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

Author Question: Why are plug dome volcanoes considered dangerous? ... (Read 56 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!

dyrone

  • Member
  • Posts: 322
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

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

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

An indirect injection diesel engine uses a prechamber and a glow plug. An indirect injection diesel engine uses a prechamber and a glow plug.
A typical two-wire coil-on-plug ignition system showing the triggering and the switching being ... A typical two-wire coil-on-plug ignition system showing the triggering and the switching being ...
Always take the time to install spark plug wires back into the original holding brackets (wiring ... Always take the time to install spark plug wires back into the original holding brackets (wiring ...
A spark plug thread chaser is a low-cost tool that hopefully will not be used often, but is ... A spark plug thread chaser is a low-cost tool that hopefully will not be used often, but is ...
The permissible exposure limit (PEL) and immediately dangerous to life and health (IDLH) ... The permissible exposure limit (PEL) and immediately dangerous to life and health (IDLH) ...
Climate Change: Volcanoes Climate Change: Volcanoes
Video: Type of Cell Junctions - Desmosome, Hemidesmosomes and Gap Junctions

For a complete list of videos, visit our video library