« previous next »

Author Question: How do the holes form in vesicular igneous rocks, such as scoria and pumice? What will be an ideal ... (Read 62 times)

nevelica

  • Hero Member
  • *****
  • Posts: 563
on: Jul 15, 2018
How do the holes form in vesicular igneous rocks, such as scoria and pumice? What will be an ideal response?

Question 2

What does a porphyritic texture tell us about the history of an igneous rock? What will be an ideal response?


recede

  • Sr. Member
  • ****
  • Posts: 315
Reply #1 on: Jul 15, 2018
Answer to Question 1

They result from the entrapment of gases that come out of the liquid magma when the pressure is
released.



Answer to Question 2

The magma cooled at two rates: first slowly, probably underground, and then more rapidly.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Rocks are the most common geosphere materials, and can be fun, dangerous, beauti Rocks are the most common geosphere materials, and can be fun, dangerous, beauti
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Many plastic intake manifolds are constructed using many parts glued together to form complex ... Many plastic intake manifolds are constructed using many parts glued together to form complex ...
Hail is precipitation in the form of hard, rounded pellets of ice. Hail is precipitation in the form of hard, rounded pellets of ice.
Western boundary currents form where gyres are confined by continents Western boundary currents form where gyres are confined by continents
Write in vertex form by completing the square Write in vertex form by completing the square
Video: What is Reverse Osmosis?

For a complete list of videos, visit our video library