Results 81 to 90 of about 21,586 (203)

Krasheninnikov Caldera (Eastern Kamchatka): age and magnitude of eruption

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле
New data on the composition of the pyroclastic deposits of the Krasheninnikov caldera allowed us to correlate it to the previously studied tephra horizon Geys30, which until recently was erroneously attributed to an eruption within the Geysernaya caldera.
V.V. Ponomareva   +5 more
doaj   +1 more source

Guide to the geology of Bradgate Park and Swithland Wood, Charnwood Forest [PDF]

open access: yes, 2010
Charnwood Forest is one of the few parts of England where there are exposures of ‘basement’ rocks dating back to Precambrian time. Its locally rugged topography is caused by these highly resistant rocks protruding as craggy knolls through a surrounding ...
Carney, J.N.
core  

Debris Flow and Pyroclastic Flow at Unzen Volcano

open access: yesJAPANESE JOURNAL OF MULTIPHASE FLOW, 1993
Unzen Volcano began to erupt in November 1990 after 198 years of dormancy and has remained active. Continuous growth of a lava dome and falls of lava rocks have resulted in frequent pyroclastic flows. Since a great volume of volcanic material has been deposited and scattered by the pyroclastic flows, debris flows have frequently occurred along the ...
openaire   +2 more sources

Once despised now desired: innovative land use and management of multilayered Pumice Soils in the Taupo and Galatea areas, central North Island, New Zealand [PDF]

open access: yes, 2014
The tour brings together innovative land use change and management associated with dairy farming, and land-based effluent disposal, on weakly weathered and multi-layered, glass-rich, Pumice Soils (Vitrands) in the Taupo and Galatea areas.
Balks, Megan R.   +2 more
core   +1 more source

Volcanological constraints of Archaean tectonics [PDF]

open access: yes
Volcanological and trace element geochemical data can be integrated to place some constraints upon the size, character and evolutionary history of Archean volcanic plumbing, and hence indirectly, Archean tectonics.
Ayres, L. D., Thurston, P. C.
core   +1 more source

A study of stability analysis of pyroclastic covers based on electrical resistivity measurements

open access: yes, 2012
Usually, the degree of stability of a slope is quantified by the Factor of Safety whose values depend on physical and mechanical soil properties analyzed on samples of much reduced sizes or referring to very small soil volumes around porous probes.
Di Maio, Rosa, Piegari, Ester
core   +1 more source

Calcite-saturated natrocarbonatites: composition, crystal morphology, and weathering

open access: yesVolcanica
Interpretation of calcite-dominated fossil carbonatite volcanoes is complicated by the instability of many igneous carbonatite materials on Earth’s surface.
Michael Anenburg, Izzan Nur Aslam
doaj   +1 more source

Igneous processes within late Precambrian volcanic centres near Whitwick, northwestern Charnwood Forest [PDF]

open access: yes, 2000
Precambrian rocks in northwestern Chamwood Forest differ markedly from their lateral equivalents to the east and south. They are subdivided into the Whitwick Volcanic Complex, of massive to intensely brecciated high-silica andesites and porphyritic ...
Carney, John
core  

Proceedings of a workshop on Lunar Volcanic Glasses: Scientific and Resource Potential [PDF]

open access: yes
This workshop on lunar mare volcanism was the first since 1975 to deal with the major scientific advances that have occurred in this general subject, and the first ever to deal specifically with volcanic glasses.
Delano, John W., Heiken, Grant H.
core   +1 more source

Analysis of the 4 December 2021 lahar on Mount Semeru using optical and SAR remote sensing

open access: yesInternational Journal of Applied Earth Observations and Geoinformation
This study characterizes the amplitude changes associated with the 4 December 2021 eruption of Mount Semeru and maps the resulting deposits using Sentinel-1 SAR backscatter and PlanetScope optical imagery.
Samuel McGowan   +4 more
doaj   +1 more source

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