Fissure vent
A fissure vent, also known as a volcanic fissure, eruption fissure or simply a fissure, is a linear
spatter cones. Small fissure vents may not be easily discernible from the air, but the crater rows (see Laki) or the canyons (see Eldgjá
) built up by some of them are.
The dikes that feed fissures reach the surface from depths of a few kilometers and connect them to deeper magma reservoirs, often under volcanic centers. Fissures are usually found in or along rifts and rift zones, such as Iceland and the East African Rift. Fissure vents are often part of the structure of shield volcanoes.[1][2]
Iceland
In Iceland, volcanic vents, which can be long fissures, often open parallel to the rift zones where the
composite volcanoes, often with calderas, which have been formed during thousands of years, and eruptions with one or more magma reservoirs underneath controlling their respective fissure system.[4]
The
Katla in South Iceland, ~18 km3 (4.3 cu mi) of lava were released.[6] In September 2014, a fissure eruption was ongoing on the site of the 18th century lava field Holuhraun. The eruption is part of an eruption series in the Bárðarbunga volcanic system.[7]
Hawaii
The radial fissure vents of
spatter cone
are hot and plastic enough to weld together, while the fragments that form a cinder cone remain separate because of their lower temperature.
List of fissure vents
References
- ^ "V. Camp, Dept. of Geologic Sciences, Univ. of San Diego: How volcanoes work. Eruption types. Fissure eruptions". Archived from the original on 2018-02-28. Retrieved 2014-09-24.
- ^ "Geology glossary". www.volcanodiscovery.com. Retrieved September 25, 2001.
- S2CID 55021384. Archived from the original(PDF) on 2017-11-18. Retrieved 2014-09-24.
- S2CID 53446884.
- ^ "Institute of Earth Sciences, University of Iceland: Grímsvötn. Received 9/24, 2014". Archived from the original on 2018-05-14. Retrieved 2014-09-24.
- ^ Institute of Earth Sciences, University of Iceland: Katla. Received 9/24, 2014.
- ^ "Institute of Earth Sciences, University of Iceland: Bardarbunga 2014". Archived from the original on 2021-04-15. Retrieved 2014-09-24.
- S2CID 129864863.
External links
- Media related to Fissure vents at Wikimedia Commons
- Detailed list and KML files for Fissure Vents
- Volcanolive.com Page on Fissure Vents