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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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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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Hydrothermal Germanium Over the Southern East Pacific Rise
Science, 1986Germanium enrichment in the oceanic water column above the southern axis of the East Pacific Rise results from hydrothermal solutions emanating from hot springs along the rise crest. This plume signature provides a new oceanic tracer of reactions between seawater and sea floor basalts during hydrothermal alteration.
R A, Mortlock, P N, Froelich
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Seismic Structure of the Southern East Pacific Rise
Science, 1993Seismic data from the ultrafast-spreading (150 to 162 millimeters per year) southern East Pacific Rise show that the rise axis is underlain by a thin (less than 200 meters thick) extrusive volcanic layer (seismic layer 2A) that thickens rapidly off axis.
R S, Detrick +5 more
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East Pacific Rise Crest: A Near-Bottom Geophysical Profile
Science, 1969A deep-towed magnetometer profile made across the East Pacific Rise crest shows many anomalies with about 1000-gamma amplitudes and 500-meter wavelengths and has larger amplitude changes corresponding to magnetic field reversals. This profile across contacts between normal and reversely magnetized crustal blocks is interpreted to place an upper limit ...
R L, Larson, F N, Spiess
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On the spreading of the East Pacific Rise
Tectonophysics, 1990Abstract We analyze through statistical methods the mechanics of the East Pacific Rise by considering the relative angular velocities of spreading of the Pacific-Nazca, Pacifie-Cocos and Pacific-Rivera margins. We focus our attention on verifying the validity of some issues such as the constancy of the velocity of spreading, the symmetry of the ...
Marzocchi, W., Mulargia, F.
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Uranium Rich Sediments on the East Pacific Rise
Nature, 1969SEDIMENTS on mid-ocean ridges associated with ocean floor spreading and high heat flow are poor in Al, Ti, Si, Cu, Co, Ni and rare earth elements, and enriched in Fe, Mn, V, Cd, Hg, As, B, Cr, Ba and P, compared with other pelagic sediments. The origin of these distribution patterns is not fully understood but is most likely the result of volcanic ...
DAVID E. FISHER, KURT BOSTROM
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A226Ra section across the East Pacific Rise
Earth and Planetary Science Letters, 1980Abstract Four vertical Ra profiles have been measured across the East Pacific Rise (EPR) from Callao to Tahiti. These profiles show that Ra in the deep water (below 2 km depth) increases toward the EPR. However, this increase does not necessarily indicate a Ra source on the EPR.
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Late Tertiary date from the East Pacific Rise
Journal of Geophysical Research, 1967A potassium-argon date from a basalt boulder dredged from a seamount near the crest of the northern extension of the East Pacific rise is 27±6 m.y. This note presents evidence for the association of Cobb seamount and its geologic age with the axial zone of the East Pacific rise.
Thomas F. Budinger, Betty J. Enbysk
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Stauromedusae on the East Pacific Rise
2006Dense aggregations of the large stauromedusae Lucernaria janetae Collins & Daly, 2005 are known from four sites near East Pacific Rise hydrothermal vents, but as is typical of circum-vent animals, their biology remains virtually unstudied. Observations of stauromedusae from near 8°36'N find that they are consistently near fissures from which warm,
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Sea-floor lava fields on the East Pacific Rise
Deep Sea Research Part B. Oceanographic Literature Review, 1985A SeaBeam and SeaMARC I survey of a seamount group located several kilometres west of the axis of the East Pacific Rise (EPR) at lat 9°53′N defines the existence of a large submarine lava field at the base of one of the volcanoes (MIB). The field must be relatively young with respect to the surrounding terrain because lavas lap up against the base of ...
Daniel J. Fornari +2 more
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