Mineral names carry a certain mystique - rock names seem more utilitarian
Igneous Rocks – Day 1.5
Igneous Rock TexturesA visual guide
I love rocks!
Igneous Rock Day – Brian “The Brain”
Review – Igneous Rocks Created from a melt – recrystallize Classified based on texture and mineral
composition May be mafic or felsic As we learned from Mr. Lee,
› “Igneous rocks form when volcanoes eruptBecause when the lava finally gets cool enoughThe molten material begins to hardenAnd igneous rocks are formed, ballin’”
Aphanetic Can’t be seen with the naked eye (crystal grains)
Phaneritic Can be seen with the naked eye (crystal grains)
Porphorytic Matrix aphanetic with large clusters of phaneritic
pieces
Pegmatitic crystals of minerals larger than thumb
Big
crys
tals
Glassy Vitreous, glossy, due to quick cool
Amygdaloidal having infilled vesicle with another
mineral
Vesicular Having holes
Scoreacious Frothy rough texture with vesicles that
extend over the surface