What is the term for a volcanic vent that emits primarily gases and vapors, such as steam, sulfur dioxide, and carbon dioxide, rather than lava?

💡 Solution & Explanation

A fumarole is a vent in the Earth's surface connected to underlying magma chambers that primarily releases superheated steam, sulfur dioxide, carbon dioxide, and other volcanic gases without expelling molten lava. Calderas are large volcanic craters formed by the collapse of a volcano following an eruption, whereas shield broad volcanoes eject fluid basaltic lavas. Volcanology terms are standard components of physical geography syllabi.