« previous next »

Author Question: How do the holes form in vesicular igneous rocks, such as scoria and pumice? What will be an ideal ... (Read 28 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?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

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

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Arctic and alpine cushion plant form and orientation increases heat gain from sunlight and the surro Arctic and alpine cushion plant form and orientation increases heat gain from sunlight and the surro
Bonobo females form close alliances, maintained through sex, but these alliances are lacking in chim Bonobo females form close alliances, maintained through sex, but these alliances are lacking in chim
Write the equation in general form of the line passing through the point Write the equation in general form of the line passing through the point
Chemical, Biochemical, and Organic Sedimentary Rocks Chemical, Biochemical, and Organic Sedimentary Rocks
How to visualize division in the Odds form of Bayes's Theorem? How to visualize division in the Odds form of Bayes's Theorem?
The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino ... The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino ...
Video: Protein catabolism - deamination

For a complete list of videos, visit our video library