P-T-t path reconstruction in a syn-deformational migmatization event along the north-central portion of Sierra de Comechingones, Córdoba, Argentina

Author(s):  
Matías G. Barzola ◽  
Alina M. Tibaldi ◽  
Juan E. Otamendi ◽  
Eber A. Cristofolini ◽  
Joshua J. Schwartz ◽  
...  
2020 ◽  
Vol 30 (1) ◽  
pp. 100-114
Author(s):  
Nazaré Barbosa ◽  
Hilberto Soares ◽  
Lorena Feitosa

The Cachoeira da Ilha Formation (FCI) is located in the north central portion of the Amazonian Craton, northeast of Roraima. It is found by ignimbritic rocks with about 1990 Ma. Acid pyroclastic rocks in the region of the municipality of Amajari were classified as ignimbrites: solid, moderately welded and rheomorphic from variations in the degree in the welding process, proportion and type of pyroclasts and textural aspects. The crystalloclasts are made of quartz, sanidine and plagioclase and are dispersed in a glass-matrix. They are usually found with corrosion, dentate and intensely sericitized and/or saussuritized gulfs, showing low temperature hydrothermal alteration. It is also possible to distinguish mafic, microporphyritic and cognate lithitic fragments.


2016 ◽  
Vol 19 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Juliana Guzmán-González ◽  
Enelise Katia Piovesan ◽  
Gelson Luis Fambrini ◽  
Édison Vicente Oliveira

Zootaxa ◽  
2018 ◽  
Vol 4379 (3) ◽  
pp. 445 ◽  
Author(s):  
SHEILA PEREIRA DE ANDRADE ◽  
CEZAR FILHO ROCHA ◽  
WILIAN VAZ-SILVA

Proceratophrys Miranda-Ribeiro, 1920 currently comprises 40 species (Frost 2017) of which 15 are allocated into the Proceratophrys cristiceps species group (sensu Brandão et al. 2013). The species in this group are characterized by the absence of postocular swellings and, except for P. concavitympanum, are found in seasonally open habitats in Brazilian Cerrado and Caatinga morphoclimatic domains (Giaretta et al. 2000; Ávila et al. 2012; Teixeira Jr. et al. 2012; Brandão et al. 2013). Information on advertisement calls is available for 11 species of the group (Eterovick & Sazima 1998; Nunes & Juncá 2006; Brasileiro et al. 2008; Santana et al. 2010; Ávila et al. 2012; Martins & Giaretta 2011; 2012; 2013; Ferreira et al. 2016). Proceratophrys branti Brandão, Carmaschi, Vaz-Silva & Campos, 2013 has been recently described and allocated in the P. cristiceps species group. The species occurs in open areas in the north-central portion of the Brazilian Cerrado, in the states of Goiás, Minas Gerais and Tocantins (Brandão et al. 2013). Herein we describe for the first time its advertisement call, based on recordings made in an area of Cerrado biome in the state of Tocantins. 


Koedoe ◽  
1975 ◽  
Vol 18 (1) ◽  
Author(s):  
I.L. Rautenbach ◽  
J.A.J. Nel

An earlier paper (Rautenbach 1971) summarized documented distributional data on the smaller mammals in the Kalahari Gemsbok National Park, Republic of South Africa. Since then continued field- work in this Park (e.g. Nel and Rautenbach in press) has yielded more information on the distribution of some previously recorded species,whilst other species have been recorded for the first time. Collecting hasbeen concentrated on two localities in the vicinity of Twee Rivieren, two near Nossob Camp, as well as at Dankbaar in the north-central portion of the Park.


2013 ◽  
Vol 20 (3) ◽  
pp. 57 ◽  
Author(s):  
Alexandre Guida Navarro

Este artigo apresenta os resultados iniciais acerca do projeto de pesquisa “O Povo das Águas: carta arqueológica das estearias da porção centro-norte da Baixada Maranhense”. Tais resultados referem-se ao levantamento bibliográfico acerca do tema que nos ocupa, levantamento de alguns sítios arqueológicospara escavação e alguns questionamentos acerca do processo de ocupação pré-histórica na área de estudo.Palavras-chave: Arqueologia. Pré-história maranhense. Estearias. Padrão de assentamento. THE PEOPLE OF THE WATERS:dwellings archaeological chart of the north-central portion of Maranhão’s baixadaAbstract: This article presents the initial results of a research project on "The People of the Waters: ArchaeologicalProject about Dwellings on the North Central Portion at Baixada Maranhense." These results relate to the literature on the subject that we are studying, lifting some archaeological sites for excavation and questions about the process of prehistoric occupation in the study area.Keyword: Archaeology. Prehistory of Maranhão. Dwellings. Settlement Pattern. LOS HABITANTES DE LAS AGUAS:carta arqueológica de los palafitos de la parte norte-central de baixada maranhenseResumen: Este artículo presenta los resultados iniciales acerca del proyecto de investigación “El Pueblo de las Águas: carta arqueológica de los palafitos de la porción centro norte de la Baixada Maranhense”. Estos resultados dicen respecto al levantamento bibliográfico para excavaciones y cuestionamientos acerca del proceso de ocupación en el área de estudio.Palabras clave: Arqueología. Pre-historia de Maranhão. Palafitos. Patrón de asentamiento.


Sign in / Sign up

Export Citation Format

Share Document