Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

El artículo tiene como propósito reflexionar sobre la posición de la literatura brasileña contemporánea en el panorama latinoamericano actual. A partir de la noción de la república mundial de las letras de Pascale Casanova, se pretende arrojar luz sobre las razones por las que la literatura brasileña tiene poca presencia dentro de la escena literaria latinoamericana. Pese a que las letras brasileñas contemporáneas han llamado la atención por una serie de acontecimientos sociopolíticos colaterales, como la Copa del Mundo en el 2014, el apoyo a la traducción de la Biblioteca Nacional o el hecho de que Brasil fuera el país invitado a la Feria Internacional de Frankfurt en 2013, todavía la literatura brasileña no se percibe como parte del conjunto latinoamericano, lo que no ha permitido un intercambio activo entre Brasil y los países de América Latina de habla hispana.

El artículo analiza algunas implicaciones que se evidencian en contextos de aislamiento o posibilidad de contagio colectivo. Para ello, utiliza como corpus las obras literarias latinoamericanas La Tierra en pandemia (2020), del brasileño Aleilton Fonseca; Mugre Rosa (2022), de la uruguaya Fernanda Trías, y El amor en los tiempos del cólera (1985), del colombiano Gabriel García Márquez. Interesa, sobre todo, analizar la administración política de la vida humana y las estrategias de supervivencia colectiva que aparecen en estas obras.

La aparición de una antología del ensayo breve en el Ecuador resulta de una relevancia fundamental en el panorama literario contemporáneo. En un país cuya tradición ensayística ha quedado muchas veces eclipsada por la narrativa y la poesía, la compilación de este tipo de trabajos invita a una reflexión urgente y profunda sobre la realidad nacional, el pensamiento crítico y los modos en que los intelectuales ecuatorianos se han vinculado a su tiempo y espacio...

Las relaciones literarias entre Brasil y la Comunidad Andina empiezan un nuevo período tras el inicio, en 2022, del Programa Leitorados Guimarães Rosa, del Instituto Guimarães Rosa de la Embajada de Brasil en Quito, programa que mantiene la Cátedra Brasil-Comunidad Andina, que tiene su sede en la Universidad Andina Simón Bolívar. Desde la fecha mencionada, se han ofrecido cursos de literatura y cultura brasileña, ampliando los proyectos ya existentes en la institución dedicados a los vínculos con Ecuador. Ha sido una grata oportunidad poder compartir textos literarios y no literarios con participantes de distintas nacionalidades. Hasta la presente fecha, escritores, profesores universitarios y estudiantes de pregrado y posgrado de Argentina, Brasil, Colombia, Ecuador y México han asistido a dichas actividades.

Del cero al diez, ¿cuánto le duele?... Entre esas dos cifras, entre entregarse a la tragedia o al cinismo, cualquier número cabe, siempre y cuando se sustente en una historia verosímil. Todo dolor exige un buen relato. (13)Así comienza la obra. Con ese dejo de ironía tan propio de la escritura de Carolina Andrade. Pero también se anuncia la motivación que llevará al personaje narrador a contar su historia.

The Golfo San Jorge Basin (GSJB) preserves the thickest Cenozoic stratigraphic record in extra-Andean Patagonia (Argentina), reaching approximately 1500 meters. This record was subdivided into three major second-order transgressive regressive (TST-RST) sedimentary sequences: (1) The early Paleogene T-R cycle (~ 600 m thick; early Paleocene–late Eocene), comprising the Salamanca Formation (marine), Río Chico Group (fluvial), and part of Sarmiento Formation (pyroclastic loess). This sequence reflects a marine-to-continental transition, with an early marine stage marked by tidally-influenced, shallow-marine and inner-shelf sedimentation, followed by fluvial systems and long-lived accumulation and reworking of fine ash in a low-gradient continental setting. (2) The late Paleogene-early Neogene T-R cycle (~ 200 m thick, late Eocene-earlyMiocene), composed of the El Huemul Formation (marine) and the upper part of Sarmiento Formation (pyroclastic deposits). (3) The Neogene T-R cycle (~ 700 m thick; early–middle Miocene), includes the Chenque Formation (marine) and the Santa Cruz or Escalante Formation (fluvial-eolian). The three marine second order TSTs share similar temporal duration (<5 million years) and sedimentation patterns are strongly influenced by continental slope inheritance. However, the continental second-order RSTs differ significantly: (i) the early Paleogene RST lasted ~ 22 million years, compared with the ~ 10 million years of the late Paleogene-early Neogene cycle and the ~ 5 million years of the Neogene; (ii) the Paleogene records extensive global climatic fluctuations, whereas the Neogene is characterized by a single wet to dry cycle; (iii) pyroclastic deposits dominate the early Paleogene and late Paleogene-early Neogene sequences, but they are nearly absent in the Neogene; (iv) the first two second order continental cycles preserves an exceptional assemblage of continental mammal faunas, serving as a biostratigraphic reference for South America. Although the GSJB’s macrostratigraphy correlates strongly with regional sea-level fluctuations, additional controlling factors have been proposed, including extensional tectonic reactivations, Andean orogenic uplift, intrusion-related tectonic loading, sustained pyroclastic input, climatic variability, and dynamic topography.

This study presents a synthesis of petrographic analyses of the cretaceous Pozo D-129, Matasiete, Castillo, and Bajo Barreal formations in the Golfo San Jorge Basin, highlighting the influence of volcanic activity and sediment supply on the evolution of the Chubut Group. Data from outcrops in the San Bernardo Fold Belt and from the subsurface indicate that sandstone compositional variability was controlled by shifts in sediment source areas, linked to regional tectonic processes and active volcanism. Sandstones exhibit feldspatho-lithic and litho-feldspathic qFL, fQL, IQF to qLF composition detrital modes, with spatial and temporal variations in volcanic, pyroclastic lithic, feldspar and quartz components. The sediment sources for the outcrops in the San Bernardo Fold Belt include the Paleozoic igneous-metamorphic basement, Middle-Upper Jurassic volcanic and volcaniclastic rocks (Lonco Trapial Group), and acidic and pyroclastic sequences assigned to the Marifil Group. In contrast, the South Flank records a broader range of petrofacies, reflecting a combination of distal and local sources. In addition to the provenance of the Andes Cordillera, this sector received sediment contributions from Jurassic rocks exposed in the Deseado Region and older crystalline basement units. Andean volcanism dominates across all units, contributing direct volcanic ash fallout and reworked pyroclastic material.

Hothouse periods, such as the mid-Cretaceous and early Eocene, were times of global warming with high levels of greenhouse gases, elevated temperatures, and ice-free poles that provide a case study for understanding past climate dynamics. This study examines the paleo-Ultisols from the Bajo Barreal Formation (BBF; Cenomanian) and the Las Flores Formation (LFF; early Eocene) in central Patagonia (southern region of the Golfo San Jorge Basin). Due to their prolonged soil formation, these well-developed paleosols serve as valuable climate indicators. These paleosols were analyzed using a multi-proxy approach to understand their significance during those two periods in the Southern Hemisphere. The BBF Ultisols (mid-Cretaceous, ~51° paleo-S) display kaolinite-rich Bt horizons, formed under intense chemical weathering conditions and leaching processes, linked to a temperate and humid climate. On the other side, the LFF Ultisols (early Eocene, ~52° paleo-S) with kaolinite-dominated Bt and/or Btv horizons reflect their formation under higher chemical weathering and leaching processes, under a temperate-tropical and humid climate. For the times of formation of both BBF and LFF paleo-Ultisols, both localities were within the Warm Temperate climate zone. In contrast, this zone currently extends to approximately 40° N and S latitude. Present-day Patagonia is in the Arid climate zone, with much drier and cooler climate that contrasts with the warmer, wetter conditions of the Cenomanian and early Eocene localities analyzed. These findings highlight significant latitudinal displacement of climate zones during hothouse periods, emphasizing their importance in understanding past climate dynamics and providing insights into future climate change scenarios.

The Río Mayer Formation (Lower Cretaceous) of the Austral Basin, Patagonia, is a key source rock for unconventional reservoirs. This study explores the potential of machine learning (ML) for predicting Total Organic Carbon (TOC) content using outcrop data, a novel approach compared to traditional subsurface data applications. Employing dimensional reduction techniques (PCA, T-SNE, UMAP), the analysis revealed clear clustering of high TOC values in feature space, supporting the feasibility of predictive modeling. Three ML models —Logistic Regression, Support Vector Classifier (SVC), and KNearest Neighbors (KNN)— were tested using a feature set derived from ANOVA F-Score rankings. Dimensionality reduction improved model performance, with SVC achieving the most robust results. Despite limited labeled samples, predictions across models were consistent, identifying a promising region for high TOC. The study highlights the importance of integrating geological variables and XRD data in TOC modeling and emphasizes the need for expanded datasets and additional sedimentary sections to enhance regional interpretations.

The Golfo San Jorge Basin evolved through a complex multiphase structural history from the Middle Jurassic to the Neogene. Its stratigraphic record captures key tectonic events in central extra-Andean Patagonia during Gondwana fragmentation and the Andes construction, allowing us to refine and calibrate multiscale structural processes associated with extension and positive tectonic inversion. The structural architecture reflects the interplay of upper-crustal remote stress, active basement structures, coaxial and non-coaxial extensional reactivations, short-wavelength tectonic inversion, thermal subsidence, and mantle processes. A comprehensive understanding of these interactions is crucial for improving regional basin models with broader implications for tectonic and petroleum system studies.