 
Earth Science: Geology, the Environment, and the UniverseChapter 5:
Igneous RocksWeb Links
Intrusive Rocks | | If you ever were wondering exactly what some of the types of intrusive rocks look like, here's a site that gives some visual examples. How does gabbro differ from breccia? (
http://www.geosurv.gov.nf.ca/education/features/intrusiv.html
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Touring Colorado Geology - Igneous Rocks | | This is a private site a rockhound put up to compare intrusive and extrusive igneous rocks side-by-side. How do these two types of rocks differ from each other in outward appearance? (
http://www.geocities.com/jghist/Glossary/igneous.htm
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