Paleomagnetism of Cretaceous volcanic rocks from central Chile and implications for the tectonics of the Andes

Geology ◽  
1986 ◽  
Vol 14 (2) ◽  
pp. 132 ◽  
Author(s):  
Myrl E. Beck ◽  
Robert E. Drake ◽  
Robert F. Butler
Keyword(s):  
Volcanic Rocks ◽  
Central Chile ◽  
The Andes

scholarly journals Quaternary Glaciations in the Andes of North-Central Chile

1975 ◽  
Vol 14 (70) ◽  
pp. 155-170 ◽  
Author(s):  
Cesar N. Caviedes ◽  
Roland Paskoff
Keyword(s):  
Polar Front ◽  
Southern Andes ◽  
North Central ◽  
Central Chile ◽  
The Andes ◽  
Semi Arid ◽  
Quaternary Glaciations ◽  
Chilean Andes

The extension of the Quaternary glaciations has been studied in the semi-arid Andes of north-central Chile, where the glacial modelling is striking. In the Elqui valley (lat. 30°S.), two glacial advances were identified reaching down to 3 100 m (Laguna glaciation) and 2 500 m (Tapado glaciation). In the Aconcagua valley (lat. 33°S.), moraines from three major glacial advances were found, at 2 800 m (Portillo glaciation), 1 600 m (Guardia Vieja glaciation) and 1 300 m (Salto del Soldado glaciation).The Quaternary glaciations were linked with a decrease of temperature, but more significantly with a marked increase of precipitation probably related to an equatorward shift of 5–6 degrees of the austral polar front. The results obtained in the semi-arid Chilean Andes are correlated with those recently reported from other sectors of the southern Andes.

Geophysical and geochemical constraints on the age and paleoclimate implications of Holocene lacustrine cores from the Andes of central Chile

2018 ◽  
Vol 33 (2) ◽  
pp. 150-165 ◽  
Author(s):  
Rachel J. Tiner ◽  
Robert M. Negrini ◽  
Jose L. Antinao ◽  
Eric McDonald ◽  
Antonio Maldonado
Keyword(s):  
Central Chile ◽  
The Andes ◽  
Geochemical Constraints

An enigmatic population of Alsodes (Anura, Alsodidae) from the Andes of central Chile with three species-level mitochondrial lineages

2020 ◽  
Vol 31 (1) ◽  
pp. 25-34
Author(s):  
Claudio Correa ◽  
Jesús Morales ◽  
Constantino Schussler ◽  
Juan C. Ortiz
Keyword(s):  
Species Level ◽  
Central Chile ◽  
The Andes

North and South: Hunter-Gatherer Communities in the Andes Mountains in Central Chile

2011 ◽  
Vol 22 (4) ◽  
pp. 487-504 ◽  
Author(s):  
Luis E. Cornejo B. ◽  
Lorena Sanhueza R.
Keyword(s):  
River Valley ◽  
Andes Mountains ◽  
Archaeological Record ◽  
Hunter Gatherers ◽  
Central Chile ◽  
The Andes ◽  
Social Units ◽  
North And South ◽  
Chilean Andes

AbstractOne of the most serious limitations in studies of prehistoric hunter-gatherer societies based on the archaeological record has been the difficulty of establishing distinctions among groups that inhabited a given area at the same time. This article suggests that, at least during a period ranging from 3000 B.C. to A.D. 1000, the Central Chilean Andes, specifically the Maipo River Valley, was occupied by two groups of hunter-gatherers that were distinct enough for us to propose that they were actually two different social units.

Darwin the geologist in southern South America

2016 ◽  
Vol 35 (2) ◽  
pp. 303-345 ◽  
Author(s):  
Robert H. Dott ◽  
Ian W. D. Dalziel
Keyword(s):  
South America ◽  
Charles Darwin ◽  
Lateral Compression ◽  
Central Chile ◽  
Southern South America ◽  
The Andes ◽  
Andean Cordillera ◽  
Marine Terraces ◽  
Four Books ◽  
Geological Map

Charles Darwin was a reputable geologist before he achieved biological fame. Most of his geological research was accomplished in southern South America during the voyage of H.M.S. Beagle (1831–1836). Afterward he published four books and several articles about geology and coral atolls and became active in the Geological Society of London. We have followed Darwin's footsteps during our own researches and have been very impressed with his keen observations and inferences. He made some mistakes, however, such as appealing to iceberg rafting to explain erratic boulders and to inundations of the sea to carve valleys. Darwin prepared an important hand-colored geological map of southern South America, which for unknown reasons he did not publish. The distributions of seven map units are shown. These were described in his books wherein he also documented multiple elevated marine terraces on both coasts of South America. While exploring the Andean Cordillera in central Chile and Argentina, he discovered two fossil forests. Darwin developed a tectonic theory involving vertical uplift of the entire continent, which was greatest in the Andes where magma leaked up from a hypothetical subterranean sea of magma to form volcanoes and earthquakes. The theory had little impact and was soon eclipsed by theories involving lateral compression of strata. His and other contemporary theories suffered from a lack of knowledge about the earth's interior. Finally with modern plate tectonic theory involving intense lateral compression across the Andean Cordillera we can explain satisfactorily the geology so carefully documented by Darwin.

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