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

Author Question: Why are plug dome volcanoes considered dangerous? ... (Read 100 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
Gracias!

at

  • Member
  • Posts: 359
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Shield Volcanoes of the Big Island of Hawaii Shield Volcanoes of the Big Island of Hawaii
The heat range of a spark plug is determined by the distance the heat has to flow from the tip to ... The heat range of a spark plug is determined by the distance the heat has to flow from the tip to ...
When checking a coil-on-plug (COP) assembly, check that the primary and secondary wiring looks ... When checking a coil-on-plug (COP) assembly, check that the primary and secondary wiring looks ...
This spark plug boot on an overhead camshaft engine has been arcing to the valve cover causing a ... This spark plug boot on an overhead camshaft engine has been arcing to the valve cover causing a ...
A spark plug from an engine that had a blown head gasket. The white deposits could be from the ... A spark plug from an engine that had a blown head gasket. The white deposits could be from the ...
A platinum tipped spark plug that is fuel soaked indicating a fault with the fuel system or the ... A platinum tipped spark plug that is fuel soaked indicating a fault with the fuel system or the ...
Video: Stress and Immune System Animation

For a complete list of videos, visit our video library