The formation of melt inclusions appears to be a normal part of the crystallization of minerals within magmas, and they can be found in both volcanic and plutonic rocks. Determining the number of years that have elapsed since an event occurred or the specific time when that event occurred. Professional Development Gerontology for Teachers: You will also be able to: Using the principle of cross-cutting relationships outlined above, determine the relative ages of these three rock types. Already registered?
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Learn how scientists determine the ages of rocks and fossils. Great way to memorize science concepts. A fracture in a rock along which movement occurs geomagnetic polarity time scale: Plant ChemCast. Lesson Transcript.