Results 101 to 110 of about 23,662 (266)

Catastrophic volcanism as a cause of shocked features found at the K/T boundary and in cryptoexplosion structures [PDF]

open access: yes
The presence of quartz grains containing shock lamellae at the Cretaceous/Tertiary (K/T) boundary is viewed by many as the single most compelling evidence of meteoritic or cometary impact because there is no known endogenous mechanism for producing these
Loper, D. E., Mccartney, K.
core   +1 more source

Shallow magma chamber under the Wudalianchi Volcanic Field unveiled by seismic imaging with dense array

open access: yesGeophysical Research Letters, 2016
The Wudalianchi Volcano Field (WDF) is a typical intraplate volcano in northeast China with generation mechanism not yet well understood. As its last eruption was around 300 years ago, the present risk for volcano eruption is of particular public ...
Zhiwei Li   +6 more
doaj   +1 more source

The Origin of Co-Magmatic Andesite Enclaves in the Rabor Miocene Pyroxene Andesites, SE Kerman, Iran: Insights from Textural and Mineralogical Composition [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2012
The Miocene pyroxene andesite lava flows are exposed in southeastern edge of Urumieh Dokhtar Magmatic assemblage in Iran. The hypocrystalline andesite in parts contain conspicuous co-magmatic igneous enclaves which are dark grey and occur mostly as ...
S. S. Dargahi
doaj  

Timescale of open-reservoir evolution beneath the south Cleft segment, Juan de Fuca ridge

open access: yes, 2011
International audienceLavas erupted at the southern end of the intermediate Juan de Fuca ridge (Cleft segment) are mostly cogenetic and their chemical diversity results from melt evolution in an open magma system.
Caroff, Martial   +2 more
core   +3 more sources

The theoretical basis for textural indices of eruption dynamics: review and new conceptual models

open access: yesEarth, Planets and Space
The textural indices of eruption products (pumice, scoria and lavas), number density of crystals or bubbles, or characteristics of their size distributions, have been proposed to estimate dynamic properties such as magma ascent rates, on the basis of ...
Atsushi Toramaru
doaj   +1 more source

Crystallization Sequence and Magma Chamber Processes in the Ferrobasaltic Sept Iles Layered Intrusion, Canada [PDF]

open access: bronze, 2010
Olivier Namur   +5 more
openalex   +1 more source

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