Article
Multidisciplinary Sciences
Curtis W. Baden, David L. Shuster, Felipe Aron, Julie C. Fosdick, Roland Burgmann, George E. Hilley
Summary: This study explains the process of strain increase caused by plastic deformation of the crust, combined with isostatic deflection and erosion, transforming relative fault motions into geological deformations. Through research on the Santa Cruz Mountains in the USA and comparing with predicted values, the study reveals the correlation between different records of crustal deformation.
Article
Geosciences, Multidisciplinary
E. L. Wilson, K. S. Harpp, D. M. Schwartz, R. Van Kirk
Summary: Understanding the evolution of ocean island volcanoes provides insight into mantle plumes, plume-ridge interaction, and volcanic risks. This study of the Galapagos Islands reveals the geochemical evolution of Santa Cruz Island over the past 2 million years. The analysis shows that lavas from the island have become more evolved and isotopically enriched as they moved away from the plume. The findings contribute to our understanding of the behavior of mantle plumes and the potential hazards associated with aging islands.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Microbiology
Luis Thompson, Lorena Porte, Violeta Diaz, Maria Cristina Diaz, Sebastian Solar, Pablo Valenzuela, Nicole Norley, Yumai Pires, Fernando Carreno, Sergio Valenzuela, Rukmane Shabani, Volker Rickerts, Thomas Weitzel
Summary: This case report describes a chronic meningoencephalitis with hydrocephalus caused by Cryptococcus bacillisporus (VGIII) in an immunocompetent patient in Santa Cruz, Bolivia. It is the first report of a member of the Cryptococcus gattii species complex from Bolivia, indicating the presence of C. bacillisporus (VGIII) in this tropical region and enhancing our understanding of epidemiology and clinical aspects of these emerging fungal pathogens in South America.
Article
Geosciences, Multidisciplinary
I. Nyoman Candra, Martin H. Gerzabek, Franz Ottner, Karin Wriessnig, Johannes Tintner, Greta Schmidt, Nicola Rampazzo, Franz Zehetner
Summary: Climate and parent material type are important factors in soil formation. The study found that regardless of parent material type, pH and effective cation exchange capacity (CECeff) decreased, while potential cation exchange capacity (CECpot), phosphate retention, and certain mineral elements increased with increasing elevation. The topsoil bulk density (BD) and organic carbon (OC) content did not show a clear altitudinal pattern on lava, but decreased (BD) or increased (OC) on scoria with increasing elevation. Clay mineralogy changed with elevation, and short-range-order (SRO) minerals dominated at high elevation. Climate was found to be the overriding factor in controlling mineralogical and pedogenic changes, with scoria parent materials accelerating weathering compared to lava.
Article
Environmental Studies
Ilia Alomia Herrera, Rose Paque, Michiel Maertens, Veerle Vanacker
Summary: Islands, with their limited size and remote locations, are highly vulnerable to land cover change. This study examines vegetation cover change in the agricultural area of Santa Cruz in the Galapagos Archipelago from 1961 to 2018. The conversion of native forests and grasslands into agricultural land is the main land cover change observed. The expansion of agriculture occurred primarily in the 1960s and 1970s, and newer farms are smaller and settled in less favorable areas.
Article
Ecology
Carlos Augusto Franca Schettini, Lucimary A. Silva, Lucia Maria Mafra Valenca, Valdir A. Vaz Manso
Summary: The study assessed the hydrodynamics of the Santa Cruz Channel in Brazil's Northeast region, finding that tides are the main driver of transport processes and that salinity and turbidity display stratification within the tidal cycle.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Florias Mees, Georges Stoops, Bruno Delvaux, Florian Buyse, Sylvia Lycke, Peter Vandenabeele, Eric Van Ranst
Summary: Abundant bayerite, a rare Al(OH)3 polymorph, was found in the lower part of a shallow profile on volcanic ash from Isla Santa Cruz of the Galápagos archipelago. The bayerite is present as thin coatings along the sides of pores, including planar voids and narrow channels, and is associated with gibbsite. The formation of bayerite is believed to be a result of rapid crystallization from Al-rich solutions, while gibbsite is considered to be a product of ongoing bayerite transformation.
Article
Geosciences, Multidisciplinary
Richard F. Kay, Sergio F. Vizcaino, M. Susana Bargo, Jackson P. Spradley, Jose Cuitino
Summary: The study on the Santa Cruz Formation in Austral Patagonia reveals that the faunal structure and environmental conditions remained relatively consistent across different temporal intervals, suggesting a degree of consistency with geographical locations. Estimates of precipitation and temperature at localities were similar to those of existing lowland mammalian sites in South America, indicating a certain level of adaptability in ancient ecosystems.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Linguistics
Pranav Anand, Daniel Hardt, James Mccloskey
Summary: This report introduces a new research resource, a searchable database of 4,700 naturally occurring instances of sluicing in English, annotated to shed light on ellipsis research questions. It describes the construction and organization of the dataset, as well as some initial empirical findings focusing on antecedents and mismatches between antecedents and ellipsis sites.
Article
Geology
Ezequiel I. Vera, Valeria S. Perez Loinaze, Damian Moyano-Paz, Marina D. Coronel, Makoto Manabe, Takanobu Tsuihiji, Fernando E. Novas
Summary: Few latest Cretaceous fossil floras have been discovered in South America, particularly in the Austral-Magallanes Basin. This study describes the diverse fossil elements found in the Chorrillo Formation, including water lily remains, leaf impressions, and palynological samples. The findings reveal the presence of a diverse community in low energy freshwater environments during the Late Cretaceous.
CRETACEOUS RESEARCH
(2022)
Article
Astronomy & Astrophysics
Austen Gabrielpillai, Rachel S. Somerville, Shy Genel, Vicente Rodriguez-Gomez, Viraj Pandya, L. Y. Aaron Yung, Lars Hernquist
Summary: This study applies the Santa Cruz semi-analytic model to merger trees extracted from a dark matter only version of the IllustrisTNG simulations and compares the results with TNG. The comparison shows good agreement in certain central galaxy properties but significant differences in others. Additionally, the analysis reveals similar correlations between residuals in the SMHM relation in the SAM and TNG.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Biodiversity Conservation
Mariana Villegas, Catherine Soos, Gustavo Jimenez-Uzcategui, Shukri Matan, Keith A. Hobson
Summary: The study found that insectivorous and granivorous finches on Santa Cruz Island have higher δ C-13 values, while herbivorous finches have lower values. Segregation among dietary guilds was enhanced by differences in δ H-2 values, providing better trophic discrimination.
Article
Geology
Thomas Martin, Francisco J. Goin, Julia A. Schultz, Javier N. Gelfo
Summary: This paper reports on the discovery of rare Cretaceous animal teeth fragments in Santa Cruz province, Argentina, revealing new records of docodontans, Cretaceous australosphenidans, and stem dryolestids in South America. These fossils may provide important clues for understanding faunal interrelationships between Australia and South America during the late Early/early Late Cretaceous.
CRETACEOUS RESEARCH
(2022)
Article
Geology
Cosme F. Rombola, Carlos D. Greppi, Roberto R. Pujana, Juan L. Garcia Massini, Eduardo S. Bellosi, Sergio A. Marenssi
Summary: This study describes two silicified fossil woods from the Cerro Fortaleza Formation in Santa Cruz Province, Argentina, identifying them as a new species of the fossil genus Brachyoxylon. The anatomical characteristics of these specimens indicate distinct growth ring boundaries, absence of axial parenchyma, uniseriate rays, and other features typical of this genus. This record contributes fresh evidence to the prevalence and widespread distribution of Cheirolepidiaceae in the Cretaceous of Patagonia.
CRETACEOUS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Ariana Paulina-Carabajal, Francisco T. Barrios, Ariel H. Mendez, Ignacio A. Cerda, Yuong-Nam Lee
Summary: Recent discoveries in southern South America have improved the Late Cretaceous dinosaur record, with findings from Chorrillo and Cerro Fortaleza formations adding ankylosaur remains to the previously recorded dinosaur fauna. A site in Cerro Fortaleza Formation yielded isolated teeth and osteoderms from Abelisauridae, Titanosauria, Nodosauridae, and Peirosauridae, providing valuable information on the biodiversity of the region during the Campanian-Maastrichtian age. This site also marks the first record of ankylosaurs and the most southerly record of Peirosauridae in South America.