Author Question: The most violent volcanic explosions are generated from A) basaltic lava flows. B) andesitic ... (Read 92 times)

dmcintosh

  • Hero Member
  • *****
  • Posts: 517
The most violent volcanic explosions are generated from
 
  A) basaltic lava flows.
  B) andesitic lava flows.
  C) granitic lava flows.
  D) ocean floor lava flows.

Question 2

What does partial melting have to do with silica content of a magma?
 
  What will be an ideal response?



diana chang

  • Sr. Member
  • ****
  • Posts: 288
Answer to Question 1

Answer: B

Answer to Question 2

Answer: Partial melting produces magmas with a higher silica content than the parent rock because the high silica content minerals are the first to melt and the lower silica content minerals are left unmelted.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

For a complete list of videos, visit our video library