1. Warm-up Which type of rock is formed from cooling magma?
Define “Weathering” in your own words.
Which type of rock is formed due to extreme heat and pressure?

3. Group to which rock belongs
Copy and complete…
Letter of Sample
Route Taken
Group to which rock belongs

4. “Igneous Rocks”
“ Ignis ” = Fire
Chapter 3, Section 2

5. Igneous As magma/lava rises it cools Elements get closer
Combine & form minerals
Minerals form igneous!

6. Igneous: 2 Types. Intrusive Extrusive Magma cools beneath surface
“intruder!”
Extrusive
Lava cools above surface
“Extrusive” rock
“Ex-it!”

7. Magma vs. Lava

8. Compare / Contrast!
Extrusive - Rhyolite
Intrusive - Granite

9. Classification? Composition Texture Size Shape Arrangement of crystals
What it’s made of!
Proportion of light & dark minerals

10. 4 Textures Coarse-grain Fine-grain Glassy Porphyritic Slow cooling
Large crystals
Fast
Small
VERY fast
NO TIME for crystals!
Different cooling speeds
Different sizes!

11. Course & Fine-Grained Texture
Fine-Grained Basalt
Course-Grained Gabbro
Coarse-Grain
Slow cooling
Large crystals
Fine-Grain
Fast cooling
Small crystals

12. Glassy & Porphyritic Texture
Fast!
Ions can’t “align”
Porphyritic:
Different size minerals
B/C of different rates of cooling

13. Granitic & Basaltic Composition
10% dark minerals
70% light
Basaltic:
Many dark minerals
Iron & Magnesium!

14. Andesitic & Ultramafic Composition
In-between granitic & basaltic
25% dark minerals
Ultramafic:
Mostly dark minerals
Mantle

15. Bowen’s Reaction Series

16. Classification of Igneous Rocks

17. HW
Read Chapter 3, Section 3
Do 3.3 SA #1-9 (pg. 79)

18. Assignment: OBJECTIVE: Get your quiz results Get a copy of the quiz
Correct missed questions
INCLUDE:
Number.
Question (written-out).
Complete sentence from book.
Page number from book.
For EVERY missed problem
Attach your quiz score sheet to your corrections