Mafic Definition
In geology, “mafic” is a term that describes an igneous rock that has an abundance of darker color minerals.
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Embankment Dam
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Terrestrial Planet Definition
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Dip-Slip Fault Definition
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Seismic Risk Definition
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Extrusive Rocks
Extrusive Rocks Extrusive Rocks: In the volcanology branch of geology extrusive rocks are igneous rocks that have been erupted onto the Earth’s surface, before forming and crystallizing. On the other hand, intrusive rocks form and crystallize under the Earth’s ground surface. Extrusive rocks are typically microcrystalline and aphanitic, because of the faster rate of cooling…
