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Mostrando ítems 11-20 de 306
Indirect tephra volume estimations using theorical models for some Chilean historical volcanic eruptions with sustained columns
(Universita di Trieste, 2013-12)
Actually, the estimation of the volumes of fallout deposits gave us the possibility to determine a series of eruptive parameters, which are also accepted to classify the magnitude and intensity of those eruptions. If most ...
New records of late Holocene tephras from Lake Futalaufquen (42.8°S), northern Patagonia
(Pergamon-Elsevier Science Ltd, 2016-03)
In regions with limited knowledge of the historical volcanic record, like remote areas in the Andean Southern Volcanic Zone, the definition of reliable age-depth models for lake sequences represents a valuable tool for ...
Refinement of the tephrostratigraphy straddling the northern Patagonian Andes (40–41°S): new tephra markers, reconciling different archives and ascertaining the timing of piedmont deglaciation
(2022)
We describe the stratigraphy, age, geochemistry and correlation of tephra from west to east across the northern Patagonian Andes (c. 40–41°S) with a view to further refining the eruptive history of this region back to the ...
Comparison of lake and land tephra records from the 2015 eruption of Calbuco volcano, Chile
(Springer Verlag, 2019)
Tephra layers in lake sediment cores are regularly used for tephrostratigraphy as isochronous features for dating and recording eruption frequencies. However, their value for determining volcanic eruption size and style ...
Stratigraphy, age and correlation of Lepue Tephra: a widespread c. 11 000 cal a BP marker horizon sourced from the Chaiten Sector of southern Chile
(2017)
We describe the stratigraphy, age and correlation of a prominent tephra marker, named Lepue Tephra, extensively distributed in north-western Patagonia. Lepue Tephra is well dated at c. 11 000 cal a BP from numerous lake ...
Petrology, geochemistry, and correlation of tephra deposits from a large early-Holocene eruption of Mentolat volcano, southern Chile
(Pergamon-Elsevier Science Ltd, 2019-03)
Two correlated tephra deposits, each 13 cm thick in the Aisén region of southern Chile, one in a lacustrine sediment core from the Mallín el Toqui (MET) peat bog and another from a subaerial soil exposure ∼10 km to the ...
The impact of recent volcanic ash depositions on herbivores in Patagonia: A review
(Australian Rangeland Society, 2016-02)
Volcanic tephra (ejected solids) result in varied impacts on ecosystems and livestock production. The recent Puyehue (2011) and Calbuco (2015) eruptions deposited large amounts of tephra in Chile and Argentina, affecting ...
Tephrochronology of the southernmost Andean Southern Volcanic Zone, Chile
(Springer, 2015)
Correlations among and identification of the source volcanoes for over 60 Late Glacial and Holocene tephras preserved in eight lacustrine sediment cores taken from small lakes near Coyhaique, Chile (46 degrees S), were ...