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transition zone |
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transition zone [tran′zish·ən ‚zōn]
(fluid mechanics) Those conditions of fluid flow in which the nature of the flow is changing from laminar to turbulent. (geology) A region within the upper mantle bordering the lower mantle, at a depth of 246-600 miles (410-1000 kilometers), characterized by a rapid increase in density of about 20% and an increase in seismic wave velocities. A region within the outer core, transitional to the inner core. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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