Why are two plates spreading considered to be 'constructive'?
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Plate tectonics is a theory about how the lithosphere is in motion. It is believed that the lithospheric plates ride atop the asthenosphere, which is constantly deforming. Convection currents in the mantle provide the movement of molten material that pushes the lithospheric plates.
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Why are two plates spreading considered to be 'constructive'?
Explanation:
- The plates that are found along the divergent boundaries of the Atlantic ocean are known as the constructive plates as they construct the seafloor forms the below and they are created by the rising of the magma by the convection current form the mantel and they help in the expansion of the oceanic crust and thus we tend to see the older rocks near the seashores and the new ones near the edges or the margins of the plates.
- The constructive plate of the Atlantic ocean is thus expanding plate margin and the pacific is shrinking plate as it formed near the destructive plate boundary. The spreading enable the plates to move further apart and thus is considered to be constructive.
Know more about the two plates and spreading considered to be constructive.
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