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intrusive rock |
Also found in: Medical, Legal, Wikipedia, Hutchinson | 0.04 sec. |
intrusive rockIgneous rock formed from magma forced into older rocks at depths within the Earth's crust, which then slowly solidifies below the Earth's surface, though it may later be exposed by erosion. Igneous intrusions form a variety of rock types. See also extrusive rock. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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They have a good handle on the properties of the River Valley Intrusive's 12-km contact and now are working to expand away from the line into the intrusive rocks. This assemblage of the sedimentary, exhalative, and intrusive rock, is common with similar belts elsewhere in the Guiana Shield of Brazil, the Guainas, and Venezuela. The geological setting of the La Reforma Mine is complex and consists of Mesozoic age, carbonate rich, meta-sedimentary and meta-volcanic rocks which are intruded by several phases of intrusive rocks from Cretaceous to Miocene time. |
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intrusive rock
