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Granite Layer |
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Granite Layer
(granite-gneiss or metamorphic granite layer), the conventional name for a layer of the earth in which longitudinal seismic waves travel at a velocity of 5.0–6.5 km/sec. On continents, the layer is covered by a sedimentary mantle, with the exception of the shields where the layer is exposed; the layer is typically absent on the ocean floor. In addition to granites, the layer includes gneisses and other metamorphic and igneous rocks. E. N. LIUSTIKH 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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