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Achim D. Herrmann, John T. Haynes, Richard M. Robinet and Norlene R. Emerson
Altered tephras (K-bentonites) are of great importance for calibration of the geologic time scale, for local, regional, and global correlations, and paleoenvironmental reconstructions. Thus, definitive identification of individual tephras is critical. Si...
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Derek J. Weller, María Eugenia de Porras, Antonio Maldonado, César Méndez, Charles R. Stern
Pág. 229 - 248
Sediment cores from lakes and bogs in the Río Cisnes valley contain tephra from explosive eruptions of
volcanoes in the southern part of the Andean Southern Volcanic Zone (SSVZ). These tephra, which thicken and coarsen
to the west, are attributed to erup...
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Charles Stern, Patricio I. Moreno, William I. Henríquez, Rodrigo Villa-Martínez, Esteban Sagredo, Juan C. Aravena, Ricardo de Pol-Holz
Pág. 1 - 19
Two Holocene tephras encountered in outcrops, cores and trenches in bogs, and lake cores in the area
around Cochrane, southern Chile, are identified (based on their age, tephra glass color and morphology, mineralogy,
and both bulk and glass chemistry) as...
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Charles Stern,María Eugenia de Porras,Antonio Maldonado
Pág. 173 - 189
Based on their petrography and chemistry, 18 tephra analyzed from two lake and bog cores and one outcrop in the upper Río Cisnes valley are believed to have been derived from nine different eruptions of the Mentolat volcano, four of the Melimoyu volcano,...
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Jose A. Naranjo,Charles R. Stern
Pág. 225 - 240
Tephra deposits exposed in road-cuts in both Chile and Argentina between approximately 42°30' to 45°S preserve evidence of four small (VEI <3 and volume <0.15 km3) and seven medium size (VEI = 3-5 and volume between 0.15 to 1 km3), or possibly larg...
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Rolf Kilian,Miriam Hohner,Harald Biester,Hans J. Wallrabe-Adams,Charles R. Stern
Pág. 32 - 37
Peat and lake sediment cores from Peninsula Muñoz Gamero in the southernmost Main Andean Cordillera, and also Seno Skyring fjord and Peninsula Brunswick in the Andean foothills, have been investigated to refine the local Holocene tephrochronology. New 14...
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