Chapter 17: Continental Arcs - Faculty web pages
Chapter 17: Continental Arcs - Faculty web pages
Chapter 17: Continental Arcs - Faculty web pages
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<strong>Continental</strong> Magmatic <strong>Arcs</strong><br />
Common characteristic – mixture of rock types<br />
• basalt and rhyolite<br />
• called bimodal volcanism<br />
Direct result of magma interactions w/thicker continental<br />
crust<br />
Tendency to explosive activity<br />
•High SiO 2 content<br />
•High viscosity<br />
•Increase in H 2 O content<br />
•Gas expansion during low P boiling of H 2 O
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