Tuesday, February 25, 2020

Earth Parts #29 - Bowen's Reaction Series



The image below is used for educational purposes.  (As I don't have a good hand sample of a Diorite - as an example of an Intermediate Igneous Rock - I had to use a Porphyritic Andesite, from the "Campus Andesite", a shallow Eocene intrusion underlying the University of Texas-El Paso campus.)
Figure 1.
Below (Figures 2 and 3) are descriptions of the Mafic and Felsic "End Members" of this range. 
 Figure 2.  Gabbro - unknown source.
Figure 3.  Granite - Pennsylvanian Elberton Granite.


Figure 4.  Ultramafic Mantle Xenolith - Quaternary Maar eruption.

At least two more Bowen Reaction Series posts are planned for the coming days.  Repetition helps enforce memorization, while different articulations may induce different insights.

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