Solfataras are a specific type of volcanic vent or fumarole, that primarily emits sulfur-bearing gases, such as hydrogen sulfide and sulfur dioxide. They are often surrounded by yellow crystalline sulfur deposits formed as the gases cool and react with the atmosphere. The name comes from the Solfatara crater in Italy, which is famous for its distinct “rotten egg” smell. ANSWER: (B) Sulfur-bearing gases
‘Solfataras’ are volcanic vents that specifically emit: (A) Only water vapor (B) Sulfur-bearing gases (C) Mud and silt (D) Carbon monoxide
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A solfatara is a geothermal vent characteristic of the late stages of volcanic activity. Unlike general fumaroles that may only release steam, solfataras are defined by their high output of sulfurous vapors. Geographically, these vents are important indicators of magmatic cooling near the surface. The chemical reaction between the gases and oxygen often leads to the sublimation of pure sulfur around the vent. These areas are not only geologically significant but also historically important for the commercial mining of sulfur, which is used in making gunpowder, matches and sulfuric acid for various industries.