Discussion
The process that continually adds new crust is
Answer: C
New crust is continually added by seafloor spreading.
At mid-ocean ridges, such as the Mid-Atlantic Ridge, tectonic plates move apart and magma rises from the mantle, cools and forms new oceanic crust. The ocean floor spreads outward from the ridge, so the youngest rocks lie at the ridge and the oldest farther away, as Harry Hess proposed in the 1960s.
Subduction does the opposite, destroying crust as one plate sinks beneath another. Earthquakes are the result of plate movement, not a process that adds crust, and convection in the mantle drives plate motion but does not itself create crust.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development