Author Question: What are the three (3 ) types of metamorphism? Where and under what conditions does each ... (Read 67 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?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

For a complete list of videos, visit our video library