This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Relate silica content to crystallization from a magma. What will be an ideal ... (Read 23 times)

RODY.ELKHALIL

  • Hero Member
  • *****
  • Posts: 591
on: Jul 29, 2018
Relate silica content to crystallization from a magma.
 
  What will be an ideal response?

Question 2

Most of the batholithic-sized plutons found in the continents are composed of
 
  A) obsidian.
  B) basalt.
  C) granite.
  D) sandstone.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

amandalm

  • Sr. Member
  • ****
  • Posts: 306
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: First of all crystallization allows a single magma to generate several different igneous rocks. Minerals with high melting points, have a low silica content, so will crystallize first, followed by minerals with lower melting points (those containing larger amounts of silica). As crystallization proceeds, the composition of the liquid in which the crystals form changes. It becomes depleted in the constituents of minerals that have already crystallized and enriched in the constituents of minerals yet to crystallize, which acts to increase the silica content of the remaining liquid.

Answer to Question 2

Answer: C


RODY.ELKHALIL

  • Hero Member
  • *****
  • Posts: 591
Reply #2 on: Jul 29, 2018
Thank you!


amandalm

  • Sr. Member
  • ****
  • Posts: 306
Reply #3 on: Jul 29, 2018
Always glad to help...


« previous next »
 

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Results of selective breeding for oil content in corn plants. Results of selective breeding for oil content in corn plants.
Surfactant-tempalted mesostructured silica Surfactant-tempalted mesostructured silica
Typical Caffeine Content of Chocolate and Several Beverages Typical Caffeine Content of Chocolate and Several Beverages
The Influence of the September 11, 2001 Terrorist Attacks on Dream Content The Influence of the September 11, 2001 Terrorist Attacks on Dream Content
Three conformations of DNA. B-DNA is most common, A-DNA is likely an artifact of crystallization in Three conformations of DNA. B-DNA is most common, A-DNA is likely an artifact of crystallization in
Gene content of mitochondrial genomes Gene content of mitochondrial genomes
Video: Optic Nerve and Optic Disk Animation (Part 2 of 2)

For a complete list of videos, visit our video library