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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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barry barry
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10 years ago
Compare and contrast how the aureole of contact metamorphism will change in both thickness and metamorphic grade (if applicable) depending on the intrusive igneous structure.
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10 years ago
If the igneous structure is small (e.g. a dike), then the aureole will also be small, only a few centimeters in thickness. However, larger igneous bodies have more heat that they will release over a longer period of time. This means that the aureole will be more extensive (several kilometers for those around batholiths) and have zones of metamorphism. High-grade metamorphic minerals such as garnet will form near the magma body whereas low-grade metamorphic minerals such as chlorite will form farther away.
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barry Authorbarry
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10 years ago
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