Results 1 to 10 of about 163 (113)
Aportes metodológicos para el estudio de la tecnología lítica tallada en cuarzo (Argentina)
Arqueologia, 2022 El cuarzo fue una de las materias primas más utilizada para la manufactura de instrumentos líticos a través del tiempo y del espacio. Sin embargo, su gran dureza, la presencia de planos de fractura y otras imperfecciones causaron que no haya sido ...
Enrique Alejandro Moreno +6 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 10, October 2023., 2023 Abstract Seamounts and ridges are often invoked to explain subduction‐related phenomena such as flat slab generation, but the extent of their involvement remains controversial. An analysis of seismicity in the region of the Pampean flat slab through an application of an automated catalog generation algorithm resulted in 35,924 well constrained local ...
A. Maharaj +5 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 10, October 2023., 2023 Abstract Torn and bent slabs are usually associated with flat‐slab subduction where the descending plate develops a horizontal geometry beneath the overlying continent. How such slab dynamics modify the surrounding mantle flow and the overriding plate remains enigmatic.
Xiaowen Liu, Russell Pysklywec
wiley +1 more source
Piedmont deposits as seismic energy dissipators, Sierras Pampeanas of Argentina
SN Applied Sciences, 2021 This study shows the neotectonic deformation occurred in the southern piedmont of the Cumbres Calchaquíes, in the Amaicha and Tafí valleys. Neotectonic deformation manifests itself through faults, folds and diversions of drainage channels.
Adolfo Antonio Gutiérrez +3 more
doaj +1 more source
Tectonics, Volume 42, Issue 8, August 2023., 2023 Abstract The southern Central Andes (SCA, 27°–40°S) exhibit a complex deformation pattern that is influenced by multiple factors, including the present‐day dip angle of the subducting oceanic Nazca plate and the influence of inherited heterogeneities in the continental South American plate. This study employs a data‐driven geodynamic workflow to assess
Michaël Pons +4 more
wiley +1 more source
Revista Mexicana de Ciencias Geológicas, 2018 The Sierra de Pie de Palo (Western Sierras Pampeanas, Argentina) in the Andean foreland is mainly formed by a Mesoproterozoic basement and an Ediacaran metasedimentary cover referred to as the Difunta Correa metasedimentary sequence.
Carlos Ramacciotti +3 more
doaj +1 more source
Tectonics, Volume 42, Issue 8, August 2023., 2023 Abstract The Upper Cretaceous Frontier Formation in southwestern Montana is coeval with the transition from Sevier‐ to Laramide‐style tectonism in the Idaho‐Montana sector of the North American Cordillera. To better constrain the timing of initial exhumation above the Laramide‐style Blacktail‐Snowcrest arch, we use biostratigraphic data, sandstone ...
E. S. Finzel +3 more
wiley +1 more source
Stepwise Widening of the Central Andes—The Role of the Lower Crust
Geophysical Research Letters, Volume 50, Issue 12, 28 June 2023., 2023 Abstract The outward growth of many orogens occurs through pulsed migration of the strain front. During Cenozoic shortening of the central Andes, the strain front abruptly migrated ∼400 km eastward across the Altiplano, isolating the plateau interior from major deformation.
Huilin Wang, Claire A. Currie
wiley +1 more source
Estudios Geologicos, 1992 La Formación Chango Real (sierras de Culampajá y Papachacra) es parte del magmatismo paleozoico de las Sierras Pampeanas noroccidentales (NW de la Argentina).
J. E. Lazarte
doaj +1 more source
Journal of Maps, 2023 The aim of this paper is to present a detailed geomorphological map of the western piedmont of Cumbres Calchaquíes (Tucumán Province, NW Argentina) bounded by the Amaicha River to the south and the administrative border with Salta Province to the north ...
María Marta Sampietro-Vattuone +1 more
doaj +1 more source