igneous rock

Ignis is the Latin word for

Fire

When do igneous rocks form

When magma cools and make crystals

Mama is a hot liquid made of

Melted minerals

When magma pours into earths surface it’s called

Lava

Igneous rocks formed underground where magma cools

Slowly

Igneous rocks form above ground where magma cools

Quickly

Types of igneous rocks

Intrusive and extrusive

Slow cooling mamma or lava = large crystals

Coarse grained

Rapid cooling magma or lava =small mineral grains

Fine grained

Lava spews in surface = not enough time for it to form into crystals

Glassy

Contains lot of holes

Vesicular

Large body of magma may take thousands of years to harden

Porphyritic

This is related to how fast lava or magma cools

Texture

Texture of diorite

Coarse grains

Texture of basalt

Fine grain

Texture of andesite

Fine grain

Texture of rhyolite

Fine Grain

Texture of obsidian

Glassy

Texture of granite

Coarse Grains

Texture of scoria

Vesicular

Texture of pumice

Vesicular

Texture of gabbro

Coarse grain

color of diorite

Intermediate

color of basalt

Mafic

color of andesite

Intermediate

color of rhyolite

Felsic

color of obsidian

Mafic/all

color of granite

Felsic

Color of scoria

Mafic

color of pumice

Felsic

color of gabbro

Mafic