Results 81 to 90 of about 30,947 (278)

Managing and visualising geochemical data for tephra correlation with the IntChron Integration Tool

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT There is now a wealth of glass‐shard geochemical data for volcanic ash (tephra) layers from a wide range of volcanoes and eruptions, providing invaluable datasets for tephrochronology. However, compilation of published data to assess tephra correlations leads to large files and requires careful management.
Victoria C. Smith   +5 more
wiley   +1 more source

(Table 3) Trace element composition of basalts from DSDP Leg 65 holes

open access: yes, 2005
(Table 3) Trace element composition of basalts from DSDP Leg 65 ...
Bougault, Henri   +7 more
core   +1 more source

Electron probe microanalysis of extremely fine‐grained tephras: new protocols and insights for analyses at the 1 μ ${\rm{\mu }}$m scale

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Volcanic ash (tephra) provides an important chronostratigraphic framework for correlating Quaternary records. In ultra‐distal ( > $\gt $1500 km) settings such as ice cores and marine sediments, deposits are typically preserved as cryptotephra composed of glass shards ≤ 20 μ $\le 20\,\mu
Celeste Smith   +6 more
wiley   +1 more source

Continental Flood Basalts

open access: yes, 2002
This PowerPoint presentation is part of the Whitman College petrology course. This 17-slide presentation addresses the major flood basalts. The Columbia River flood basalts are discussed in detail.
John Winter
core  

(Table 3) Trace element contents in basalts of the Kara Sea

open access: yes, 2004
(Table 3) Trace element contents in basalts of the Kara ...
Gennady S Kharin (6959660)   +5 more
core   +1 more source

First finding of Icelandic tephra in Czechia: Vedde Ash identified in palaeolake sediments of Stará Jímka

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT In this study, we report the first documented occurrence of the Icelandic Vedde Ash (VA) in the Bohemian Forest, identified within palaeolake sediments from Stará Jímka, Czechia, representing the first Icelandic tephra layer identified in Czechia.
Verena Meier   +3 more
wiley   +1 more source

(Table 73) Vein minerals from basalts of the Nauru Basin, DSDP Site 61-462

open access: yes, 1986
(Table 73) Vein minerals from basalts of the Nauru Basin, DSDP Site 61 ...
Victor B Kurnosov (6958511)   +1 more
core   +1 more source

Climate‐modulated accumulation and erosion of sediments in the Rodderberg crater basin for the last 439 ka (East Eifel Volcanic Field, Germany)

open access: yesJournal of Quaternary Science, EarlyView.
ABSTRACT Glacial/interglacial climate cycles since marine isotope stage (MIS) 12 influenced the discontinuous and 73 m‐long sediment record from the volcanic crater of Rodderberg in the East Eifel Volcanic Field, Germany. High‐resolution grain size and geochemical data have been valued by numerical dating techniques (radiocarbon and luminescence dating,
Bernd Zolitschka   +4 more
wiley   +1 more source

Geochemical modeling of basic pegmatites from Foz do Iguaçu in the Itaipu region, western Paraná, Brazil

open access: yesGeologia USP. Série Científica, 2023
In the westernmost portion of the state of Paraná, in the city of Foz do Iguaçu, basic pegmatites occur within inflated pahoehoe basaltic flows of the Paraná Igneous Province.
Bruno Titon   +3 more
doaj  

(Table 2) Major element composition of basalts from DSDP Leg 65 holes

open access: yes, 2005
(Table 2) Major element composition of basalts from DSDP Leg 65 ...
Bougault, Henri   +7 more
core   +1 more source

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