Author Question: What are the three (3 ) types of metamorphism? Where and under what conditions does each ... (Read 24 times)

jon_i

  • Hero Member
  • *****
  • Posts: 549
What are the three (3 ) types of metamorphism? Where and under what conditions does each occur?

Question 2

The Himalayas today can best be described as ____.
 A)volcanically active
 B)seismically active but without active mountain building
 C)a place of mountain building because there is no seismic activity
 D)no longer tectonically active
 E)seismically active with active mountain building



amit

  • Sr. Member
  • ****
  • Posts: 364
Answer to Question 1

Contact metamorphism takes place when a body of magma alters the surrounding country rock. At shallow depths, intruding magma raises the temperature of the surrounding rock, causing thermal alteration. Furthermore, the release of hot fluids into the country rock by the cooling intrusion can aid in the formation of new minerals.

Dynamic metamorphism is associated with faults or fault zones, where rocks are subjected to high levels of differential pressure. The metamorphic rocks that result from pure
dynamic metamorphism are typically restricted to narrow zones adjacent to faults.

Regional metamorphism is responsible for the formation of most metamorphic rocks. It occurs over a large area and is usually caused by tremendous temperatures, pressures, and deformations all occurring together within the deeper portions of the crust. Regional metamorphism is most obvious along convergent plate boundaries where rocks are intensely deformed and recrystallized during convergence and subduction.

Answer to Question 2

E



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

For a complete list of videos, visit our video library