« previous next »

Author Question: Why does the lithosphere thicken as it moves away from a mid-ocean ridge? What will be an ideal ... (Read 47 times)

KimWrice

  • Hero Member
  • *****
  • Posts: 579
on: Jul 15, 2018
Why does the lithosphere thicken as it moves away from a mid-ocean ridge?
 
  What will be an ideal response?

Question 2

Discuss how oceanic crust forms. What process generates the necessary magma? Also, be sure to discuss ophiolite sequences and discuss how the formation of each layer contributes to the formation of the crust.
 
  What will be an ideal response?


vish98

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 15, 2018
Answer to Question 1

Answer: Cooling of the asthenosphere will add rigid material to the lithosphere.

Answer to Question 2

Answer: Magma is generated through decompression melting. This magma rises to the surface to fill in the gaps between the diverging tectonic plates. Fractures created by tension provide pathways for magma to rise and spill out on to the ocean floor, creating the pillow basalts. The fractures the basalt moved through become sheeted dikes as the magma cools. Meanwhile, the magma that remained in the magma chamber forms the gabbro bodies.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Retrograde pyelogram. A contrast medium is injected into the ureter using a cystoscope, and the X-ra Retrograde pyelogram. A contrast medium is injected into the ureter using a cystoscope, and the X-ra
Ocean Waste Ocean Waste
A stylized bathymetric profile of the ocean A stylized bathymetric profile of the ocean
Protection of vulnerable areas in the ocean Protection of vulnerable areas in the ocean
Arctic Ocean was isolated Arctic Ocean was isolated
Major Surface-Ocean Currents Major Surface-Ocean Currents
Video: Pneumonia Animation

For a complete list of videos, visit our video library