What are the types of volcanoes? Name them and explain each in short.
Answers
Explanation :
There are three types of Volcanoes :-
(i) Active Volcanoes
(ii) Dormant Volcanoes
(iii) Extinct Volcanoes
(i) Active Volcanoes : These are the volcanoes which are presently in active state and have erupted in the recent past.
(ii) Dormant Volcanoes : These volcanoes have not erupted in recent historical period.
(iii) Extinct Volcanoes : These are the types which have not erupted in the present geological period and not likely to become active again.
Answer:
There are four varieties of volcanoes according to geologists, they are alloted bellow:-
1.Cinder cones
Cinder cones are the most common type of volcano. A cinder cone has a cone shape, but is much smaller than a composite volcano. Cinder cones rarely reach 300 meters in height but they have steep sides. Cinder cones grow rapidly, usually from a single eruption cycle. Cinder cones are composed of small fragments of rock, such as pumice, piled on top of one another. The exact composition of a cinder cone depends on the composition of the lava ejected from the volcano. Cinder cones usually have a crater at the summit.
2. Composite volcanoes
Composite volcanoes are made of felsic to intermediate rock. The viscosity of the lava means that eruptions at these volcanoes are often explosive. Mt. Fuji, the highest mountain in Japan, is a dormant composite volcano.
The viscous lava cannot travel far down the sides of the volcano before it solidifies, which creates the steep slopes of a composite volcano. Viscosity also causes some eruptions to explode as ash and small rocks. The volcano is constructed layer by layer, as ash and lava solidify, one upon the other. The result is the classic cone shape of composite volcanoes.
3.Shield Volcanoes
Shield volcanoes get their name from their shape. Although shield volcanoes are not steep, they may be very large. Shield volcanoes are common at spreading centers or intraplate hot spots. Mauna Loa Volcano in Hawaii is the largest shield volcano on Earth with a diameter of more than 112 kilometers (70 miles). The volcano forms a significant part of the island of Hawaii.The lava that creates shield volcanoes is fluid and flows easily. The spreading lava creates the shield shape. Shield volcanoes are built by many layers over time and the layers are usually of very similar composition. The low viscosity also means that shield eruptions are non-explosive.
4. Supervolcanos
Supervolcano eruptions are extremely rare in Earth history. It’s a good thing because they are unimaginably large. A supervolcano must erupt more than 1,000 cubic km (240 cubic miles) of material, compared with 1.2 km3 for Mount St. Helens or 25 km3 for Mount Pinatubo, a large eruption in the Philippines in 1991. Not surprisingly, supervolcanoes are the most dangerous type of volcano.Supervolcanoes are a fairly new idea in volcanology. The exact cause of supervolcano eruptions is still debated. However, scientists think that a very large magma chamber erupts entirely in one catastrophic explosion. This creates a huge hole or caldera into which the surface collapses.
Hope it helps you and please mark me brainliest and drop some thanks na!