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The main gasses that are released during a volcanic eruption are water vapor, carbon dioxide, nitrogen, sulfur, and lesser amounts of chlorine, hydrogen, and argon. carbon dioâ¦xide, carbon monoxide, sulfur hydrogen.
Unformatted text preview: is most abundant dissolved gas in magmas â¢ As magma rises, pressure decreases, water becomes steam bubbles â Basalt magma has lower water content peaceful eruptions â Rhyolitic magma has higher water content and high viscosity many steam bubbles form and can not escape through thick magma, so explode out violent, dangerous eruptions oregonstate.edu â¢ Spreading centers have abundant volcanism because: â Sit above hot asthenosphere â Asthenosphere has low ...