamorphic gradient is recorded in the Passos Nappe, that comprises a sequence of metasedimentary rocks with minor intercalations of tholeiitic metamafic

The Retamito Formation is located at the southernmost of Oriental Precordillera, San Juan, Argentina. This contribution defines eight facies associations: FA1 (breccias and conglomerates) linked to initial valley fills by a chaotic basal colluvium fan and/or karst collapse. FA2 (sandstones and gravelly sandstones) is interpreted as deposits of coastal shoreface systems. The FA3 (coal and coaly mudstones)

This contribution aims to describe the first palaeobotanical record of the Late Pleistocene in the Salto Ander Egg Formation (SAEF) through the analysis of phytolith assemblages. The microremains association allowed us to characterise the palaeoenvironmental conditions for these deposits and to complete the palaeobotanical record for the stratigraphic sequence of the Late Pleistocene in southwestern

The visualization, analysis and interpretation of sedimentary data can be optimized with techniques such as the Digital Outcrop Models (DOMs) generated with the Structure from Motion – Multi-View Stereo (SfM-MVS) technique. In this paper, to demonstrate the usage of DOMs in the characterization of the depositional architecture of a braided fluvial system, we developed a case study in Jaicós Formation

The March 28, 1787 (M∼8.6) earthquake on the Pacific coast, was the biggest known in Mexico. There are testimonies of damage caused by the tsunami waves at several different points along the southwest coast. Even though there have been several tsunamis known to have impacted this region, there are scarce tsunami observations. In this study, we generate a suite of 350 potential ruptures that we explore

Large-scale fluvial landforms emerge from iterative processes that sculpt Earth's surface. Tectonics, climate variability and erosion are major recurrent processes reshaping fluvial landforms ending up in self-affine patterns. In the case of the Pantanal, the largest wetland in South America, its depositional tract can be subdivided as fluvial megafans, interfans and the main trunk system. Here we

The state of Oaxaca is one of the most geologically complex and diverse in Mexico. It comprises five tectonostratigraphic terranes of contrasting nature that form a sort of tectonic collage where several magmatic pulses were developed. The different lithological assemblages of Oaxaca favored the generation of a variety of ore deposit types, some of which have been a prime source of several commodities

A palynological assemblage including the extinct araucarian dispersed pollen, Cyclusphaera scabrata, was analysed from the Achiri locality, Bolivian Altiplano. The fossil-yielding locality of Achiri is located in the Pacajes Province, La Paz Department, in the northwestern Altiplano, Bolivia. The Achiri locality is very well known by the fossil vertebrate faunas recovered from the Mauri Formation (M6)

Northern Chile is a natural laboratory to understand the relation between different basement-involved structural styles, mechanisms of basement uplift, and the interaction of Pre-Andean rift-related and Andean contractional structures. Field and geophysical data (two-dimensional seismic profiles) are key to understanding the geometry and kinematics of these structures in the subsurface. Herein, we

A study of seismic body wave attenuation was carried out for the Valle Medio del Magdalena (VMM) basin, Colombia. A total of 326 high-quality local earthquakes were used to calculate coda Q (Qc) values, and 1463 high-quality local earthquakes were used to calculate Q scattering (Qs), Q intrinsic (Qi), Q total (QT), and other attenuation parameters. The average Qc ranged from 47 for 2.0 Hz to 904 for

Alluvial fans are frequently associated with desert pavements and V horizons. In particular, the Talacasto River alluvial fan presents a spatial configuration that gives rise to different levels of deposition. The present work has the following objectives: 1: determine whether geomorphological and superficial characteristics of the landforms influence the presence, development and spatial distribution

The northern region of the intracontinental sector of the Araçuaí Orogen preserves geological records related to overlapping basins and tectonic reactivations between the Mesoarchean to the Cryogenian. The representatives are the metavolcanosedimentary sequences (i) Leandrinho (LMVS), here defined, that intercalates aluminous schists (metapelite), metagreywackes, acid metatuffs, and metalapillites