The characteristic "rotten egg" smell of many active volcanoes is derived from ________.
A) iron and magnesium within lava
B) carbon dioxide gas
C) stale water within the magma chamber
D) hydrogen sulfide gas

Question

Quizplus · Accepted Answer

The "rotten egg" smell associated with many active volcanoes is caused by the release of hydrogen sulfide gas, which has a strong sulfuric odor similar to that of rotten eggs. This gas is produced when sulfur-containing minerals in the magma or surrounding rocks are heated and vaporized by the high temperatures of the volcanic activity.

The Characteristic "Rotten Egg" Smell of Many Active Volcanoes Is