naming igneous rocks by: ian manlapaz. contents what are igneous rocks? the relative amounts of just...
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Contents
What are Igneous Rocks? The relative amounts of just three main
minerals Textures To name the rock References
The relative amounts of just three main minerals
Quartz plagioclase feldspar potassium feldspar mafic minerals
Terms from The relative amounts of just three main minerals
Feldspar-Any of a group of abundant rock-forming minerals occurring principally in igneous, plutonic, and some metamorphic rocks, and consisting of silicates of aluminum with potassium, sodium, calcium, and, rarely, barium.
Terms from The relative amounts of just three main minerals
Mafic-A term used to describe minerals or igneous rocks that are rich in iron and/or magnesium.
Terms from The relative amounts of just three main minerals
Felsic-A term used to describe light-colored igneous rocks with an abundance of light-colored minerals, especially felspars and quartz.
Textures
Intrusive- igneous rock that forms when magma is trapped deep inside the Earth.
Extrusive-igneous rock that is produced
when magma exits and cools outside of, or very near the Earth’s surface.