what are fissure volcanoes?
Answers
A fissure vent, also known as a volcanic fissure or eruption fissure, is a linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is often a few meters wide and may be many kilometers long. ... Fissure vents are often part of the structure of shield volcanoes.
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Fissure vents are a type of volcano in which the lava eruptions through a linear volcanic vent. Usually these eruptions do not involve an explosion. Because fissure vent volcanoes are usually only several meters wide but can range in length up to many kilometers, they are hard to spot when on the ground or from a bird’s eye view because they are mostly flat on the surface with no caldera indicating their location. Instead, they will usually appear to simply be a crack found in the surface of either the ground or ocean floor.
Although fissure vent eruptions are not usually explosive, they can be very large in size and have created large lava fields that have covered many thousands of square miles all over the world including in Ethiopia and Iceland. In Hawaii, several volcanoes have radial fissure vents which will actually create “curtains of fire” when lava fountains erupt on various parts of the fissures.