Respuesta :
Answer:
Option (4)
Explanation:
In a divergent plate boundary, two plates move opposite to one another. This results in the creation of a rift or rift valley in the continents or a mid-oceanic ridge in the oceanic crust. The mid oceanic ridge is the boundary where the magma rises upward and reaches the surface of the ocean floor. The geologically youngest rocks are deposited in this ridge.
On the other hand, the convergent of two continental plates results in the formation of a large mountain belts, where the rocks are subjected to large compression and there occurs folding and faulting of rocks. For example, the Himalaya formed due to the collision of Indo-Australian plate and Eurasian plate.
Thus, the mid-oceanic ridges are formed at the site of divergent plate boundaries, where as the Himalayas are formed at the convergent plate boundaries.
Hence, the correct answer is option (4).
There are three plate boundaries, which depends on the plates' movements. The correct option is 4. The mid-ocean ridge formed at divergent plate boundaries. The Himalayas formed at convergent plate boundaries.
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The crust is the outermost layer of the earth. It is divided into many plates that move over the mantle.
These plates are limited by three types of ridges or borders that differ in the movement they produce.
Boundaries types:
I. Divergent:
- This boundary occurs when two plates separate and molten material rises from the mantle creating a new crust.
- The hot material creates a new seabed between the separating plates, expanding the sea bottom.
II. Convergent.
- Collision area between two plates.
- Two oceanic plates might collide, or one oceanic plate with a continental one.
- In this last case, the oceanic crust sinks under the continental plate, and magma rises to the surface by crevices.
- The thicker and older plate subduces under the other plate.
III. Transforming.
- The plates slide laterally with each other, and they are usually called faults.
- It is associated, in general, with the oceanic ridge, although it might also occur in the continental plate.
- No rocky material is either destroyed or formed.
- When the plates move and produce a displacement of one transforming limits from side to side, earthquakes occur.
- The movement breaks the crust and originates pronounced fractures.
The mid-ocean ridge was created by divergent boundaries.
- They are created by fractures in the oceanic crust and lithosphere because hot magma is rising from the mantle.
- These movements expand the seafloor and separate continents.
- Among many different oceanic ridges, we can mention the Atlantic ridge, the Chilean ridge, the East Pacific Ridge, and the Indian ridges.
The Himalayas are examples of convergent boundaries.
- About ten million years ago, the Indian plate collided with the Eurasian plate, producing the Himalayan peaks group.
- The Indian plate separated from the African plate and migrated forward to the Eurasian plate.
- Both plates collided, the Indian plate started to subduct under the Eurasian plate.
- While doing so, deposits and sediments first produced islands, and then, as the Indian plate kept moving, they originated the Himalayas, with an elevation of more than 8,000 m over the sea level.
The correct option is 4. The mid-ocean ridge formed at divergent plate boundaries. The Himalayas formed at convergent plate boundaries.
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