The role of the Rio Grande Rise on the continental Meso-Cenozoic alkaline magmatism in southwest Brazil

2022 ◽  
pp. 257-292
Author(s):  
Mauro C. Geraldes ◽  
Webster Ueipass Mohriak ◽  
Juliana F. Bonifácio ◽  
Letícia M.C. Cardoso ◽  
Suzana C. Moura
Keyword(s):  
Rio Grande ◽  
Alkaline Magmatism

scholarly journals Deutsche Schule urbana - Collegio Allemão de Pelotas na rota da Verein Für das Deutschtum im Ausland (V.D.A.), 1921-1925, 1933 / Urban Deutsche Schule – German College of Pelotas on the Verein Für das Deutschtum im Ausland (V.D.A.) Route, 1921-1925, 1933

2019 ◽  
Vol 2 (6) ◽  
pp. 80
Author(s):  
Maria Angela Peter da Fonseca ◽  
Elomar Antonio Callegaro Tambara
Keyword(s):  
School Culture ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
The South ◽  
Educational Project ◽  
Cultura Escolar ◽  
Didactic Material ◽  
German College

Neste artigo enfoca-se o papel dos visitantes que chegavam à Deutsche Schule urbana, Collegio Allemão de Pelotas, no sul do Rio Grande do Sul, provenientes da Verein für das Deutschtum im Ausland (V.D.A.), (Sociedade de Apoio ao Deutschtum no Exterior), em 1921, 1923, 1924, 1925 e 1933, situada em Hamburgo e Berlim, na Alemanha. O objetivo desses visitantes era inspecionar o projeto educacional alemão e a manutenção do Deutschtum, que mesclava elementos do nacionalismo alemão, vigente, à cultura escolar deste educandário em tempos de Nacionalização do Ensino no Brasil. Consequência dessas visitas era o envio de livros, material didático e professores alemães, bem como a troca de correspondência entre os alunos do educandário de Pelotas e alunos alemães. Trata-se de pesquisa qualitativa, bibliográfica e documental cujas fontes principais são os Relatórios Escolares da Deutsche Schule de Pelotas dos anos 1921, 1923, 1924, 1925 e 1933.* * *This paper focuses on the role of visitors arriving at the urban Deutsche Schule, German College of Pelotas, in the south of Rio Grande do Sul from the Verein für das Deutschtum im Ausland (VDA), a Society for Supporting Deutschtum Abroad, in 1921, 1923, 1924, 1925 and 1933, located in Hamburg and Berlin, Germany. The purpose of these visitors was to inspect the German educational project and the maintenance of the Deutschtum, which merged elements of German nationalism, in force, into the school culture of this educandário in times of Nationalization of Teaching in Brazil. The consequence of these visits was the sending of books, didactic material and German teachers, as well as the exchange of correspondence between the students of the educator of Pelotas and German students. It is a qualitative, bibliographical and documentary research whose main sources are the School Reports of the Deutsche Schule of Pelotas of years 1921, 1923, 1924, 1925 and 1933.

scholarly journals Intra-regional transportation of a tugboat fouling community between the ports of recife and natal, northeast Brazil

2010 ◽  
Vol 58 (spe3) ◽  
pp. 01-14 ◽  
Author(s):  
Cristiane Maria Rocha Farrapeira ◽  
Gledson Fabiano de Araujo Ferreira ◽  
Deusinete de Oliveira Tenório
Keyword(s):  
Rio Grande ◽  
Nonindigenous Species ◽  
Brazilian Coast ◽  
Northeast Brazil ◽  
Fouling Community

This study aimed to identify the incrusting and sedentary animals associated with the hull of a tugboat active in the ports of Pernambuco and later loaned to the port of Natal, Rio Grande do Norte. Thus, areas with dense biofouling were scraped and the species then classified in terms of their bioinvasive status for the Brazilian coast. Six were native to Brazil, two were cryptogenic and 16 nonindigenous; nine of the latter were classified as established (Musculus lateralis, Sphenia fragilis, Balanus trigonus, Biflustra savartii, Botrylloides nigrum, Didemnum psammatodes, Herdmania pallida, Microscosmus exasperatus, and Symplegma rubra) and three as invasive (Mytilopsis leucophaeta, Amphibalanus reticulatus, and Striatobalanus amaryllis). The presence of M. leucophaeata, Amphibalanus eburneus and A. reticulatus on the boat's hull propitiated their introduction onto the Natal coast. The occurrence of a great number of tunicate species in Natal reflected the port area's benthic diversity and facilitated the inclusion of two bivalves - Musculus lateralis and Sphenia fragilis - found in their siphons and in the interstices between colonies or individuals, respectively. The results show the role of biofouling on boat hulls in the introduction of nonindigenous species and that the port of Recife acts as a source of some species.

A Theologian Looks at Latin America

1958 ◽  
Vol 20 (4) ◽  
pp. 419-430
Author(s):  
Gustave Weigel
Keyword(s):  
United States ◽  
Latin America ◽  
Rio Grande ◽  
The United States ◽  
Western Hemisphere ◽  
The South ◽  
World Power ◽  
International Power ◽  
The Way

One of the constant worries of the United States, since the role of a dominant world-power has been thrust on her, is the situation of Latin America. Relations with Canada require thought and preoccupation but they produce no deep concern. Canada and the United States understand each other and they form their policies in terms of friendly adjustment. Yet the same is not true when we consider the bloc of nations stretching to the south of the Rio Grande. They form two thirds of the geographic stretch of the western hemisphere, and they constitute a population equal to ours. The dependence on Latin America on the part of the United States in her capacity as an international power is evident. What is not evident is the way to make our friendship with our southern neighbors a more stable thing than the fragile arrangement which confronts us in the present.

Timing of post–Karoo alkaline volcanism in southern Namibia

1990 ◽  
Vol 127 (5) ◽  
pp. 427-433 ◽  
Author(s):  
D. L. Reid ◽  
A. F. Cooper ◽  
D. C. Rex ◽  
R. E. Harmer
Keyword(s):  
Crustal Structure ◽  
Surface Expression ◽  
Alkaline Magmatism ◽  
Precambrian Basement ◽  
African Plate ◽  
Age Progression ◽  
Thermal Anomalies ◽  
Igneous Activity ◽  
Tectonic Boundaries

AbstractNew radiometric age data are reported for alkaline centres in southern Namibia, and are discussed together with published age data in terms of models put forward to account for post-Karoo (Mesozoic–Recent) alkaline magmatism within the African plate. Agreement between K–Ar and Rb–Sr ages indicate emplacement of the Dicker Willem carbonatite in southern Namibia at 49 ± 1 Ma. Alkaline rocks associated with the Gross Brukkaros volcano show a discordant radiometric age pattern, but the best estimate for the age of this complex is 77 ± 2 Ma, similar to that obtained for the neighbouring Gibeon carbonatite-kimberlite province. The Dicker Willem carbonatite is therefore younger than the Luderitz alkaline province (133 ± 2 Ma), and the Gross Brukkaros volcano, but is older than the Klinghardt phonolite field (29–37 Ma). The new age data argue against a distinct periodicity in alkaline igneous activity in southern Africa, thereby ruling out possible controls by episodic marginal upwarping of the subcontinent. Although the available age data do not appear to be consistent with the passage of one or even two hotspots under southern Namibia, it is argued that the surface expression of hotspots under continents may be so large and overlapping that within-plate magmatism attributed to these thermal anomalies need not necessarily be confined to narrow linear belts or show an age progression. The role of hotspots in continental alkaline magmatism is most likely one of melt generation, while local crustal structure probably controls the distribution and timing of eruption. Major tectonic boundaries in the Precambrian basement underlying southern Namibia seem to have controlled the development of Tertiary alkaline centres in that region.

scholarly journals Popular cultures and new performance contexts in contemporary Brazil the case of Folklore Festival of Olímpia

2019 ◽  
pp. 100-122
Author(s):  
Estêvão Amaro dos Reis
Keyword(s):  
Rio Grande ◽  
Sao Paulo ◽  
Ethnographic Research ◽  
São Paulo ◽  
Contemporary World

This paper reflects on the role of folklore festivals in the contemporary world. Based on ethnographic research carried out in the context of the Folklore Festival of Olímpia – FEFOL – (São Paulo/Brazil) and with Pastoril Dona Joaquina de São Gonçalo do Amarante (Rio Grande do Norte/Brazil), folklore festivals will be understood as new contexts of performance for the practices of the performative groups of Brazilian popular cultures. The reflection is based on Wenger (2012) and Turino (2008).

scholarly journals The role of viscosity in the emplacement of high-temperature acidic flows of Serra Geral Formation in Torres Syncline (Rio Grande do Sul State, Brazil)

2014 ◽  
Vol 44 (4) ◽  
pp. 669-679 ◽  
Author(s):  
Matheus Silva Simões ◽  
Lucas de Magalhães May Rossetti ◽  
Evandro Fernandes de Lima ◽  
Bruno Pinto Ribeiro
Keyword(s):  
High Temperature ◽  
Rio Grande ◽  
Rio Grande Do Sul

The volcanism of southern Italy: Role of subduction and the relationship between potassic and sodic alkaline magmatism

1989 ◽  
Vol 94 (B4) ◽  
pp. 4589-4601 ◽  
Author(s):  
R. M. Ellam ◽  
C. J. Hawkesworth ◽  
M. A. Menzies ◽  
N. W. Rogers
Keyword(s):  
Southern Italy ◽  
Alkaline Magmatism ◽  
The Relationship

scholarly journals Incidence of Rio Grande Gummosis of Grapefruit Is Not Associated with Concentrations of Anions in Soil Water

HortScience ◽  
1998 ◽  
Vol 33 (7) ◽  
pp. 1186-1187 ◽  
Author(s):  
Y.C. Li ◽  
A.K. Alva ◽  
D.V. Calvert ◽  
R.M. Sonoda ◽  
R.R. Pelosi ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Samples ◽  
Rio Grande ◽  
Sour Orange ◽  
Citrus Paradisi ◽  
High Concentrations ◽  
Depth Water ◽  
Chloride Concentrations ◽  
Suction Lysimeters

The objective of this study was to evaluate the role of chloride (Cl-) and other anions in soil water on the incidence and severity of Rio Grande Gummosis (RGG) in grapefruit (Citrus paradisi MacFadyen) trees. White `Marsh' grapefruit trees on sour orange (C. aurantium Lush.) rootstock were grown on two-row raised beds. Due to differential rates of K application (as KCl), the trees received various rates of Cl- ranging from 0 to 156 kg·ha-1 per year. Soil water was sampled using suction lysimeters at 120- and 180-cm depths. The severity of RGG was evaluated 18 months following the application of various rates of KCl. The concentration of Cl- in soil water samples varied from 16.2 to 617 mg·L-1, with mean concentrations across all treatments of 160.7 and 188.4 mg·L-1 for 120- and 180-cm depth water samples, respectively. The concentrations of Cl- and other anions (\batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{NO}_{3}^{-}\) \end{document}, \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{PO}_{4}^{3-}\) \end{document}, \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{SO}_{4}^{2-}\) \end{document}) in soil water at either 120- or 180-cm depth were poorly related to the incidence or severity of RGG (R = -0.10 to -0.28). Chloride concentrations in the soil water ranged from 20 to 617 mg·L-1 near the RGG-free trees, and from 16.7 to 310 mg·L-1 near the trees that were affected by RGG. This suggests that under the conditions of this study, neither the incidence nor the severity of RGG was influenced by high concentrations of Cl- in the soil water.

STRATIGRAPHY, AGE CONTROL, AND ROLE OF TECTONIC VS. PALEOCLIMATIC DRIVERS IN THE 6.5-4.5 MA DOWNSTREAM INTEGRATION OF THE ANCESTRAL RIO GRANDE IN SOUTH-CENTRAL N.M

2019 ◽  
Author(s):  
Daniel J. Koning ◽  
◽  
Andrew P. Jochems ◽  
Sean D. Connell ◽  
Kate E. Zeigler ◽  
...  
Keyword(s):  
Rio Grande ◽  
South Central
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