This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why are plug dome volcanoes considered dangerous? ... (Read 59 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
on: Aug 7, 2018
Why are plug dome volcanoes considered dangerous?

Question 2

What is the main factor that determines whether a volcanic eruption is explosive or effusive? How does that factor affect eruptions in this way?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

phuda

  • Sr. Member
  • ****
  • Posts: 348
Reply #1 on: Aug 7, 2018
Answer to Question 1

Plug domes form where extremely viscous silica-rich magma pushes up into the vent of a volcanic cone but does not flow further. Great pressures build up, producing the potential for extremely violent explosive eruptions, including pyroclastic flows.

Answer to Question 2

Viscosity is the main factor. Magma viscosity influences the explosiveness of a volcanic eruption through its effect on the dissolved gas content of the magma, which tries to escape the magma as the magma rises closer to the surface. Gases are not vented easily from more viscous magmas, allowing gas pressure to build.


frankwu

  • Member
  • Posts: 549
Reply 2 on: Aug 7, 2018
Wow, this really help

billybob123

  • Member
  • Posts: 336
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

The Border Collie is considered to be one of the most intelligent breeds. The Border Collie is considered to be one of the most intelligent breeds.
The initial timing is where the spark plug fires at idle speed. The computer then advances the ... The initial timing is where the spark plug fires at idle speed. The computer then advances the ...
A spark tester looks like a regular spark plug with an alligator clip attached to the shell. This ... A spark tester looks like a regular spark plug with an alligator clip attached to the shell. This ...
Volcanoes eject reflective aerosols into the atmosphere Volcanoes eject reflective aerosols into the atmosphere
Types of Volcanoes Types of Volcanoes
Types of Volcanoes Types of Volcanoes
Video: Pressure volume relationships - Normal inspiration and expiration

For a complete list of videos, visit our video library