Author Question: Explain three ways in which a lahar can form. What will be an ideal ... (Read 13 times)

s.tung

  • Hero Member
  • *****
  • Posts: 577
Explain three ways in which a lahar can form.
 
  What will be an ideal response?

Question 2

Compare and contrast the major types of calderas.
 
  What will be an ideal response?



EAN94

  • Sr. Member
  • ****
  • Posts: 307
Answer to Question 1

Answer: Answers will vary but should say something about volcanic debris mixing with water. Some ways to form a lahar include rainfall, melting of glaciers, dam failure, and river water.

Answer to Question 2

Answer: Yellowstone-type calderas eject huge volumes of pyroclastic material mainly in the form of ash and pumice by way of pyroclastic flows. These types of calderas are very large and so poorly defined that it is difficult to identify them (they are often called supervolcanoes). Hawaiian-type calderas form gradually because of the loss of lava from a shallow magma chamber. Crater Lake-type calderas form when the magma chamber can no longer support the cone, and it collapses in on itself. This caldera eventually filled with water from rain and melting snow. The cone in Crater Lake is called Wizard Island.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

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?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

There are more bacteria in your mouth than there are people in the world.

For a complete list of videos, visit our video library