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Consider the following statements with reference to Seafloor Spreading:
1. New crust is created in the process.
2. It occurs at divergent plate boundaries.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements with reference to Seafloor Spreading...
Seafloor Spreading
  • Seafloor spreading is the process of magma welling up in the rift as the old crust pulls itself in opposite directions.
  • Cold seawater cools the magma, creating a new crust. The upward movement and eventual cooling of this magma has created high ridges on the ocean floor over millions of years. Hence statement 1 is correct.
  • Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other. Hence statement 2 is correct.
  • The East Pacific Rise is a site of major seafloor spreading in the Ring of Fire.
    • It is located on the divergent boundary of the Pacific Plate, the Cocos Plate (west of Central America), the Nazca Plate (west of South America), the North American Plate and the Antarctic Plate.
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Community Answer
Consider the following statements with reference to Seafloor Spreading...
New Crust Creation

- Seafloor spreading is the process by which new oceanic crust is formed through volcanic activity at mid-ocean ridges.
- As magma rises to the surface, it cools and solidifies, creating new crust.
- This process is continuous and results in the gradual widening of the ocean basins.

Divergent Plate Boundaries

- Seafloor spreading occurs at divergent plate boundaries.
- Divergent plate boundaries are areas where tectonic plates are moving away from each other.
- This movement creates a gap between the plates, allowing magma to rise and form new crust.

Explanation of Correct Answer

The correct answer is option C, which states that both statements 1 and 2 are correct.

Seafloor spreading is a fundamental process in plate tectonics. It involves the creation of new oceanic crust at mid-ocean ridges, which are a type of divergent plate boundary.

At these ridges, two tectonic plates are moving away from each other. As they separate, magma from the mantle rises to fill the gap. This magma cools and solidifies, forming new crust. Over time, this process leads to the continuous creation of new oceanic crust and the widening of the ocean basins.

Therefore, statement 1 is correct because new crust is indeed created through seafloor spreading. Statement 2 is also correct because seafloor spreading occurs specifically at divergent plate boundaries.

Overall, seafloor spreading plays a crucial role in the Earth's geology and the movement of tectonic plates. It is responsible for the formation of new crust, the creation of mid-ocean ridges, and the continuous renewal of the ocean basins.
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