Igneous Rock: Intrusive & Extrusive. Igneous Born of fire, rocks relating to volcanic processes.

Igneous Rock:Intrusive &

Extrusive

Igneous•Born of fire, rocks relating to volcanic processes

A Variety of Types- All Igneous

Observations

Obsidian Diorite

•Black

•Smooth

•Glassy

•Sharp

Obsidian Diorite

•Many colors and crystals

•Rough

•Opaque

Obsidian Diorite

Extrusive

Intrusive

Extruded- Forced

out

Think: Intrusions

!

IntrusiveIntrusive

Extrusive Extrusive

Extrusive

Intrusive

Extrusive Cools:

Cools:

Quickly!

Slowly...

Extrusive

Intrusive

Cools Fast!

Cools Slowly...

Fine Grained- No time for big crystals to

form

Large Grained-

Time for big crystals to

form

Rock:______Observations: __________

I think this is extrusive/intrusive (pick one)Draw

x 7Rocks:

Andesite

Pumice DioriteRhyolite

GraniteBasalt

Obsidian

obs on each rockwhat’s intr/extr?