scholarly journals Style and history of Andean deformation, Puna plateau, northwestern Argentina

Tectonics ◽  
2001 ◽  
Vol 20 (2) ◽  
pp. 210-234 ◽  
Author(s):  
Isabelle Coutand ◽  
Peter R. Cobbold ◽  
Marc de Urreiztieta ◽  
Pierre Gautier ◽  
Annick Chauvin ◽  
...  
Keyword(s):  
Northwestern Argentina ◽  
Puna Plateau ◽  
History Of

Deformation history of the Puna plateau, Central Andes of northwestern Argentina

2020 ◽  
Vol 140 ◽  
pp. 104133
Author(s):  
Susana Henríquez ◽  
Peter G. DeCelles ◽  
Bárbara Carrapa ◽  
Amanda N. Hughes ◽  
George H. Davis ◽  
...  
Keyword(s):  
Central Andes ◽  
Deformation History ◽  
Northwestern Argentina ◽  
Puna Plateau ◽  
History Of ◽  
Plateau Central

Corrigendum to “Deformation history of the Puna plateau, Central Andes of northwestern Argentina” [J. Struct. Geol. 140 (2020) 104133]

2021 ◽  
pp. 104245
Author(s):  
Susana Henríquez ◽  
Peter G. DeCelles ◽  
Bárbara Carrapa ◽  
Amanda N. Hughes ◽  
George H. Davis ◽  
...  
Keyword(s):  
Central Andes ◽  
Deformation History ◽  
Northwestern Argentina ◽  
Puna Plateau ◽  
History Of ◽  
Plateau Central ◽  
Struct Geol

scholarly journals Phylogeography of two Andean frogs: Test of vicariance versus elevational gradient models of diversification

2019 ◽  
Author(s):  
Daria Koscinski ◽  
Paul Handford ◽  
Pablo L. Tubaro ◽  
Peiwen Li ◽  
Stephen C. Lougheed
Keyword(s):  
Sequence Data ◽  
Environmental Gradients ◽  
Spatial Scales ◽  
Elevational Gradient ◽  
Northwestern Argentina ◽  
Dna Sequence Data ◽  
The Andes ◽  
Common Causes ◽  
History Of ◽  
Historical Range

ABSTRACTThe tropical and subtropical Andes have among the highest levels of biodiversity in the world. Understanding the forces that underlie speciation and diversification in the Andes is a major focus of research. Here we tested two hypotheses of species origins in the Andes: 1. Vicariance mediated by orogenesis or shifting habitat distribution. 2. Parapatric diversification along elevational environmental gradients. We also sought insights on the factors that impacted the phylogeography of co-distributed taxa, and the influences of divergent species ecology on population genetic structure. We used phylogeographic and coalescent analyses of nuclear and mitochondrial DNA sequence data to compare genetic diversity and evolutionary history of two frog species: Pleurodema borellii (Family: Leiuperidae, 130 individuals; 20 sites), and Hypsiboas riojanus (Family: Hyllidae, 258 individuals; 23 sites) across their shared range in northwestern Argentina. The two showed concordant phylogeographic structuring, and our analyses support the vicariance model over the elevational gradient model. However, Pleurodema borellii exhibited markedly deeper temporal divergence (≥4 Ma) than H. riojanus (1-2 Ma). The three main mtDNA lineages of P. borellii were nearly allopatric and diverged between 4-10 Ma. At similar spatial scales, differentiation was less in the putatively more habitat-specialized H. riojanus than in the more generalist P. borellii. Similar allopatric distributions of major lineages for both species implies common causes of historical range fragmentation and vicariance. However, different divergence times among clades presumably reflect different demographic histories, permeability of different historical barriers at different times, and/or difference in life history attributes and sensitivities to historical environmental change. Our research enriches our understanding of the phylogeography of the Andes in northwestern Argentina.

Vertical axis rotations across the Puna plateau (northwestern Argentina) from paleomagnetic analysis of Cretaceous and Cenozoic rocks

1999 ◽  
Vol 104 (B10) ◽  
pp. 22965-22984 ◽  
Author(s):  
Isabelle Coutand ◽  
Annick Chauvin ◽  
Peter Robert Cobbold ◽  
Pierre Gautier ◽  
Pierrick Roperch
Keyword(s):  
Vertical Axis ◽  
Northwestern Argentina ◽  
Puna Plateau

Melting the roof of a chamber containing a hot, turbulently convecting fluid

1988 ◽  
Vol 188 ◽  
pp. 107-131 ◽  
Author(s):  
Herbert E. Huppert ◽  
R. Stephen J. Sparks
Keyword(s):  
Salt Solution ◽  
Thermal History ◽  
Convective Motion ◽  
Basaltic Rock ◽  
Aqueous Salt Solution ◽  
Volcanic System ◽  
Northwestern Argentina ◽  
History Of ◽  
Basaltic Layer ◽  
Surrounding Fluid

The input of a hot, turbulently convecting fluid to fill a chamber can result in the roof of the chamber melting. The rate of melting of the roof is here analysed experimentally and theoretically. Three separate cases are considered. The melt may be heavier than the fluid and initially sink through it. The intense motion in the fluid then mixes the falling melt in with it. Alternatively, the melt may be less dense than the fluid and form a separate layer between the roof and the fluid. This melt layer can itself be in quite vigorous convective motion. An intermediate case is shown to be possible, wherein the melt is initially denser than the fluid, and sinks. As its temperature increases and its density decreases, it becomes less dense than the surrounding fluid and rises. Experimental simulations of each of these three cases are described. The experiments employ a roof of either wax or ice which is melted by the aqueous salt solution beneath it. The second case, that of a light melt, has important geological applications. It describes the melting of the continental crust by the emplacement of a hot, relatively dense input of fluid basaltic rock. Both the basaltic layer and the resultant granitic melt layer crystallize and increase their viscosities as they cool. These effects are incorporated into the analysis and the rate of melting and the temperatures of the two layers are calculated as functions of time. The process is exemplified by the formation of the Cerro Galan volcanic system in Northwestern Argentina over the last 5 million years. An Appendix analyses the thermal history of the fluid in a chamber that does not melt and compares the results obtained with those derived previously.

Neotectonic deformation of the southern Puna Plateau, northwestern Argentina

1989 ◽  
Vol 2 (2) ◽  
pp. 111-130 ◽  
Author(s):  
R.W. Allmendinger ◽  
M. Strecker ◽  
J.E. Eremchuk ◽  
P. Francis
Keyword(s):  
Northwestern Argentina ◽  
Neotectonic Deformation ◽  
Puna Plateau

scholarly journals New data on the distribution and natural history of the lesser grison (Galictis cuja), hog-nosed skunk (Conepatus chinga), and culpeo (Lycalopex culpaeus) in northwestern Argentina

Mammalia ◽  
2014 ◽  
Vol 78 (2) ◽  
Author(s):  
Cintia G. Tellaeche ◽  
Juan I. Reppucci ◽  
Estela M. Luengos Vidal ◽  
Mauro Lucherini
Keyword(s):  
Natural History ◽  
Northwestern Argentina ◽  
History Of ◽  
New Distribution

AbstractWe present a total of 190 new distribution records of three little-known mammalian carnivores (

Cenozoic dextral transpression and basin development at the southern edge of the Puna Plateau, northwestern Argentina

1996 ◽  
Vol 254 (1-2) ◽  
pp. 17-39 ◽  
Author(s):  
M. de Urreiztieta ◽  
D. Gapais ◽  
C. Le Corre ◽  
P.R. Cobbold ◽  
E. Rossello
Keyword(s):  
Northwestern Argentina ◽  
Basin Development ◽  
Puna Plateau

The strophomenide brachiopod Ahtiella Öpik in the Ordovician of Gondwana and the early history of the plectambonitoids

2018 ◽  
Vol 92 (5) ◽  
pp. 768-793 ◽  
Author(s):  
Juan L. Benedetto
Keyword(s):  
New Species ◽  
Fossil Record ◽  
Species Level ◽  
Early History ◽  
Northwestern Argentina ◽  
Higher Taxa ◽  
History Of ◽  
Volcaniclastic Rocks ◽  
Short Time ◽  
Volcaniclastic Succession

AbstractThe Precordilleran species Ahtiella argentina Benedetto and Herrera, 1986 is redescribed and illustrated and Monorthis coloradoensis Benedetto, 1998b from northwestern Argentina is reassigned to the genus Ahtiella Öpik, 1932. Ahtiella famatiniana new species from volcaniclastic rocks of the Famatina range (western Argentina) and Ahtiella tunaensis new species from the Precordillera basin (Cuyania terrane) are proposed. Paleogeographic and stratigraphic evidence strongly suggests that Ahtiella originated in the Andean region of Gondwana to further migrate to Avalonia, Baltica, and Cuyania. Contrary to previous assumptions, the fossil record from the Famatina volcaniclastic succession suggests that the plectambonitoid Ahtiella famatiniana n. sp. evolved from the hesperonomiid orthoid Monorthis transversa Benedetto, 2003 that always occurs in the underlying strata. Phylogenetic analysis of Ahtiella species shows that A. famatiniana n. sp. and the Peruvian A. zarelae Villas in Gutiérrez-Marco and Villas, 2007 are not only the earliest species of the genus but also are morphologically intermediate between Monorthis Bates, 1968 and the later and more derived species of Ahtiella from Baltica and Cuyania. If, as empirical evidence presented here shows, Ahtiella originated from Monorthis through a series of minor transformations, then the impressive morphological gap between orthides and strophomenides was bridged through short-time cladogenesis events, suggesting that it might not have a definite discontinuity between the species level evolution and the origin of higher taxa (macroevolution).UUID: http://zoobank.org/4b8c5442-ea2c-41b2-97f7-4c0a8b0384a2

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