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Paleomagnetism of Hawaiian lava flows
Journal of Geophysical Research, 1961Paleomagnetic studies of lavas from the island of Hawaii have established the following: (1) All lavas now exposed on the island are less than 1 million years old (Pleistocene). (2) The present absence of nondipole field components in the central Pacific area is a relatively permanent feature, having lasted at least several hundred thousand years.
RICHARD R. DOELL, ALLAN COX
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Geological Society, London, Special Publications, 2015
Abstract Prediction of the emplacement of volcanic mass flows (lava flows, pyroclastic density currents, debris avalanches and debris flows) is required for hazard and risk assessment, and for the planning of risk-mitigation measures. Numerical computer-based models now exist that are capable of approximating the motion of a given volume of ...
Cordonnier, B., Lev, E., Garel, Fanny
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Abstract Prediction of the emplacement of volcanic mass flows (lava flows, pyroclastic density currents, debris avalanches and debris flows) is required for hazard and risk assessment, and for the planning of risk-mitigation measures. Numerical computer-based models now exist that are capable of approximating the motion of a given volume of ...
Cordonnier, B., Lev, E., Garel, Fanny
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2000
On Earth, most lavas have silica contents in the range from 30 to 78 wt%, and they are erupted at temperatures between 800 and 1170°C (see Chapter 2). However, some lavas have compositions and eruption temperatures outside this range. These are the exotic lavas that we will describe in this chapter.
Harry Pinkerton +4 more
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On Earth, most lavas have silica contents in the range from 30 to 78 wt%, and they are erupted at temperatures between 800 and 1170°C (see Chapter 2). However, some lavas have compositions and eruption temperatures outside this range. These are the exotic lavas that we will describe in this chapter.
Harry Pinkerton +4 more
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Journal of Geophysical Research: Earth Surface, 2022
AbstractFlowing lava and water have dramatically different physical properties but can form similar hydraulic structures, including undular hydraulic jumps, or standing wave trains. In water flows, undular hydraulic jumps are evidence of critical flow (Froude number ∼1) and open‐channel hydraulic theory provides a powerful tool for estimating flow ...
H. R. Dietterich +4 more
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AbstractFlowing lava and water have dramatically different physical properties but can form similar hydraulic structures, including undular hydraulic jumps, or standing wave trains. In water flows, undular hydraulic jumps are evidence of critical flow (Froude number ∼1) and open‐channel hydraulic theory provides a powerful tool for estimating flow ...
H. R. Dietterich +4 more
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Flow Direction Determination of Lava Flows
Geological Society of America Bulletin, 1972The flow direction technique, previously applied to ash-flow sheets, can be used to determine direction of movement and locate eruptive centers for lava flows. The method provides statistically stronger and more consistent flow direction data for lava than ash-flow tuff.
EUGENE I. SMITH, RODNEY C. RHODES
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Journal of Geophysical Research, 1972
Extensive lava flows, like those of the Columbia plateau of Washington state, require thicknesses only of the order of meters and temperatures only slightly above the melting point to spread over distances of the order of hundreds of kilometers. Other things being equal, the spreading distance is proportional to the cube of the thickness of the flow.
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Extensive lava flows, like those of the Columbia plateau of Washington state, require thicknesses only of the order of meters and temperatures only slightly above the melting point to spread over distances of the order of hundreds of kilometers. Other things being equal, the spreading distance is proportional to the cube of the thickness of the flow.
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Geological Magazine, 1931
For many years composite minor intrusions, both sills and dykes, have been known from various parts of the world and most petrologists must have speculated as to the probable effect produced in the event of such composite intrusions having reached the surface in the form of an effusion.
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For many years composite minor intrusions, both sills and dykes, have been known from various parts of the world and most petrologists must have speculated as to the probable effect produced in the event of such composite intrusions having reached the surface in the form of an effusion.
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