« previous next »

Author Question: Briefly explain why felsic intrusive rocks are actually more common than mafic intrusive rocks What ... (Read 71 times)

elizabeth18

  • Hero Member
  • *****
  • Posts: 559
on: Jul 15, 2018
Briefly explain why felsic intrusive rocks are actually more common than mafic intrusive rocks What will be an ideal response?

Question 2

Why does Bowen's reaction series predict that mafic intrusive rocks should be much more common
  than felsic intrusive rocks? What will be an ideal response?



s.meritte

  • Sr. Member
  • ****
  • Posts: 306
Reply #1 on: Jul 15, 2018
Answer to Question 1

Partial melting of mafic oceanic rocks and silica-rich sediments yields magmas richer in silica than the
original magma. Also, assimilation of continental crust into the magma raises the silica values.



Answer to Question 2

If crystal settling produces the magma, there would need to be about 10 times as much mafic magma
present to yield the amount of felsic rock.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

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?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Examples of common forms of strabismus: (A) esotropia with the right eye turning inward and (B) exot Examples of common forms of strabismus: (A) esotropia with the right eye turning inward and (B) exot
McBurney’s point is the common location of pain in children and adolescents with appendicitis. McBurney’s point is the common location of pain in children and adolescents with appendicitis.
Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his
A child suffering from malaria, one of the most common and deadly infectious diseases. A child suffering from malaria, one of the most common and deadly infectious diseases.
Common Prefixes Cont. Common Prefixes Cont.
Common Characteristics of the Inheritance of Autosomal Common Characteristics of the Inheritance of Autosomal
Video: Acid-base imbalances - compensation of respiratory acidosis and alkalosis

For a complete list of videos, visit our video library