Multiple choice general knowledge What are the type of volcanoes. Fissure vents Submarine Subglacial All of the above Reveal answer Fill a bubble to check yourself D Correct answer Explanation Volcanoes are classified by their eruptive type and formation location. Fissure vents erupt through linear cracks, submarine volcanoes form on the ocean floor, and subglacial volcanoes erupt under ice sheets - all are recognized volcanic types.