Results 21 to 30 of about 627 (104)

Paleoenvironmental significance of a new species of freshwater sponge from the Late Miocene Quillagua Formation (N Chile) [PDF]

open access: yesJournal of South American Earth Sciences, 2003
This paper reports the first fossil (Tertiary) occurrence of freshwater sponges of the genus Ephydatia in the southern hemisphere. The sponges appear in diatomite lacustrine sediments of Late Miocene Quillagua Formation (Chile, Atacama region). The investigated specimens represent a new species, Ephydatia chileana sp. nov., which is close to the Recent
Pisera, A., Sáez, Alberto
openaire   +2 more sources

El viaje a Quillagua de Ricardo Latcham en 1932: notas y reflexiones desde un manuscrito inédito

open access: yesBoletín Museo Nacional de Historia Natural, 2021
Este artículo trae a la luz un manuscrito inédito del arqueólogo Ricardo Latcham, proveyendo además de una descripción del mismo y de un contexto contemporáneo sobre las investigaciones arqueológicas realizadas en el oasis de Quillagua, norte de Chile.
Garrido, Francisco, Ballester, Benjamín
openaire   +3 more sources

Late Pliocene lakes and soils: a data-model comparison for the analysis of climate feedbacks in a warmer world [PDF]

open access: yes, 2013
Based on a synthesis of geological data we have reconstructed the global distribution of Late Pliocene soils and lakes which are then used as boundary conditions in a series of model experiments using the Hadley Centre General Circulation Model (HadCM3 ...
Dowsett, Harry   +5 more
core   +1 more source

Oxalate formation under the hyperarid conditions of the Atacama desert as a mineral marker to provide clues to the source of organic carbon on Mars [PDF]

open access: yes, 2016
In this study, we report the detection and characterization of the organic minerals weddellite (CaC2O4 · 2H2O) and whewellite (CaC2O4 · H2O) in the hyperarid, Mars-like conditions of the Salar Grande, Atacama desert, Chile.
Applin, D.M.   +9 more
core   +1 more source

Occurrence of arsenic species in algae and freshwater plants of an extreme arid region in northern Chile, the Loa River Basin [PDF]

open access: yes, 2017
This study reports data on arsenic speciation in two green algae species (Cladophora sp. and Chara sp.) and in five aquatic plants (Azolla sp., Myriophyllum aquaticum, Phylloscirpus cf.
Barbero Castro, Mercedes   +7 more
core   +1 more source

Isotopic Evidence for Marine Consumption and Mobility in the Atacama Desert (Quillagua, Northern Chile)

open access: yesInternational Journal of Osteoarchaeology, 2015
AbstractArchaeological research in the Atacama Desert has recovered evidence of considerable cultural variability. This variability seems to have increased during the Late Intermediate Period (AD 950–1400). The oasis of Quillagua, located at the margins of the Loa River in northern Chile, between the Andes and the coast (70 km from the Pacific Ocean ...
Santana Sagredo, F   +2 more
openaire   +2 more sources

QUILLAGUA Y LOS TEXTILES FORMATIVOS DEL NORTE GRANDE DE CHILE

open access: yesChungará (Arica), 2004
Con el fin de caracterizar los grupos formativos presentes en Quillagua (Loa Inferior), se estudiaron las colecciones textiles de algunos de los sitios m?s caracter?sticos de cada una de las tradiciones culturales identificadas en esa localidad, a saber: Arica, Tarapac?
Agüero, Carolina, Cases, Bárbara
openaire   +2 more sources

Timing of the magmatism of the paleo-Pacific border of Gondwana: U-Pb geochronology of Late Paleozoic to Early Mesozoic igneous rocks of the north Chilean Andes between 20° and 31°S [PDF]

open access: yes, 2014
Indexación: Web of Science; ScieloABSTRACT. U-Pb zircon geochronological data provide record of about 130 Ma of igneous activity in the Andes of northern Chile, which extended episodically from the latest Early Carboniferous to Early Jurassic (328-194 Ma)
Maksaev, Víctor   +2 more
core   +1 more source

LA EXTRACCIÓN PREHISPÁNICA DE RECURSOS MINERALES EN EL INTERNODO QUILLAGUA-COSTA, DESIERTO DE ATACAMA

open access: yesEstudios Atacameños, 2018
En el presente estudio se investigan evidencias de ocupaciones extractivas, desde los resultados de los trabajos arqueológicos en sitios de la conexión vial prehispánica en el internodo entre Quillagua y la costa al norte de Tocopilla en la cordillera de
José F. Blanco   +3 more
doaj   +8 more sources

Alluvial to lacustrine sedimentation in an endorheic basin during the Mio-Pliocene: The Toro Negro Formation, Central Andes of Argentina [PDF]

open access: yes, 2018
A 2400 m-thick sedimentary column belonging to the Toro Negro Formation was recorded along the Quebrada del Yeso, Sierra de Los Colorados (Vinchina Basin), La Rioja province, NW Argentina. The Vinchina basin is a good example of a closed basin surrounded
Amidon, William H.   +4 more
core   +1 more source

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