... this objective, we interpreted selected 2D and 3D seismic and well data located in two areas known as the Varela Low (VL) and Fazenda Guindaste Low (FGL). We identified diverse deformation styles in those two basin depocenters. Our interpretation indicates that VL consists of a half-graben with a significant...

... associations were recognized: complex ribbons, small-scale simple ribbons, small-scale bars, lobes, fine-grained beds, and heterolithic beds with continental fossils. They are part of a low-sinuosity meandering (LSM) fluvial system with aggradation ( Varela 2011 ). Petrographic and X-ray analyses of each...

...: it is consistent with a U–Pb titanite age of 360 Ma reported by Varela et al. (2005) for a metadiorite at this locality. Three low Th/U zircon areas give an older age of 376 ± 5 Ma. Sample FO1711, from near the snout of Glaciar Yelcho, Chile, is a banded gneiss composed of alternating irregular biotite...

... be attributed to late Devonian tectonometamorphic events recorded in adjacent areas ( Fig. 7a ; Franzese 1995 ; Lucassen et al. 2004 ; Varela et al. 2005 ; Rapela et al. 2021 ). This correlation is further supported by low-pressure, medium-grade conditions estimated for the Cuesta de Rahue Metamorphic...

...) . Basement localities from Cingolani & Varela (1973) : 1, La Mascota rhyolite; 2, La Ermita rhyolite; 3, Agua Blanca granite; 4, Cerro Pan de Azúcar–Cerro del Corral area; 5, San Mario granite; 6, Cerro Colorado granite. The schematic ENE–WSW cross-section (A–A′) shows the main cleavage (S 1...

...Enru Liu; Mark Chapman; Isabel Varela; Xiangyang Li; John H. Queen; Heloise Lynn Abstract Recent observations from several walkaround, walkaway, and 3D VSPs from various parts of the world have shown that anisotropy symmetry directions (or fracture orientations) estimated from traveltime...

...Dante Navarrete-Macias, M. EERI; Jorge Varela-Rivera, M. EERI; Luis Fernandez-Baqueiro, M. EERI This paper presents the results of a study on the out-of-plane seismic behavior of confined masonry walls. Five confined walls were tested under reverse cyclic loads. The variables studied were the axial...

...N.C. Martinez; R.W. Murray; R.C. Thunell; L.C. Peterson; F. Muller-Karger; L. Lorenzoni; Y. Astor; R. Varela Abstract We have analyzed the chemical compositions of 87 samples from the Cariaco Basin and 20 samples from the Orinoco Delta, Venezuela, in order to better characterize the fluvial sources...

...S.-L. Hwang; P. Shen; H.-T. Chu; T.-F. Yui; M.-E. Varela; Y. Iizuka Abstract Kuratite, ideally Ca 4 (F Ti 2 )O 4 [Si 8 Al 4 O 36 ], the Fe 2+ -analogue of rhönite and a new member of the sapphirine supergroup, was identified from the D'Orbigny angrite meteorite by electron microscopy and micro...

... of the Argentine Precordillera as a Laurentian rifted drifted, and collided terrane: A geodynamic model Geological Society of America Bulletin 1995 148 253 273 Dalla Salda L.H. Cingolani C.A. Varela R. Early Paleozoic orogenic belt of the Andes in South America: Result of Laurentia...

... inclusion rehomogenization (very low Al 2 O 3 and high FeO at 3.5–4.0 wt% MgO). This finding suggests that no significant fractionation affected the magma after melt inclusion entrapment. Stockstill et al. (2005) and Varela et al. (2001) both utilized heating stages to rehomogenize melt inclusions...

...Jorge Varela-Rivera, M. EERI; Luis Fernandez-Baqueiro, M. EERI; Jose Gamboa-Villegas, M. EERI; Adda Prieto-Coyoc, M. EERI; Joel Moreno-Herrera, M. EERI Results of a study on the flexural behavior of confined masonry walls are presented. Six walls were tested in a laboratory under reverse cyclic...

... are not a panacea and indeed are subject to a variety of challenges akin to those encountered in ecological niche modeling more broadly (e.g., Guisan and Thuiller 2005 ; Elith and Leathwick 2009 ; Saupe et al. 2012). For example, limited fossil occurrences may exacerbate the issue of low sample size in paleoENMs...

... of the North Patagonian Massif consists of the Cushamen Metamorphic Complex and the Mamil Choique granitoids. The first reliable U-Pb ages from these rocks were in the range of 286–272 Ma ( Varela et al., 2005 ). A muscovite migmatite, located west of Mamil Choique, is 281 ± 2 Ma (U-Pb sensitive high...

... -compensation filter based on the method proposed by Varela et al. (1993) . Generally, an inverse Q -filter is unstable for high-frequency noise. To stabilize the process, before attenuation compensation was performed, the data were processed by low-pass frequency filtering to attenuate the frequency content...

... and unnamed low-angle structure ( Fig. 2 ) that was mapped on the basis of satellite imagery and previously published maps ( Varela et al., 2011 ). In this region, the Taco Complex contains variably deformed Sil-Grt-Bt ± Ms ± Kfs schist and gneiss ( Fig. 4A ) (mineral abbreviations after Whitney and Evans...

.... Geological map of the study area in Santa Cruz province. The cross-sections A–A′ and B–B′ analysed in this work are represented by black lines. Source: based on field data and Kraemer et al. (2002) , Nullo et al. (2006) , Cobos et al. (2009) , Varela et al. (2012) , Giacosa et al. (2012...

...Carlos Lopo Varela; Andre L. R. Rosa; Tadeusz J. Ulrych Abstract At the present time, proper solutions for absorption modeling are based on wavefield extrapolation techniques which, in some instances, may be considered expensive. Two alternative, low cost, but incomplete solutions exist...

... ). González et al. ( 2020 ) proposed that the Huincul Fault Zone would have tectonically juxtaposed two metamorphic belts during the Early Palaeozoic by dextral strike-slip motion of an outboard low- P / high- T belt (northern Patagonia terrane), and a parallel inboard medium- P / T belt of Barrovian...

... of South America (e.g. Varela et al. 1991 ; Dalla Salda et al. 1992 ). Rapela & Pankhurst (2002) and Pankhurst et al. (2003) supported the idea that the Early Palaeozoic Pampean and Famatinian magmatic belts of the Sierras Pampeanas might be traced continuously into the basement...