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