Author Question: Which two minerals define a felsic composition? A) Pyroxene and amphibole B) Muscovite and ... (Read 67 times)

jman1234

  • Hero Member
  • *****
  • Posts: 560
Which two minerals define a felsic composition?
 
  A) Pyroxene and amphibole
  B) Muscovite and biotite micas
  C) Quartz and potassium feldspar
  D) Plagioclase feldspar and biotite mica

Question 2

Peridotite is the main constituent of which part of the Earth?
 
  A) Crust
  B) Magma chambers
  C) Rift zones
  D) Upper mantle



kjohnson

  • Sr. Member
  • ****
  • Posts: 330
Answer to Question 1

Answer: C

Answer to Question 2

Answer: D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

For a complete list of videos, visit our video library