Table of Contents
- 1 How would you describe volcanism?
- 2 What are 3 volcanic features?
- 3 Which of the following best describes volcanism?
- 4 What is volcanism short answer?
- 5 What are the main regions of volcanism in the world?
- 6 How many volcanic zones are there?
- 7 What are the three major volcanic zones?
- 8 What are the top 10 largest volcanoes in the world?
How would you describe volcanism?
Volcanism is the eruption of molten rock (magma) onto the surface of a planet. A volcano is the vent through which magma and gases are discharged.
What are 3 volcanic features?
Volcanic Features and Landforms
- Craters. Craters form as the result of explosive eruptive activity at a volcanic vent where rock, magma, and other material is ejected leaving a conical void.
- Calderas.
- Diatremes and Maars.
- Lava Flows.
- Lava Tubes.
- Fumaroles.
- Geothermal Features.
What are volcanic zones?
A volcanic belt is a large volcanically active region. These are zones of variably metamorphosed mafic to ultramafic volcanic sequences with associated sedimentary rocks that form what are known as greenstone belts. They are thought to have formed at ancient oceanic spreading centers and island arc terranes.
What are the different types of volcanism?
Volcanoes are grouped into four types:
- Cinder cones.
- Composite volcanoes.
- Shield volcanoes.
- Lava volcanoes.
Which of the following best describes volcanism?
geo quiz 6
| Question | Answer |
|---|---|
| The Icelandic volcanoes are related to plate tectonics because ________. | they lie on a spreading center where two plates are moving apart |
| Which one of the following best describes volcanism in the Cascade Range, northwestern United States? | related to plate subduction |
What is volcanism short answer?
Volcanism (or volcanicity) is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics and volcanic gases erupt through a break in the surface called a vent.
What is intrusive volcanism?
Intrusive volcanism is when magma is forced into the rocks that make up the Earth’s crust. When it cools and become solid while still underground, different features called plutons are formed. The rock formed is intrusive igneous rock.
What are the parts of a volcano briefly describe each?
Sill – A flat piece of rock formed when magma hardens in a crack in a volcano. Vent – An opening in Earth’s surface through which volcanic materials escape. Lava – Molten rock that erupts from a volcano that solidifies as it cools. Crater – Mouth of a volcano – surrounds a volcanic vent.
What are the main regions of volcanism in the world?
Earth’s Active Volcanoes
- Africa and Surrounding Islands.
- Southwest Pacific, Southeast Asia, and India.
- East Asia (including Japan and Kamchatka)
- Central Pacific and South Pacific, New Zealand.
- Alaska and the Northern Pacific Region.
- North America.
- Central America.
- West Indies.
How many volcanic zones are there?
It is possible to divide the volcanoes of the world into seven regions as follows: (1) volcanoes of the Pacific Ocean island arcs and Alaska continental rim,(2) volcanoes of the East Pacific continental rim, (3) volcanoes of alpine-Indonesian mountain belt, (4) volcanoes of East African–Arabian belt, (5) volcanoes of …
What are the 3 types of volcanic eruptions?
Types of eruptions
- Hydrothermal eruption. An eruption driven by the heat in a hydrothermal systems.
- Phreatic eruption. An eruption driven by the heat from magma interacting with water.
- Phreatomagmatic eruption.
- Lava.
- Strombolian and Hawaiian eruptions.
- Vulcanian eruptions.
- Subplinian and Plinian eruptions.
What are the 3 main types of volcanoes and their characteristics?
There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes. Figure 11.22 illustrates the size and shape differences amongst these volcanoes. Shield volcanoes, which get their name from their broad rounded shape, are the largest.
What are the three major volcanic zones?
The Andean Volcanic Belt is segmented into four main areas of active volcanism; the Northern, Central, Southern, and Austral volcanic zones, each of which is a separate continental volcanic arc.
What are the top 10 largest volcanoes in the world?
Top 10 Stunning Volcanoes Around the World 10. Mount Teide , Tenerife , Canary Islands , Spain 9. Mount Etna , Catania, Sicily, Italy 8. Sakurajima , Kyushu , Japan 7. Whakaari/White Island, Bay of Plenty, New Zealand 6. Mount Kilimanjaro, Kilimanjaro National Park, Tanzania 5. Kelimutu Volcano, Flores Island, Indonesia
Why are volcanoes likely to form at subduction zones?
Volcanoes and volcanic activity often occur as a result of the subduction process because the subducting slab releases liquids as it moves into the extreme temperatures of the mantle layer. These extremely hot liquids, which primarily consist of carbon dioxide and ocean water, effectively melt the plate that has remained on top.
What is the most explosive type of volcano?
The most explosive type of volcano is the caldera. The cataclysmic explosion of these volcanoes leaves a huge circular depression at the Earth’s surface. This depression is usually less than 40 kilometers in diameter. These volcanoes form when “wet” granitic magma quickly rises to the surface of the Earth.