Results 51 to 60 of about 2,155,550 (190)
Geochemistry, Geophysics, Geosystems, 2011 Most hydrothermal systems at oceanic spreading centers are underlain by basaltic magma bodies; however, some are underlain by higher‐silica magmas such as andesite or dacite.
Lei Liu, Robert P. Lowell
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River Research and Applications, EarlyView.ABSTRACT As ecosystem engineers, beavers (Castor canadensis) modify river corridor form through dam building. When beavers are removed from a river corridor, their unmaintained dams wash out, altering the stream's hydrologic regime. The assumption that beaver dams increase floodplain connectivity is frequently presumed but has not been directly ...
Kayla Schultz +4 more
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Acta Ophthalmologica, EarlyView.Abstract Purpose Proliferative diabetic retinopathy (PDR) is one of the leading causes of blindness in working‐age adults. We have previously shown that the risk of PDR is significantly elevated in individuals with intrauterine exposure to famine. However, the genetic mechanisms mediating this association remain unknown.
Olena Fedotkina +7 more
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Seismolosical studies of magma injection processes: volcano monitoring and imaging of magma chambers [PDF]
, 2001 The processes associated with magma injection at shallow depths within the crust have been the topic of many geophysical studies, some investigating the seismicity that accompanies volcanic activity and others attempting to map the subsurface extent and ...
Konstantinou, K.I. +1 more
core
The incrementally zoned Miocene Ayagaures ignimbrite (Gran Canaria, Canary Islands) [PDF]
, 2010 The 20–25 m thick trachyphonolitic Ayagaures ignimbrite cooling unit [(AY); 11.8 Ma] exposed over 250 km2 (onshore volume ca. 4.5 km3 DRE) is the uppermost and most voluminous cooling unit of the Middle Fataga Formation (MFF), part of the Fataga Group ...
Hans-Ulrich Schmincke +5 more
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Topology‐based Visual Analysis of Hydrothermal Plumes
Computer Graphics Forum, EarlyView.Abstract Hydrothermal plumes are turbulent structures of intense heat and mineral smoke that rise and disperse into the deep ocean. Existing models generally characterize these systems as a single axisymmetric plume originating from a point source. However, this assumption breaks down in weakly venting, spatially distributed systems, where low‐flux ...
Adhitya Kamakshidasan +3 more
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Exploring and Modeling the Magma–Hydrothermal Regime
Geosciences, 2020 This special issue comprises 12 papers from authors in 10 countries with new insights on the close coupling between magma as an energy and fluid source with hydrothermal systems as a primary control of magmatic behavior.
John Eichelberger +4 more
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Meteoritics &Planetary Science, EarlyView.Abstract Shergottites are the most abundant meteorites from Mars and a major source of information on magma reservoirs, transport, and eruption, particularly in the late Hesperian northern hemisphere. Conflicting interpretations have arisen on the crystallization conditions of pyroxene in olivine‐phyric shergottites.
Roger H. Hewins +2 more
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Effects of magma-generation and migration on the expansion and contraction history of the Moon
Earth, Planets and Space, 2022 Geological and geodetic observations of the Moon from spacecraft revealed that it expanded by a few km for the first several hundred million years and then contracted later.
Kenyo U, Hiroki Hasumi, Masaki Ogawa
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New Phytologist, EarlyView.The MexMAGIC population mixes native maize varieties from across Mexico to study functional genetic diversity. Summary Defining the genetic basis of local adaptation is a key goal of evolutionary biology and crop improvement. Theory predicts that when selective pressures follow differences in the environment, a cline will be established.
Sergio Perez‐Limón +18 more
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