What specific chemicals typically erupt from a volcano? What are the effects of each on the environment?

rocky Dave


Dear Dave,

The most common elements in materials erupted by volcanoes are: silicon (Si), oxygen (O), magnesium (Mg), iron (Fe), aluminum (Al), calcium (Ca), sodium (Na), potassium (K), titanium (Ti), phosphorous (P), carbon (C), hydrogen (H), and sulfur (S). Alone and in various combinations and proportions they make an amazing variety of materials including basalt, diamonds, and water.

As for the effects of each on the environment, oxygen, calcium, carbon, hydrogen and sulfur would be the key elements to track. I suggest you read "Consider a Spherical Cow" by John Harte. It follows these elements in the atmosphere, water, and rocks.

Steve Mattox, University of North Dakota

Suggested Reference:

John Harte, 1988, Consider a Spherical Cow: A course in environmental problem solving: Mill Valley, California, University Science Books, 283 p.


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