Results 171 to 180 of about 3,825 (220)

Structure of the Mid‐Atlantic Ridge

Eos, Transactions American Geophysical Union, 1949
Atlantis Cruise 150, sponsored by the National Geographic Society, Columbia University, and the Woods Hole Oceanographic Institution, was a two month trip to Bermuda, the Azores the Mid‐Atlantic Ridge in the summer of 1947. A continuous record of depth beneath the ship along the track gave significant topographic information and provided a valuable ...
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Microearthquake Survey of the Mid-Atlantic Ridge

Nature, 1972
THE association of earthquakes with the axis of the Mid-Atlantic ridge is well known1–4, and it has been realized that where a median valley existed, the pattern of epicentres stratified it5,6. The first motions and distribution of earthquakes along fracture zones confirm the hypothesis of transform faults and hence give support to ideas of sea floor ...
T. J. G. FRANCIS, I. T. PORTER
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Rocks of the Mid-Atlantic Ridge

The Journal of Geology, 1949
A remarkable achievement by the Atlantis expedition (1947) of the Woods Hole Oceanographic Institution, under the leadership of Professor Maurice Ewing, was the recovery of several hundred pounds of boulders from depths approaching 2,500 fathoms over the Mid-Atlantic Ridge.
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Mid-Atlantic Ridge near 43°N latitude

Journal of Geophysical Research, 1969
The results of a reconnaissance bathymetric and magnetic survey of the mid-Atlantic ridge between 42° and 45°N latitude show a symmetrical north-south magnetic pattern parallel to the axis over the two southernmost of six profiles across the ridge. The southern profiles are also characterized by a well developed central rift valley.
J. D. Phillips, G. Thompson, R. P. Von Herzen, V. T. Bowen   +3 more
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Magnetic spherules from the Mid-Atlantic Ridge

Geology, 1975
Scanning electron microscope investigations of magnetic spherules similar to those thought to be the ablation products of meteorites reveal microstructures that may be significant in determining the origin of the spherules.
F. Aumento, W. S. Mitchell
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Cephalopods of the northern Mid-Atlantic Ridge

Marine Biology Research, 2010
Abstract A two-leg cruise of R/V G. O. Sars in summer of 2004 along the Mid-Atlantic Ridge explored the diversity and distribution patterns of pelagic and non-hydrothermal bottom communities in the vicinity of the northern Mid-Atlantic Ridge. In total, 1295 cephalopods were caught, representing 56 species.
Vecchione, Michael, Young, Richard E., Piatkowski, Uwe   +2 more
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Petrologic models for the Mid-Atlantic Ridge

Deep Sea Research and Oceanographic Abstracts, 1970
Abstract Serpentinites and metabasites (metabasalts and metagabbros) occur in association with unmetamorphosed basalts in transverse fracture zones cutting deeply across the Mid-Atlantic Ridge. The serpentinites appear to have been formed by hydration of upper mantle peridotites.
Akiho Miyashiro, Fumiko Shido, Maurice Ewing   +2 more
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Ecology of Mid-Atlantic Ridge hydrothermal vents

Geological Society, London, Special Publications, 1995
Abstract In the past year, the number of explored deep-water vent sites on the Mid-Atlantic Ridge has doubled. The fauna of Atlantic vents consists for the most part of a subset of invertebrate types found elsewhere in chemosynthetic ecosystems, with taxonomic differentiation usually at the species or genus level.
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Ultramafic Rocks from the Mid-Atlantic Ridge

Nature, 1968
ACCORDING to the ideas of Hess1 the backbone of active mid-oceanic ridges should consist of peridotites which originated in the Earth's mantle and were subsequently upthrusted into the crust along the axis of ridges, above the up welling limbs of mantle's thermal convection cells.
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Argon-Lead Isotopic Correlation in Mid-Atlantic Ridge Basalts

Science, 1999
Step-heating analyses for Mid-Atlantic Ridge glass samples show that maximum 40 Ar/ 36 Ar values correlate with 206,207,208 Pb/ 204 Pb. These correlations hold for the whole Atlantic Ocean and therefore are unlikely to result from shallow-level ...
, Sarda, , Moreira, , Staudacher
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