« previous next »

Author Question: Explain how migmatites form. Why are they difficult to fit into any of the three basic rock types? ... (Read 13 times)

karen

  • Hero Member
  • *****
  • Posts: 537
on: Jul 16, 2018
Explain how migmatites form. Why are they difficult to fit into any of the three basic rock types?
 
  What will be an ideal response?

Question 2

How can a meteorite impact metamorphose a rock? What temperature/pressure conditions will be present?
 
  What will be an ideal response?


jaymee143

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Gneissic rocks undergo partial melting, which melts quartz and feldspar crystals and leaves biotite and amphibole behind. When the rock cools, light bands in the rock will be composed of igneous materials, and dark bands will consist of unmelted metamorphic material. They are not easily placed in any of the three rock groups because they represent a transitional stage, containing both igneous crystals and metamorphic crystals.

Answer to Question 2

Answer: A large, fast-moving body such as a meteorite will impact the Earth at a high velocity, quickly creating a high-pressure, high-temperature environment. The energy of the impact will be transformed into heat energy and shock waves, pulverizing and melting the rock.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Types of changes in chromosome structure Types of changes in chromosome structure
Examples of cell types derived from ectoderm, mesoderm, and endoderm. Examples of cell types derived from ectoderm, mesoderm, and endoderm.
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Carbohydrates: The combining of the monosaccharides glucose and fructose to form the disaccharide ... Carbohydrates: The combining of the monosaccharides glucose and fructose to form the disaccharide ...
The tools necessary to adjust the valves on an engine with adjustable rocker arms include basic hand ... The tools necessary to adjust the valves on an engine with adjustable rocker arms include basic hand ...
Various Types of Skull Fractures Various Types of Skull Fractures
Video: Dietary Cholesterol & LDL

For a complete list of videos, visit our video library