Results 11 to 20 of about 26,760 (208)
Scientific American, 1961 Evidence gathered by expeditions of the University of California’s Scripps Institution of Oceanography during the International Geophysical Year suggests that the East Pacific Rise is one of the largest physical structures on earth. It runs in a sickle-shaped curve from near New Zealand 8,000 miles to the coast of Mexico.
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Geophysical surveys on the East Pacific Rise -- Galapagos Rise system [PDF]
Geophysical Journal International, 1978 Summary. The East Pacific Rise at 12-15' S is topographically smooth with a crestal horst or linear volcanic peak marking the present axis of spreading. The Galapagos Rise at 14-17's is topographically rough with a possible central graben marking the extinct spreading axis.
R. N. Anderson +3 more
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El Niño Tectonic Modulation in the Pacific Basin (Revisited) [PDF]
Journal of Systemics, Cybernetics and Informatics, 2020 The Easter and Juan Fernandez microplates, two counterclockwise-rotating microplates along the East Pacific Rise, are driven by downwelling tectonic vortices, as explained by a more recent geophysical theory known as the surge tectonic hypothesis.
Bruce A. Leybourne, Michael B. Adams
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Comparison of calculated energy flux of internal tides with microstructure measurements [PDF]
Tellus: Series A, Dynamic Meteorology and Oceanography, 2014 Vertical mixing caused by breaking of internal tides plays a major role in maintaining the deep-ocean stratification. This study compares observations of dissipation from microstructure measurements to calculations of the vertical energy flux from ...
Saeed Falahat +4 more
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Radiocarbon, 1988 This study was carried out in cooperation with Steve Emerson of the University of Washington. The purpose was to obtain benthic-planktonic and planktonic-planktonic age differences on hand-picked foraminifera shells. Material was taken from two separate subcores from the primary 50cm2 box core (see Tables 8, 9).
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Morphology and dynamics of inflated subaqueous basaltic lava flows
Geochemistry, Geophysics, Geosystems, 2014 During eruptions onto low slopes, basaltic Pahoehoe lava can form thin lobes that progressively coalesce and inflate to many times their original thickness, due to a steady injection of magma beneath brittle and viscoelastic layers of cooled lava that ...
Anne Deschamps +6 more
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Geochemistry, Geophysics, Geosystems, 2023 A tectonic window into the upper 2,000 m of oceanic crust generated at the superfast spreading (∼142 mm/yr) southern East Pacific Rise exposes a continuous layered structure of basaltic lavas and sheeted dikes over gabbroic rocks.
J. A. Karson +8 more
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Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity [PDF]
Geofísica Internacional, 1999 A type-model of the geological structure of the Jalisco subduction zone was determined by matching gravity anomalies observed along a profile perpendicular to the Jalisco coast near Barra de Navidad with the gravitational attraction of a geologic cross
M. Mena +3 more
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BMC Evolutionary Biology, 2010 Background Comparative phylogeography recently performed on the mitochondrial cytochrome oxidase I (mtCOI) gene from seven deep-sea vent species suggested that the East Pacific Rise fauna has undergone a vicariant event with the emergence of a north ...
Plouviez Sophie +4 more
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Asymmetric seafloor depth across the Juan de Fuca Ridge caused by lithospheric heating
Communications Earth & Environment, 2023 Previous studies attribute asymmetries across the East Pacific Rise to horizontal temperature or pressure gradients in the deep asthenosphere caused by the Pacific Superswell, which, however, cannot explain asymmetries observed across the Juan de Fuca ...
Mengyu Wu, Michael H. Ritzwoller
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