Results 31 to 40 of about 709,886 (262)

El volcanismo jurásico superior de la Formación Río Damas-Tordillo (33°-35,5°S): antecedentes su sobre petrogénesis, cronología, proveniencia e implicancias tectónicas [PDF]

open access: yes, 2014
Los depósitos continentales y volcánicos de la Formación Rio Damas-Tordillo, Jurásico Superior, representan un período restringido de sedimentación continental dentro del registro mayormente marino de la Cuenca Neuquina.
Calderón, Sergio   +7 more
core   +2 more sources

A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

open access: yesPapers in Palaeontology, 2023
Polychaetes, echinoids and gastropods have been proposed as tracemakers for Bolonia Meunier, an elongate positive epirelief trace fossil characterized by two lobes composed of biserial, subtriangular pads and a mostly heart‐shaped cross‐section.
Luciana M. Giachetti   +4 more
semanticscholar   +1 more source

Influence of pre-Andean history over Andean foreland deformation: structural styles in the Malargüe fold-and-thrust belt at 35ºS, Andes of Argentina [PDF]

open access: yes, 2014
We present the first complete balanced cross-section of the Argentinean Andes at 35ºS. Based on an extensive field survey and limited sub-surface information, we constructed a structural model in which both the tectonic inversion of Mesozoic normal ...
Giambiagi, Laura Beatriz   +4 more
core   +1 more source

Unrest at Domuyo Volcano, Argentina, detected by geophysical and geodetic data and morphometric analysis [PDF]

open access: yes, 2019
New volcanic unrest has been detected in the Domuyo Volcanic Center (DVC), to the east of the Andes Southern Volcanic Zone in Argentina. To better understand this activity, we investigated new seismic monitoring data, gravimetric and magnetic campaign ...
Acosta, Gemma   +6 more
core   +1 more source

Malignant melanoma of the urethra: a rare histologic subdivision of vulvar cancer with a poor prognosis [PDF]

open access: yes, 2012
Malignant melanoma of the urethra is a rare tumour that is difficult to diagnose and treat, resulting in a poor prognosis. In this paper, we present the case of a 65-year-old woman who was referred to a gynaecologist because of a urethral mass that ...
Alkatout, Ibrahim   +8 more
core   +2 more sources

First palynologic record of the Cretaceous La Yesera Formation (Salta Group), northwestern Argentina [PDF]

open access: yes, 2014
Thirty-four taxa were documented from six palynologically productive samples of the La Yesera Formation (Brealito and Don Bartolo Members) in the Pucará locality (Salta Province, northwestern Argentina).
Narvaez, Paula Liliana   +2 more
core   +1 more source

Variability of continental depositional systems during lowstand sedimentation: an example from the Kimmeridgian of the Neuquen Basin, Argentina

open access: yesLatin American Journal of Sedimentology and Basin Analysis, 2021
Several second order lowstand wedges are recognized in the Jurassic-Early Cretaceous sedimentary record of the backarc Neuquén Basin (central-west Argentina).
Luis A. Spalletti, Gonzalo D. Veiga
doaj   +2 more sources

First teuthid cephalopod from the Lower Jurassic of South America (Neuquén Basin, Argentina)

open access: yesGeologica Acta, 2005
A new species of squid, Teudopsis jeletzkyi n. sp., is described from the Toarcian (Lower Jurassic) of the Los Molles Formation in Neuquen Province, central west Argentina. Fossil squids have thus far been unknown in the Mesozoic of South America.
A. C. (Alberto Carlos) Riccardi
doaj   +1 more source

Ofiuroideos del Cretácico Inferior de Patagonia: primer registro fósil articulado para el Mesozoico de América del Sur [PDF]

open access: yes, 2019
The first articulated remains of ophiuroids for the Mesozoic of South America are described from the Lower Cretaceous of Neuquén Basin, Argentina.
Comerio, Marcos   +6 more
core   +2 more sources

An Early Cretaceous astropectinid (Echinodermata, Asteroidea) from Patagonia (Argentina): a new species and the oldest record of the family for the Southern Hemisphere [PDF]

open access: yes, 2014
Los asterozoos son echinodermos de vida libre, con forma de estrella, y componentes importantes de las faunas marinas bentónicas a nivel mundial. Su registro fósil, sin embargo, es pobre y fragmentario, probablemente debido a la desarticulación de los ...
Carrizo, Martin Alejandro   +3 more
core   +1 more source

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