1. Igneous Processes ll
Phil Simon A. Condat

2. What is Magma -Molten or partially molten rock -silicate liquid
-carbonate and sulfide melts
-lava

3. How does magma form Heat transfer Decompression melting
-upward movement
-rises to an area of low pressure (convention)
-overlying pressure/ decompression
-divergent boundaries
Heat transfer
-hot, liquid rock intrudes into Earth’s cold crust
-melts the surrounding rock
-convergent boundaries
Flux melting
When H2O or CO2 are added to rock
Rocks melt at lower temperature
-subduction zones

4. Magmatic Differentiation
Minerals crystallize out of the melt
- different ingredients separating
suggestkeyword.com
geologyclass.org

5. Magma mixing 2 or more magmas Different chemical compositions “Mix”
Compositions intermediate between end members
basalt and rhyolite
tend to inhibit mixing
lavamagmainfo.weebly.com

6. Magma assimilation -Melts surrounding rocks
-Minerals become part of magma

7. Bowen’s Reaction Series
Norman L. Bowen (geologist)
-”minerals crystallize differently as they cool.”
sirismm.si.edu
studyblue.com

8. Ultramafic – Fe, Mg. Ca Intermediate – combination
Continuous series
Discontinuous series
Residual phases
Ultramafic – Fe, Mg. Ca Intermediate – combination
Mafic – Fe, Mg, Ca Felsic – Si, Na,Al, K

9. References http://www.britannica.com/science/magma-rock#ref74566/
hedcenscience.wordpress.com

10. Thank you for listening!
maxisciences.com